ICE: rmeta/decoder.rs:1130: impossible case reached

[tmandry]

Code

I don't have a reasonable sized reproducer yet.

Meta

rustc --version --verbose:

rustc 1.45.0-nightly (fa51f810e 2020-04-29)
binary: rustc
commit-hash: fa51f810e5b9254904b92660e7280b7d6a46f112
commit-date: 2020-04-29
host: x86_64-unknown-linux-gnu
release: 1.45.0-nightly
LLVM version: 9.0

Regression occurred between bf1f2ee..fa51f81 in 796c0ca (#67343)

Error output

error: internal compiler error: src/librustc_metadata/rmeta/decoder.rs:1130: impossible case reached

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:907:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.45.0-nightly (fa51f810e 2020-04-29) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z dep-info-omit-d-target -Z allow-features= -Z panic_abort_tests -C linker=/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/bin/lld -C link-arg=--sysroot=/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia -C link-arg=-L/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia/lib -C link-arg=-L/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/lib/clang/11.0.0/x86_64-fuchsia/lib -C link-arg=--pack-dyn-relocs=relr -C link-arg=-dynamic-linker=ld.so.1 -C link-arg=--icf=all -C force-frame-pointers -C debuginfo=2 -C opt-level=0 -C link-args=-zstack-size=0x200000 -C linker=/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/bin/lld -C link-arg=--sysroot=/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia -C link-arg=-L/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia/lib -C link-arg=-L/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/lib/clang/11.0.0/x86_64-fuchsia/lib -C link-arg=--pack-dyn-relocs=relr -C link-arg=-dynamic-linker=ld.so.1 -C link-arg=--icf=all -C panic=abort -C link-arg=../../out/default.zircon/user-x64-clang.shlib/obj/system/ulib/syslog/libsyslog.so.debug --crate-type bin

error: aborting due to previous error

Backtrace

error: internal compiler error: src/librustc_metadata/rmeta/decoder.rs:1130: impossible case reached

