ice: `type mismatching when copying!`

[matthiaskrgr]

Code

pub struct Opcode(pub u8);

pub struct Opcode2(&'a S);

impl Opcode2 {
    pub const OP2: Opcode2 = Opcode2(Opcode(0x1));
}

pub fn example2(msg_type: Opcode2) -> impl FnMut(&[u8]) {
    move |i| match msg_type {
        Opcode2::OP2 => unimplemented!(),
    }
}

Meta

rustc --version --verbose:

rustc 1.72.0-nightly (2d0aa5768 2023-06-18)
binary: rustc
commit-hash: 2d0aa57684e10f7b3d3fe740ee18d431181583ad
commit-date: 2023-06-18
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.5

Error output

error[E0261]: use of undeclared lifetime name `'a`
 --> treereduce.out:3:21
  |
3 | pub struct Opcode2(&'a S);
  |                   - ^^ undeclared lifetime
  |                   |
  |                   help: consider introducing lifetime `'a` here: `<'a>`

error[E0412]: cannot find type `S` in this scope
 --> treereduce.out:3:24
  |
3 | pub struct Opcode2(&'a S);
  |                        ^ not found in this scope
  |
help: you might be missing a type parameter
  |
3 | pub struct Opcode2<S>(&'a S);
  |                   +++

error[E0601]: `main` function not found in crate `treereduce`
  --> treereduce.out:13:2
   |
13 | }
   |  ^ consider adding a `main` function to `treereduce.out`

Backtrace

error: internal compiler error: /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/compiler/rustc_const_eval/src/interpret/place.rs:644:13: type mismatch when copying!
                                src: Opcode,
                                dest: &{type error}
 --> treereduce.out:6:30
  |
6 |     pub const OP2: Opcode2 = Opcode2(Opcode(0x1));
  |                              ^^^^^^^^^^^^^^^^^^^^

