Closed
Description
Found via this crater experiment: https://crater.rust-lang.org/ex/pr-56550
cargo new crashtest
cd crashtest
echo "eclectic = \"0.11.0\"" >> Cargo.toml
RUST_BACKTRACE=Full cargo check
Checking eclectic v0.11.0
error: internal compiler error: src/librustc/infer/freshen.rs:165: Encountered a freshend type with id 0 but our counter is only at 0
thread 'main' panicked at 'Box<Any>', src/librustc_errors/lib.rs:600:9
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
1: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:71
2: std::panicking::default_hook::{{closure}}
at src/libstd/sys_common/backtrace.rs:59
at src/libstd/panicking.rs:210
3: std::panicking::default_hook
at src/libstd/panicking.rs:225
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:492
6: std::panicking::begin_panic
7: rustc_errors::Handler::bug
8: rustc::util::bug::opt_span_bug_fmt::{{closure}}
9: rustc::ty::context::tls::with_opt::{{closure}}
10: rustc::ty::context::tls::with_context_opt
11: rustc::ty::context::tls::with_opt
12: rustc::util::bug::opt_span_bug_fmt
13: rustc::util::bug::bug_fmt
14: <rustc::infer::freshen::TypeFreshener<'a, 'gcx, 'tcx> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty
15: <smallvec::SmallVec<A> as core::iter::traits::FromIterator<<A as smallvec::Array>::Item>>::from_iter
16: rustc::ty::fold::TypeFoldable::fold_with
17: rustc::traits::select::SelectionContext::select
18: rustc::infer::InferCtxt::commit_if_ok
19: rustc::traits::project::opt_normalize_projection_type
20: rustc::traits::project::normalize_projection_type
21: <rustc::traits::project::AssociatedTypeNormalizer<'a, 'b, 'gcx, 'tcx> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty
22: <smallvec::SmallVec<A> as core::iter::traits::FromIterator<<A as smallvec::Array>::Item>>::from_iter
23: rustc::ty::fold::TypeFoldable::fold_with
24: rustc::ty::structural_impls::<impl rustc::ty::fold::TypeFoldable<'tcx> for &'tcx rustc::ty::TyS<'tcx>>::super_fold_with
25: <rustc::traits::project::AssociatedTypeNormalizer<'a, 'b, 'gcx, 'tcx> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty
26: <smallvec::SmallVec<A> as core::iter::traits::FromIterator<<A as smallvec::Array>::Item>>::from_iter
27: rustc::ty::fold::TypeFoldable::fold_with
28: rustc::ty::structural_impls::<impl rustc::ty::fold::TypeFoldable<'tcx> for &'tcx rustc::ty::TyS<'tcx>>::super_fold_with
29: <rustc::traits::project::AssociatedTypeNormalizer<'a, 'b, 'gcx, 'tcx> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty
30: rustc::ty::fold::TypeFoldable::fold_with
31: rustc::ty::fold::TypeFoldable::fold_with
32: rustc::traits::project::normalize
33: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once
34: <core::iter::FlatMap<I, U, F> as core::iter::iterator::Iterator>::next
35: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
36: rustc::ty::wf::WfPredicates::normalize
37: rustc::ty::wf::obligations
38: <rustc_data_structures::obligation_forest::ObligationForest<O>>::process_obligations
39: <rustc::traits::fulfill::FulfillmentContext<'tcx> as rustc::traits::engine::TraitEngine<'tcx>>::select_where_possible
40: rustc_typeck::check::FnCtxt::select_obligations_where_possible
41: rustc::ty::context::tls::with_related_context
42: rustc::infer::InferCtxtBuilder::enter
43: rustc_typeck::check::typeck_tables_of
44: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_tables_of<'tcx>>::compute
45: rustc::dep_graph::graph::DepGraph::with_task_impl
46: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
47: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
48: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
49: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::ensure_query
50: rustc::session::Session::track_errors
51: rustc_typeck::check::typeck_item_bodies
52: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_item_bodies<'tcx>>::compute
53: rustc::dep_graph::graph::DepGraph::with_task_impl
54: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
55: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
56: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
57: rustc::util::common::time
58: rustc_typeck::check_crate
59: rustc::ty::context::tls::enter_context
60: <std::thread::local::LocalKey<T>>::with
61: rustc::ty::context::TyCtxt::create_and_enter
62: rustc_driver::driver::compile_input
63: rustc_driver::run_compiler_with_pool
64: <scoped_tls::ScopedKey<T>>::set
65: rustc_driver::run_compiler
66: rustc_driver::monitor::{{closure}}
67: __rust_maybe_catch_panic
at src/libpanic_unwind/lib.rs:102
68: rustc_driver::run
69: rustc_driver::main
70: std::rt::lang_start::{{closure}}
71: std::panicking::try::do_call
at src/libstd/rt.rs:59
at src/libstd/panicking.rs:307
72: __rust_maybe_catch_panic
at src/libpanic_unwind/lib.rs:102
73: std::rt::lang_start_internal
at src/libstd/panicking.rs:286
at src/libstd/panic.rs:398
at src/libstd/rt.rs:58
74: main
75: __libc_start_main
76: <unknown>
query stack during panic:
#0 [typeck_tables_of] processing `assert_object_safe`
#1 [typeck_item_bodies] type-checking all item bodies
end of query stack
error: aborting due to previous error
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 1.33.0-nightly (96d1334e5 2018-12-14) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C target-cpu=native --crate-type lib
note: some of the compiler flags provided by cargo are hidden
error: Could not compile `eclectic`.
To learn more, run the command again with --verbose.
rustc 1.33.0-nightly (96d1334e5 2018-12-14)
binary: rustc
commit-hash: 96d1334e567237b1507cd277938e7ae2de75ff51
commit-date: 2018-12-14
host: x86_64-unknown-linux-gnu
release: 1.33.0-nightly
LLVM version: 8.0