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:907:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /usr/local/google/home/tmandry/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /usr/local/google/home/tmandry/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1069
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1532
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218
  10: <alloc::boxed::Box<F> as core::ops::function::Fn<A>>::call
             at /mnt/code/fuchsia-rust/rust/src/liballoc/boxed.rs:1048
  11: rustc_driver::report_ice
             at src/librustc_driver/lib.rs:1157
  12: <alloc::boxed::Box<F> as core::ops::function::Fn<A>>::call
             at /mnt/code/fuchsia-rust/rust/src/liballoc/boxed.rs:1048
  13: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/libproc_macro/bridge/client.rs:312
  14: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:481
  15: std::panicking::begin_panic
             at /mnt/code/fuchsia-rust/rust/src/libstd/panicking.rs:404
  16: rustc_errors::HandlerInner::bug
             at src/librustc_errors/lib.rs:907
  17: rustc_errors::Handler::bug
             at src/librustc_errors/lib.rs:659
  18: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
             at src/librustc_middle/util/bug.rs:36
  19: rustc_middle::ty::context::tls::with_opt::{{closure}}
             at src/librustc_middle/ty/context.rs:1799
  20: rustc_middle::ty::context::tls::with_context_opt
             at src/librustc_middle/ty/context.rs:1751
  21: rustc_middle::ty::context::tls::with_opt
             at src/librustc_middle/ty/context.rs:1799
  22: rustc_middle::util::bug::opt_span_bug_fmt
             at src/librustc_middle/util/bug.rs:32
  23: rustc_middle::util::bug::bug_fmt
             at src/librustc_middle/util/bug.rs:12
  24: rustc_metadata::rmeta::decoder::<impl rustc_metadata::creader::CrateMetadataRef>::mir_const_qualif
             at src/librustc_metadata/rmeta/decoder.rs:1130
  25: rustc_metadata::rmeta::decoder::cstore_impl::provide_extern::mir_const_qualif
             at src/librustc_metadata/rmeta/decoder/cstore_impl.rs:122
  26: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_const_qualif>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
  27: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
  28: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
  29: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
  30: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
  31: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
  32: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
  33: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
  34: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
  35: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
  36: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
  37: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
  38: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
  39: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
  40: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
  41: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
  42: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
  43: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
  44: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
  45: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
  46: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
  47: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
  48: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
  49: rustc_middle::ty::query::TyCtxtAt::mir_const_qualif
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
  50: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_const_qualif
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
  51: rustc_mir_build::hair::pattern::PatCtxt::lower_path
             at src/librustc_mir_build/hair/pattern/mod.rs:800
  52: rustc_mir_build::hair::pattern::PatCtxt::lower_pattern_unadjusted
             at src/librustc_mir_build/hair/pattern/mod.rs:552
  53: rustc_mir_build::hair::pattern::PatCtxt::lower_pattern
             at src/librustc_mir_build/hair/pattern/mod.rs:406
  54: rustc_mir_build::hair::pattern::Pat::from_hir
             at src/librustc_mir_build/hair/pattern/mod.rs:362
  55: rustc_mir_build::hair::cx::Cx::pattern_from_hir
             at src/librustc_mir_build/hair/cx/mod.rs:161
  56: rustc_mir_build::hair::cx::expr::convert_arm
             at src/librustc_mir_build/hair/cx/expr.rs:660
  57: rustc_mir_build::hair::cx::expr::make_mirror_unadjusted::{{closure}}
             at src/librustc_mir_build/hair/cx/expr.rs:432
  58: core::iter::adapters::map_fold::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/adapters/mod.rs:785
  59: core::iter::traits::iterator::Iterator::fold::ok::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/traits/iterator.rs:2002
  60: core::iter::traits::iterator::Iterator::try_fold
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/traits/iterator.rs:1878
  61: core::iter::traits::iterator::Iterator::fold
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/traits/iterator.rs:2005
  62: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/adapters/mod.rs:825
  63: core::iter::traits::iterator::Iterator::for_each
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/traits/iterator.rs:658
  64: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T,I>>::spec_extend
             at /mnt/code/fuchsia-rust/rust/src/liballoc/vec.rs:2116
  65: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T,I>>::from_iter
             at /mnt/code/fuchsia-rust/rust/src/liballoc/vec.rs:2096
  66: <alloc::vec::Vec<T> as core::iter::traits::collect::FromIterator<T>>::from_iter
             at /mnt/code/fuchsia-rust/rust/src/liballoc/vec.rs:1981
  67: core::iter::traits::iterator::Iterator::collect
             at /mnt/code/fuchsia-rust/rust/src/libcore/iter/traits/iterator.rs:1660
  68: rustc_mir_build::hair::cx::expr::make_mirror_unadjusted
             at src/librustc_mir_build/hair/cx/expr.rs:432
  69: rustc_mir_build::hair::cx::expr::<impl rustc_mir_build::hair::Mirror for &rustc_hir::hir::Expr>::make_mirror
             at src/librustc_mir_build/hair/cx/expr.rs:27
  70: <rustc_mir_build::hair::ExprRef as rustc_mir_build::hair::Mirror>::make_mirror
             at src/librustc_mir_build/hair/mod.rs:372
  71: rustc_mir_build::hair::cx::Cx::mirror
             at src/librustc_mir_build/hair/cx/mod.rs:104
  72: <rustc_mir_build::hair::ExprRef as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:41
  73: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  74: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
             at src/librustc_mir_build/build/block.rs:182
  75: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block::{{closure}}::{{closure}}
             at src/librustc_mir_build/build/block.rs:38
  76: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  77: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block::{{closure}}
             at src/librustc_mir_build/build/block.rs:27
  78: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_opt_scope
             at src/librustc_mir_build/build/scope.rs:411
  79: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block
             at src/librustc_mir_build/build/block.rs:26
  80: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:48
  81: <rustc_mir_build::hair::Expr as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:53