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/compiler/rustc_errors/src/lib.rs:994:33
stack backtrace:
   0:     0x7f787d967e11 - std::backtrace_rs::backtrace::libunwind::trace::h184786643c1f8146
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f787d967e11 - std::backtrace_rs::backtrace::trace_unsynchronized::h10cef21dd42edd42
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f787d967e11 - std::sys_common::backtrace::_print_fmt::hca8722c6f82eccd9
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f787d967e11 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4b170c65cdf95c48
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f787d9c94bf - core::fmt::rt::Argument::fmt::h7e50834cab28e102
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/core/src/fmt/rt.rs:138:9
   5:     0x7f787d9c94bf - core::fmt::write::h8bd64fe81f89dd81
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f787d95a977 - std::io::Write::write_fmt::hc75a842b3ecac8bc
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/io/mod.rs:1714:15
   7:     0x7f787d967c25 - std::sys_common::backtrace::_print::hdb7a31bd8c54eb49
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f787d967c25 - std::sys_common::backtrace::print::hbcf968a4222dc0b5
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f787d96a9d3 - std::panicking::default_hook::{{closure}}::h02987b13cfa1387d
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/panicking.rs:269:22
  10:     0x7f787d96a764 - std::panicking::default_hook::hcb3fd44404995c49
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/panicking.rs:288:9
  11:     0x7f7880babd6b - <rustc_driver_impl[7175fdba515aac6e]::install_ice_hook::{closure#0} as core[baaa20f768102eef]::ops::function::FnOnce<(&core[baaa20f768102eef]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7f787d96b1fe - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hec1e31de726d1657
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/alloc/src/boxed.rs:2007:9
  13:     0x7f787d96b1fe - std::panicking::rust_panic_with_hook::h223f39091438ac61
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/panicking.rs:709:13
  14:     0x7f7881241861 - std[755122e38bdf80bb]::panicking::begin_panic::<rustc_errors[22c53a0383ffa2c9]::ExplicitBug>::{closure#0}
  15:     0x7f78812400d6 - std[755122e38bdf80bb]::sys_common::backtrace::__rust_end_short_backtrace::<std[755122e38bdf80bb]::panicking::begin_panic<rustc_errors[22c53a0383ffa2c9]::ExplicitBug>::{closure#0}, !>
  16:     0x7f78812555b6 - std[755122e38bdf80bb]::panicking::begin_panic::<rustc_errors[22c53a0383ffa2c9]::ExplicitBug>
  17:     0x7f78812f431e - <rustc_errors[22c53a0383ffa2c9]::HandlerInner>::span_bug::<rustc_span[1e0547ff349d1bca]::span_encoding::Span, alloc[d1ea88cdd25af2a4]::string::String>
  18:     0x7f78812f41ad - <rustc_errors[22c53a0383ffa2c9]::Handler>::span_bug::<rustc_span[1e0547ff349d1bca]::span_encoding::Span, alloc[d1ea88cdd25af2a4]::string::String>
  19:     0x7f788125a0d6 - rustc_middle[56c503886228b671]::util::bug::opt_span_bug_fmt::<rustc_span[1e0547ff349d1bca]::span_encoding::Span>::{closure#0}
  20:     0x7f788125a10a - rustc_middle[56c503886228b671]::ty::context::tls::with_opt::<rustc_middle[56c503886228b671]::util::bug::opt_span_bug_fmt<rustc_span[1e0547ff349d1bca]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f788125782a - rustc_middle[56c503886228b671]::ty::context::tls::with_context_opt::<rustc_middle[56c503886228b671]::ty::context::tls::with_opt<rustc_middle[56c503886228b671]::util::bug::opt_span_bug_fmt<rustc_span[1e0547ff349d1bca]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f787fbb2944 - rustc_middle[56c503886228b671]::util::bug::span_bug_fmt::<rustc_span[1e0547ff349d1bca]::span_encoding::Span>
  23:     0x7f787fb95c71 - <rustc_const_eval[312f54f1179d9c1]::interpret::eval_context::InterpCx<rustc_mir_transform[eaefbefc809602b3]::const_prop::ConstPropMachine>>::eval_rvalue_into_place
  24:     0x7f787fb836e0 - <rustc_mir_transform[eaefbefc809602b3]::const_prop_lint::ConstPropagator as rustc_middle[56c503886228b671]::mir::visit::Visitor>::visit_basic_block_data
  25:     0x7f787fb7a99f - <rustc_mir_transform[eaefbefc809602b3]::const_prop_lint::ConstProp as rustc_mir_transform[eaefbefc809602b3]::pass_manager::MirLint>::run_lint
  26:     0x7f787f1fc946 - rustc_mir_transform[eaefbefc809602b3]::run_analysis_to_runtime_passes
  27:     0x7f787f1f80f5 - rustc_mir_transform[eaefbefc809602b3]::mir_drops_elaborated_and_const_checked
  28:     0x7f787ec3dcee - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  29:     0x7f787ec3dcbe - <rustc_query_impl[e44c98b80a645267]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  30:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  31:     0x7f78805171ff - rustc_query_impl[e44c98b80a645267]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  32:     0x7f787fe4d793 - rustc_mir_transform[eaefbefc809602b3]::mir_for_ctfe
  33:     0x7f787ec69406 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_for_ctfe::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  34:     0x7f787ec693e1 - <rustc_query_impl[e44c98b80a645267]::query_impl::mir_for_ctfe::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::DefId)>>::call_once
  35:     0x7f787ec0cb35 - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_span[1e0547ff349d1bca]::def_id::DefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  36:     0x7f7880517302 - rustc_query_impl[e44c98b80a645267]::query_impl::mir_for_ctfe::get_query_non_incr::__rust_end_short_backtrace
  37:     0x7f787f05e8df - <rustc_const_eval[312f54f1179d9c1]::interpret::eval_context::InterpCx<rustc_const_eval[312f54f1179d9c1]::const_eval::machine::CompileTimeInterpreter>>::load_mir
  38:     0x7f787efa70a9 - rustc_const_eval[312f54f1179d9c1]::const_eval::eval_queries::eval_to_allocation_raw_provider
  39:     0x7f787ec5f3d7 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>
  40:     0x7f787f6f334c - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  41:     0x7f787f6f301b - rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  42:     0x7f787efa76f6 - rustc_const_eval[312f54f1179d9c1]::const_eval::eval_queries::eval_to_allocation_raw_provider
  43:     0x7f787ec5f3d7 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>
  44:     0x7f787f6f334c - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  45:     0x7f787f6f301b - rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  46:     0x7f78802f49ef - rustc_const_eval[312f54f1179d9c1]::const_eval::eval_to_valtree
  47:     0x7f78802f4880 - <rustc_const_eval[312f54f1179d9c1]::provide::{closure#0} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>)>>::call_once
  48:     0x7f787ff498f9 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_valtree::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 24usize]>>
  49:     0x7f787ff498a8 - <rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_valtree::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>)>>::call_once
  50:     0x7f788018b688 - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  51:     0x7f788018b37b - rustc_query_impl[e44c98b80a645267]::query_impl::eval_to_valtree::get_query_non_incr::__rust_end_short_backtrace
  52:     0x7f787f29f6fc - rustc_middle[56c503886228b671]::query::plumbing::query_get_at::<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_middle[56c503886228b671]::ty::ParamEnvAnd<rustc_middle[56c503886228b671]::mir::interpret::GlobalId>, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 24usize]>>>
  53:     0x7f787f29f403 - <rustc_middle[56c503886228b671]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  54:     0x7f787fa00570 - <rustc_mir_build[b29744f53d851e13]::thir::pattern::PatCtxt>::lower_path
  55:     0x7f787f9fc6a8 - <rustc_mir_build[b29744f53d851e13]::thir::pattern::PatCtxt>::lower_pattern
  56:     0x7f787f9fb8ed - <core[baaa20f768102eef]::iter::adapters::map::Map<core[baaa20f768102eef]::slice::iter::Iter<rustc_hir[51d35b3e8e0cb049]::hir::Arm>, <rustc_mir_build[b29744f53d851e13]::thir::cx::Cx>::make_mirror_unadjusted::{closure#0}::{closure#14}> as core[baaa20f768102eef]::iter::traits::iterator::Iterator>::fold::<(), core[baaa20f768102eef]::iter::traits::iterator::Iterator::for_each::call<rustc_middle[56c503886228b671]::thir::ArmId, <alloc[d1ea88cdd25af2a4]::vec::Vec<rustc_middle[56c503886228b671]::thir::ArmId>>::extend_trusted<core[baaa20f768102eef]::iter::adapters::map::Map<core[baaa20f768102eef]::slice::iter::Iter<rustc_hir[51d35b3e8e0cb049]::hir::Arm>, <rustc_mir_build[b29744f53d851e13]::thir::cx::Cx>::make_mirror_unadjusted::{closure#0}::{closure#14}>>::{closure#0}>::{closure#0}>
  57:     0x7f787f1caa84 - <rustc_mir_build[b29744f53d851e13]::thir::cx::Cx>::make_mirror_unadjusted::{closure#0}
  58:     0x7f787f1c7342 - <rustc_mir_build[b29744f53d851e13]::thir::cx::Cx>::mirror_expr
  59:     0x7f787f4fbded - rustc_mir_build[b29744f53d851e13]::thir::cx::thir_body
  60:     0x7f787ec04f01 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::thir_body::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>
  61:     0x7f787f471ecb - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  62:     0x7f787f471bf5 - rustc_query_impl[e44c98b80a645267]::query_impl::thir_body::get_query_non_incr::__rust_end_short_backtrace
  63:     0x7f78803d6b04 - rustc_mir_build[b29744f53d851e13]::thir::pattern::check_match::check_match
  64:     0x7f787ebe16ac - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::check_match::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 1usize]>>
  65:     0x7f787f24e61f - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  66:     0x7f787f24e342 - rustc_query_impl[e44c98b80a645267]::query_impl::check_match::get_query_non_incr::__rust_end_short_backtrace
  67:     0x7f787fb6166f - rustc_mir_build[b29744f53d851e13]::build::mir_built
  68:     0x7f787ec0588c - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  69:     0x7f787ec0586e - <rustc_query_impl[e44c98b80a645267]::query_impl::mir_built::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  70:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  71:     0x7f7880516f0f - rustc_query_impl[e44c98b80a645267]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  72:     0x7f787fd44544 - rustc_mir_transform[eaefbefc809602b3]::check_unsafety::unsafety_check_result
  73:     0x7f787ec058cc - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  74:     0x7f787ec058ae - <rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  75:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  76:     0x7f7880518baf - rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::get_query_non_incr::__rust_end_short_backtrace
  77:     0x7f787fd47a50 - rustc_mir_transform[eaefbefc809602b3]::check_unsafety::unsafety_check_result
  78:     0x7f787ec058cc - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  79:     0x7f787ec058ae - <rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  80:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  81:     0x7f7880518baf - rustc_query_impl[e44c98b80a645267]::query_impl::unsafety_check_result::get_query_non_incr::__rust_end_short_backtrace
  82:     0x7f787fe96c24 - rustc_mir_transform[eaefbefc809602b3]::mir_const
  83:     0x7f787ec1264e - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  84:     0x7f787ec1261e - <rustc_query_impl[e44c98b80a645267]::query_impl::mir_const::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  85:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  86:     0x7f7880516fff - rustc_query_impl[e44c98b80a645267]::query_impl::mir_const::get_query_non_incr::__rust_end_short_backtrace
  87:     0x7f787ef3013b - rustc_mir_transform[eaefbefc809602b3]::mir_promoted
  88:     0x7f787ec05921 - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>
  89:     0x7f787f471efa - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  90:     0x7f78805173f5 - rustc_query_impl[e44c98b80a645267]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  91:     0x7f787fa1c37c - rustc_borrowck[cf2d7fd60d38cc0f]::mir_borrowck
  92:     0x7f787ec125ee - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  93:     0x7f787ec125be - <rustc_query_impl[e44c98b80a645267]::query_impl::mir_borrowck::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
  94:     0x7f787ecd14cd - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
  95:     0x7f78805197ff - rustc_query_impl[e44c98b80a645267]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  96:     0x7f787fd53ee5 - rustc_hir_analysis[eb0d24a920376e7]::collect::type_of::opaque::find_opaque_ty_constraints_for_rpit
  97:     0x7f787fd50fef - rustc_hir_analysis[eb0d24a920376e7]::collect::type_of::type_of
  98:     0x7f787ed2635e - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>
  99:     0x7f787ed26090 - <rustc_query_impl[e44c98b80a645267]::query_impl::type_of::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::DefId)>>::call_once
 100:     0x7f787ec0cb35 - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_span[1e0547ff349d1bca]::def_id::DefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
 101:     0x7f7880516421 - rustc_query_impl[e44c98b80a645267]::query_impl::type_of::get_query_non_incr::__rust_end_short_backtrace
 102:     0x7f787fc94e66 - rustc_middle[56c503886228b671]::query::plumbing::query_get_at::<rustc_query_system[ba457099f14053e9]::query::caches::DefaultCache<rustc_span[1e0547ff349d1bca]::def_id::DefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 8usize]>>>
 103:     0x7f787fc8cdcf - rustc_hir_analysis[eb0d24a920376e7]::check::check::check_mod_item_types
 104:     0x7f787f81438c - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 0usize]>>
 105:     0x7f787f81436e - <rustc_query_impl[e44c98b80a645267]::query_impl::check_mod_item_types::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, rustc_span[1e0547ff349d1bca]::def_id::LocalDefId)>>::call_once
 106:     0x7f787f24397f - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::VecCache<rustc_span[1e0547ff349d1bca]::def_id::LocalDefId, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
 107:     0x7f7880521b92 - rustc_query_impl[e44c98b80a645267]::query_impl::check_mod_item_types::get_query_non_incr::__rust_end_short_backtrace
 108:     0x7f787ffc1187 - <rustc_middle[56c503886228b671]::hir::map::Map>::for_each_module::<rustc_hir_analysis[eb0d24a920376e7]::check_crate::{closure#6}::{closure#0}>
 109:     0x7f787ffc099d - <rustc_session[ebb9057f9195e4cc]::session::Session>::time::<(), rustc_hir_analysis[eb0d24a920376e7]::check_crate::{closure#6}>
 110:     0x7f787ffbee67 - rustc_hir_analysis[eb0d24a920376e7]::check_crate
 111:     0x7f787ffb280a - rustc_interface[e3841d12b9b221e7]::passes::analysis
 112:     0x7f788002350a - rustc_query_impl[e44c98b80a645267]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e44c98b80a645267]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 1usize]>>
 113:     0x7f78800234f9 - <rustc_query_impl[e44c98b80a645267]::query_impl::analysis::dynamic_query::{closure#2} as core[baaa20f768102eef]::ops::function::FnOnce<(rustc_middle[56c503886228b671]::ty::context::TyCtxt, ())>>::call_once
 114:     0x7f788023f0f8 - rustc_query_system[ba457099f14053e9]::query::plumbing::try_execute_query::<rustc_query_impl[e44c98b80a645267]::DynamicConfig<rustc_query_system[ba457099f14053e9]::query::caches::SingleCache<rustc_middle[56c503886228b671]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e44c98b80a645267]::plumbing::QueryCtxt, false>
 115:     0x7f788023eed7 - rustc_query_impl[e44c98b80a645267]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
 116:     0x7f78800d6115 - <rustc_middle[56c503886228b671]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[7175fdba515aac6e]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>
 117:     0x7f78800d57bc - <rustc_interface[e3841d12b9b221e7]::interface::Compiler>::enter::<rustc_driver_impl[7175fdba515aac6e]::run_compiler::{closure#1}::{closure#2}, core[baaa20f768102eef]::result::Result<core[baaa20f768102eef]::option::Option<rustc_interface[e3841d12b9b221e7]::queries::Linker>, rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>
 118:     0x7f78800d2e21 - std[755122e38bdf80bb]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[e3841d12b9b221e7]::util::run_in_thread_pool_with_globals<rustc_interface[e3841d12b9b221e7]::interface::run_compiler<core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>, rustc_driver_impl[7175fdba515aac6e]::run_compiler::{closure#1}>::{closure#0}, core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>
 119:     0x7f78800d25a5 - <<std[755122e38bdf80bb]::thread::Builder>::spawn_unchecked_<rustc_interface[e3841d12b9b221e7]::util::run_in_thread_pool_with_globals<rustc_interface[e3841d12b9b221e7]::interface::run_compiler<core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>, rustc_driver_impl[7175fdba515aac6e]::run_compiler::{closure#1}>::{closure#0}, core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[baaa20f768102eef]::result::Result<(), rustc_span[1e0547ff349d1bca]::ErrorGuaranteed>>::{closure#1} as core[baaa20f768102eef]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 120:     0x7f787d975685 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h59d6baf462325ed4
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/alloc/src/boxed.rs:1993:9
 121:     0x7f787d975685 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4eca0dd82537346f
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/alloc/src/boxed.rs:1993:9
 122:     0x7f787d975685 - std::sys::unix::thread::Thread::new::thread_start::h38e13b8ca4256fdb
                               at /rustc/2d0aa57684e10f7b3d3fe740ee18d431181583ad/library/std/src/sys/unix/thread.rs:108:17
 123:     0x7f787d70344b - <unknown>
 124:     0x7f787d786e40 - <unknown>
 125:                0x0 - <unknown>