  82: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  83: rustc_mir_build::build::expr::as_temp::<impl rustc_mir_build::build::Builder>::expr_as_temp
             at src/librustc_mir_build/build/expr/as_temp.rs:100
  84: rustc_mir_build::build::expr::as_temp::<impl rustc_mir_build::build::Builder>::as_temp
             at src/librustc_mir_build/build/expr/as_temp.rs:25
  85: rustc_mir_build::build::expr::as_operand::<impl rustc_mir_build::build::Builder>::expr_as_operand
             at src/librustc_mir_build/build/expr/as_operand.rs:143
  86: rustc_mir_build::build::expr::as_operand::<impl rustc_mir_build::build::Builder>::as_operand
             at src/librustc_mir_build/build/expr/as_operand.rs:101
  87: rustc_mir_build::build::expr::as_rvalue::<impl rustc_mir_build::build::Builder>::expr_as_rvalue
             at src/librustc_mir_build/build/expr/as_rvalue.rs:126
  88: rustc_mir_build::build::expr::as_rvalue::<impl rustc_mir_build::build::Builder>::as_rvalue
             at src/librustc_mir_build/build/expr/as_rvalue.rs:40
  89: rustc_mir_build::build::expr::as_rvalue::<impl rustc_mir_build::build::Builder>::as_local_rvalue
             at src/librustc_mir_build/build/expr/as_rvalue.rs:26
  90: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:399
  91: <rustc_mir_build::hair::ExprRef as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:42
  92: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  93: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr::{{closure}}
             at src/librustc_mir_build/build/expr/into.rs:45
  94: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  95: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:45
  96: <rustc_mir_build::hair::ExprRef as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:42
  97: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  98: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr::{{closure}}
             at src/librustc_mir_build/build/expr/into.rs:45
  99: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
 100: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:45
 101: <rustc_mir_build::hair::Expr as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:53
 102: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
 103: rustc_mir_build::build::Builder::args_and_body
             at src/librustc_mir_build/build/mod.rs:976
 104: rustc_mir_build::build::construct_fn::{{closure}}::{{closure}}::{{closure}}
             at src/librustc_mir_build/build/mod.rs:617
 105: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
 106: rustc_mir_build::build::construct_fn::{{closure}}::{{closure}}
             at src/librustc_mir_build/build/mod.rs:616
 107: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_breakable_scope
             at src/librustc_mir_build/build/scope.rs:392
 108: rustc_mir_build::build::construct_fn::{{closure}}
             at src/librustc_mir_build/build/mod.rs:611
 109: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
 110: rustc_mir_build::build::construct_fn
             at src/librustc_mir_build/build/mod.rs:602
 111: rustc_mir_build::build::mir_build::{{closure}}
             at src/librustc_mir_build/build/mod.rs:154
 112: rustc_infer::infer::InferCtxtBuilder::enter::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_infer/infer/mod.rs:595
 113: rustc_middle::ty::context::GlobalCtxt::enter_local::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1522
 114: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 115: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 116: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 117: rustc_middle::ty::context::GlobalCtxt::enter_local::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1522
 118: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 119: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 120: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 121: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 122: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 123: rustc_middle::ty::context::GlobalCtxt::enter_local
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1514
 124: rustc_infer::infer::InferCtxtBuilder::enter
             at /mnt/code/fuchsia-rust/rust/src/librustc_infer/infer/mod.rs:594
 125: rustc_mir_build::build::mir_build
             at src/librustc_mir_build/build/mod.rs:63
 126: rustc_mir_build::build::mir_built
             at src/librustc_mir_build/build/mod.rs:25
 127: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_built>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 128: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 129: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 130: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 131: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 132: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 133: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 134: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 135: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 136: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 137: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 138: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 139: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 140: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 141: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 142: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 143: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 144: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 145: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 146: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 147: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 148: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 149: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 150: rustc_middle::ty::query::TyCtxtAt::mir_built
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 151: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_built
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 152: rustc_mir::transform::check_unsafety::unsafety_check_result
             at src/librustc_mir/transform/check_unsafety.rs:493
 153: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 154: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 155: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 156: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 157: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 158: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 159: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 160: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 161: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 162: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 163: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 164: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 165: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 166: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 167: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 168: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 169: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 170: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 171: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 172: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 173: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 174: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 175: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 176: rustc_middle::ty::query::TyCtxtAt::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 177: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 178: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