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.72.0-nightly (2d0aa5768 2023-06-18) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `<impl at treereduce.out:5:1: 5:13>::OP2`
#1 [mir_for_ctfe] caching mir of `<impl at treereduce.out:5:1: 5:13>::OP2` for CTFE
#2 [eval_to_allocation_raw] const-evaluating + checking `<impl at treereduce.out:5:1: 5:13>::OP2`
#3 [eval_to_allocation_raw] const-evaluating + checking `<impl at treereduce.out:5:1: 5:13>::OP2`
#4 [eval_to_valtree] evaluating type-level constant
#5 [thir_body] building THIR for `example2::{closure#0}`
#6 [check_match] match-checking `example2::{closure#0}`
#7 [mir_built] building MIR for `example2::{closure#0}`
#8 [unsafety_check_result] unsafety-checking `example2::{closure#0}`
#9 [unsafety_check_result] unsafety-checking `example2`
#10 [mir_const] preparing `example2` for borrow checking
#11 [mir_promoted] promoting constants in MIR for `example2`
#12 [mir_borrowck] borrow-checking `example2`
#13 [type_of] computing type of `example2::{opaque#0}`
#14 [check_mod_item_types] checking item types in top-level module
#15 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 4 previous errors

Some errors have detailed explanations: E0261, E0412, E0601.
For more information about an error, try `rustc --explain E0261`.