             at src/librustc_mir/transform/check_unsafety.rs:135
 179: rustc_middle::mir::visit::Visitor::super_assign
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:411
 180: rustc_middle::mir::visit::Visitor::visit_assign
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:102
 181: rustc_middle::mir::visit::Visitor::super_statement
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:346
 182: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
             at src/librustc_mir/transform/check_unsafety.rs:115
 183: rustc_middle::mir::visit::Visitor::super_basic_block_data
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:310
 184: rustc_middle::mir::visit::Visitor::visit_basic_block_data
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:84
 185: rustc_middle::mir::visit::Visitor::super_body
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:259
 186: rustc_middle::mir::visit::Visitor::visit_body
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:78
 187: rustc_mir::transform::check_unsafety::unsafety_check_result
             at src/librustc_mir/transform/check_unsafety.rs:506
 188: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 189: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 190: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 191: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 192: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 193: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 194: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 195: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 196: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 197: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 198: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 199: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 200: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 201: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 202: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 203: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 204: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 205: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 206: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 207: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 208: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 209: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 210: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 211: rustc_middle::ty::query::TyCtxtAt::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 212: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 213: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
             at src/librustc_mir/transform/check_unsafety.rs:135
 214: rustc_middle::mir::visit::Visitor::super_assign
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:411
 215: rustc_middle::mir::visit::Visitor::visit_assign
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:102
 216: rustc_middle::mir::visit::Visitor::super_statement
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:346
 217: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
             at src/librustc_mir/transform/check_unsafety.rs:115
 218: rustc_middle::mir::visit::Visitor::super_basic_block_data
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:310
 219: rustc_middle::mir::visit::Visitor::visit_basic_block_data
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:84
 220: rustc_middle::mir::visit::Visitor::super_body
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:259
 221: rustc_middle::mir::visit::Visitor::visit_body
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/mir/visit.rs:78
 222: rustc_mir::transform::check_unsafety::unsafety_check_result
             at src/librustc_mir/transform/check_unsafety.rs:506
 223: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 224: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 225: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 226: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 227: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 228: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 229: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 230: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 231: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 232: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 233: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 234: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 235: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 236: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 237: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 238: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 239: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 240: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 241: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 242: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 243: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 244: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 245: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 246: rustc_middle::ty::query::TyCtxtAt::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 247: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::unsafety_check_result
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 248: rustc_mir::transform::mir_const
             at src/librustc_mir/transform/mod.rs:218
 249: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_const>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 250: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 251: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 252: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 253: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 254: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 255: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 256: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 257: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 258: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 259: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 260: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 261: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 262: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 263: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 264: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 265: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 266: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 267: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 268: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 269: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 270: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 271: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 272: rustc_middle::ty::query::TyCtxtAt::mir_const
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 273: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_const
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 274: rustc_mir::transform::mir_validated
             at src/librustc_mir/transform/mod.rs:249
 275: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_validated>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 276: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 277: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 278: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 279: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 280: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 281: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 282: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 283: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 284: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 285: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 286: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 287: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 288: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 289: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 290: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 291: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 292: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 293: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 294: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 295: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 296: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 297: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 298: rustc_middle::ty::query::TyCtxtAt::mir_validated
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 299: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_validated
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 300: rustc_mir::borrow_check::mir_borrowck
             at src/librustc_mir/borrow_check/mod.rs:96
 301: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_borrowck>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 302: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 303: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 304: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 305: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 306: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 307: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 308: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 309: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 310: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 311: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 312: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 313: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 314: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 315: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 316: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 317: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 318: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 319: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 320: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 321: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 322: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 323: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 324: rustc_middle::ty::query::TyCtxtAt::mir_borrowck
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 325: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_borrowck
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 326: rustc_typeck::collect::type_of::type_of
             at src/librustc_typeck/collect/type_of.rs:117
 327: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::type_of>::compute
             at src/librustc_middle/ty/query/plumbing.rs:362
 328: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 329: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 330: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 331: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at src/librustc_middle/ty/query/plumbing.rs:71
 332: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at src/librustc_middle/ty/context.rs:1690
 333: rustc_middle::ty::context::tls::set_tlv
             at src/librustc_middle/ty/context.rs:1674
 334: rustc_middle::ty::context::tls::enter_context
             at src/librustc_middle/ty/context.rs:1690
 335: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at src/librustc_middle/ty/query/plumbing.rs:71
 336: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at src/librustc_middle/ty/context.rs:1778
 337: rustc_middle::ty::context::tls::with_context::{{closure}}
             at src/librustc_middle/ty/context.rs:1762
 338: rustc_middle::ty::context::tls::with_context_opt
             at src/librustc_middle/ty/context.rs:1751
 339: rustc_middle::ty::context::tls::with_context
             at src/librustc_middle/ty/context.rs:1762
 340: rustc_middle::ty::context::tls::with_related_context
             at src/librustc_middle/ty/context.rs:1775
 341: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at src/librustc_middle/ty/query/plumbing.rs:60
 342: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 343: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 344: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 345: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 346: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 347: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 348: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 349: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 350: rustc_middle::ty::query::TyCtxtAt::type_of
             at src/librustc_middle/ty/query/plumbing.rs:467
 351: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::type_of
             at src/librustc_middle/ty/query/plumbing.rs:430
 352: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type::OpaqueTypeExpander::expand_opaque_ty
             at src/librustc_middle/ty/util.rs:584
 353: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type
             at src/librustc_middle/ty/util.rs:625
 354: rustc_typeck::check::check_opaque_for_cycles
             at src/librustc_typeck/check/mod.rs:1711
 355: rustc_typeck::check::check_opaque
             at src/librustc_typeck/check/mod.rs:1626
 356: rustc_typeck::check::check_item_type
             at src/librustc_typeck/check/mod.rs:1792
 357: <rustc_typeck::check::CheckItemTypesVisitor as rustc_hir::itemlikevisit::ItemLikeVisitor>::visit_item
             at src/librustc_typeck/check/mod.rs:735
 358: rustc_middle::hir::map::Map::visit_item_likes_in_module
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/hir/map/mod.rs:475
 359: rustc_typeck::check::check_mod_item_types
             at src/librustc_typeck/check/mod.rs:747
 360: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::check_mod_item_types>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 361: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 362: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:200
 363: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:593