[matthiaskrgr]

Regression in nightly-2022-04-18

  commit[0] 2022-04-16: Auto merge of #96123 - Dylan-DPC:rollup-qjog6n1, r=Dylan-DPC
  commit[1] 2022-04-16: Auto merge of #95899 - petrochenkov:modchild2, r=cjgillot
  commit[2] 2022-04-17: Auto merge of #96134 - Dylan-DPC:rollup-ejug3yq, r=Dylan-DPC
  commit[3] 2022-04-17: Auto merge of #96002 - nnethercote:speed-up-Vec-clear-2, r=m-ou-se
  commit[4] 2022-04-17: Auto merge of #96010 - eduardosm:Unique-on-top-of-NonNull, r=m-ou-se,tmiasko
  commit[5] 2022-04-17: Auto merge of #95655 - kckeiks:create-hir-crate-items-query, r=cjgillot
  commit[6] 2022-04-17: Auto merge of #96016 - Aaron1011:hash-name-cleanup, r=cjgillot
  commit[7] 2022-04-17: Auto merge of #95779 - cjgillot:ast-lifetimes-undeclared, r=petrochenkov
  commit[8] 2022-04-17: Auto merge of #96091 - GuillaumeGomez:duplicated-blanket-impls, r=notriddle
  commit[9] 2022-04-17: Auto merge of #96139 - erikdesjardins:revertinl2, r=Mark-Simulacrum

[JohnTitor]

Fixed on the latest nightly, marking as E-needs-test (or, feel free to close if we have a sufficient regression test)
@rustbot labels: +E-needs-test