 364: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 365: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 366: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 367: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 368: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 369: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 370: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 371: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 372: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 373: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 374: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 375: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 376: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 377: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 378: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 379: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 380: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 381: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 382: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 383: rustc_query_system::query::plumbing::ensure_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:661
 384: rustc_middle::ty::query::TyCtxtEnsure::check_mod_item_types
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:389
 385: rustc_typeck::check_crate::{{closure}}
             at src/librustc_typeck/lib.rs:361
 386: rustc_data_structures::profiling::VerboseTimingGuard::run
             at /mnt/code/fuchsia-rust/rust/src/librustc_data_structures/profiling.rs:573
 387: rustc_session::utils::<impl rustc_session::session::Session>::time
             at /mnt/code/fuchsia-rust/rust/src/librustc_session/utils.rs:9
 388: rustc_typeck::check_crate
             at src/librustc_typeck/lib.rs:359
 389: rustc_interface::passes::analysis
             at src/librustc_interface/passes.rs:809
 390: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:362
 391: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:303
 392: rustc_query_system::dep_graph::graph::DepGraph<K>::with_eval_always_task
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/dep_graph/graph.rs:336
 393: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:585
 394: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 395: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 396: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 397: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 398: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:71
 399: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1778
 400: rustc_middle::ty::context::tls::with_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 401: rustc_middle::ty::context::tls::with_context_opt
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1751
 402: rustc_middle::ty::context::tls::with_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1762
 403: rustc_middle::ty::context::tls::with_related_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1775
 404: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:60
 405: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:583
 406: rustc_query_system::query::plumbing::with_diagnostics
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:293
 407: rustc_query_system::query::plumbing::force_query_with_job
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:582
 408: rustc_query_system::query::plumbing::try_execute_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:410
 409: rustc_query_system::query::plumbing::get_query::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:627
 410: <rustc_query_system::query::caches::DefaultCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/caches.rs:91
 411: rustc_query_system::query::plumbing::try_get_cached
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:368
 412: rustc_query_system::query::plumbing::get_query
             at /mnt/code/fuchsia-rust/rust/src/librustc_query_system/query/plumbing.rs:619
 413: rustc_middle::ty::query::TyCtxtAt::analysis
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:467
 414: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::analysis
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/query/plumbing.rs:430
 415: rustc_driver::run_compiler::{{closure}}::{{closure}}::{{closure}}
             at src/librustc_driver/lib.rs:383
 416: rustc_middle::ty::context::tls::enter_global::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1713
 417: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 418: rustc_middle::ty::context::tls::set_tlv
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1674
 419: rustc_middle::ty::context::tls::enter_context
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1690
 420: rustc_middle::ty::context::tls::enter_global
             at /mnt/code/fuchsia-rust/rust/src/librustc_middle/ty/context.rs:1713
 421: rustc_interface::passes::QueryContext::enter
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/passes.rs:710
 422: rustc_driver::run_compiler::{{closure}}::{{closure}}
             at src/librustc_driver/lib.rs:383
 423: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/queries.rs:385
 424: rustc_driver::run_compiler::{{closure}}
             at src/librustc_driver/lib.rs:283
 425: rustc_interface::interface::run_compiler_in_existing_thread_pool
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/interface.rs:199
 426: rustc_interface::interface::run_compiler::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/interface.rs:213
 427: rustc_interface::util::spawn_thread_pool::{{closure}}::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/util.rs:152
 428: scoped_tls::ScopedKey<T>::set
             at /usr/local/google/home/tmandry/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137
 429: rustc_interface::util::spawn_thread_pool::{{closure}}::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/util.rs:148
 430: scoped_tls::ScopedKey<T>::set
             at /usr/local/google/home/tmandry/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137
 431: rustc_ast::attr::with_globals::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_ast/attr/mod.rs:44
 432: scoped_tls::ScopedKey<T>::set
             at /usr/local/google/home/tmandry/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137
 433: rustc_ast::attr::with_globals
             at /mnt/code/fuchsia-rust/rust/src/librustc_ast/attr/mod.rs:44
 434: rustc_interface::util::spawn_thread_pool::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/util.rs:147
 435: rustc_interface::util::scoped_thread::{{closure}}
             at /mnt/code/fuchsia-rust/rust/src/librustc_interface/util.rs:122
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.45.0-nightly (fa51f810e 2020-04-29) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z dep-info-omit-d-target -Z allow-features= -Z panic_abort_tests -C linker=/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/bin/lld -C link-arg=--sysroot=/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia -C link-arg=-L/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia/lib -C link-arg=-L/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/lib/clang/11.0.0/x86_64-fuchsia/lib -C link-arg=--pack-dyn-relocs=relr -C link-arg=-dynamic-linker=ld.so.1 -C link-arg=--icf=all -C force-frame-pointers -C debuginfo=2 -C opt-level=0 -C link-args=-zstack-size=0x200000 -C linker=/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/bin/lld -C link-arg=--sysroot=/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia -C link-arg=-L/mnt/code/fuchsia2/out/default/gen/build/config/fuchsia/lib -C link-arg=-L/mnt/code/fuchsia2/prebuilt/third_party/clang/linux-x64/lib/clang/11.0.0/x86_64-fuchsia/lib -C link-arg=--pack-dyn-relocs=relr -C link-arg=-dynamic-linker=ld.so.1 -C link-arg=--icf=all -C panic=abort -C link-arg=../../out/default.zircon/user-x64-clang.shlib/obj/system/ulib/syslog/libsyslog.so.debug --crate-type bin

query stack during panic:
#0 [mir_const_qualif] const checking `fidl::endpoints::ServiceMarker::NAME`
#1 [mir_built] building MIR for
#2 [unsafety_check_result] unsafety-checking `tests::display_tests::test_display_failure::func::{{closure}}#0::{{closure}}#0`
#3 [unsafety_check_result] unsafety-checking `tests::display_tests::test_display_failure::func::{{closure}}#0`
#4 [unsafety_check_result] unsafety-checking `tests::display_tests::test_display_failure::func`
#5 [mir_const] processing `tests::display_tests::test_display_failure::func`
#6 [mir_validated] processing `tests::display_tests::test_display_failure::func`
#7 [mir_borrowck] borrow-checking `tests::display_tests::test_display_failure::func`
#8 [type_of] processing `tests::display_tests::test_display_failure::func::{{opaque}}#0`
#9 [check_mod_item_types] checking item types in module `tests::display_tests`
#10 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

[tmandry]

Updated the issue description with a complete backtrace that has full line info (435 frames deep!)

[tmandry]

Update: I bisected this to 796c0ca (#67343)

cc @ecstatic-morse

[tmandry]

@ecstatic-morse, it looks like this match needs to be updated somehow:

rust/src/librustc_metadata/rmeta/decoder.rs

Lines 1122 to 1132 in d20113d

	fn mir_const_qualif(&self, id: DefIndex) -> mir::ConstQualifs {
	match self.kind(id) {
	EntryKind::Const(qualif, _)
	| EntryKind::AssocConst(
	AssocContainer::ImplDefault | AssocContainer::ImplFinal,
	qualif,
	_,
	) => qualif,
	_ => bug!(),
	}
	}

Does this bug report contain enough information to understand the problem, or do you need an MCVE?

[ecstatic-morse]

Could you reproduce but debug print the the scrutinee in the bug arm?

[ecstatic-morse]

I'm surprised since we should return before calling mir_const_qualif for all other types.

rust/src/librustc_mir_build/hair/pattern/mod.rs

Lines 768 to 773 in d20113d

	let (def_id, is_associated_const) = match res {
	Res::Def(DefKind::Const, def_id) => (def_id, false),
	Res::Def(DefKind::AssocConst, def_id) => (def_id, true),
	_ => return pat_from_kind(self.lower_variant_or_leaf(res, id, span, ty, vec![])),
	};

It must be one of the AssocContainer::Trait* variants. That means we're using the DefId of the associated const definition instead of the declaration. Maybe a defaulted associated const? I dunno.

[tmandry]

Indeed, here's the source for the item being checked (specifically, NAME):

  pub trait ServiceMarker: Sized + Send + Sync + 'static {
      /// The type of the structure against which FIDL requests are made.
      /// Queries made against the proxy are sent to the paired `ServerEnd`.
      type Proxy: Proxy<Service = Self>;

      /// The type of the stream of requests coming into a server.
      type RequestStream: RequestStream<Service = Self>;

      /// The name of the service suitable for debug purposes.
      ///
      /// This will be removed-- users should switch to either
      /// `DEBUG_NAME` or `DiscoverableService::NAME`.
      const NAME: &'static str = Self::DEBUG_NAME;

      /// The name of the service suitable for debug purposes.
      ///
      /// For discoverable services, this should be identical to
      /// `<Self as DiscoverableService>::NAME`.
      const DEBUG_NAME: &'static str;
  }

[ecstatic-morse]

Ah okay. We should already be encoding the ConstQualifs for associated type defaults. If so, just adding an | AssocContainer::TraitDefault would resolve the issue. I think I can synthesize a test case from here though, so don't worry about reducing further. Thanks for the help!

[tmandry]

No problem! Since I'd kicked this off already, here's the debug print:

AssocConst(TraitWithDefault, ConstQualifs { has_mut_interior: false, needs_drop: false, custom_eq: false }, Lazy { position: 222765, meta: (), _marker: PhantomData }