Closed
Description
The following ICE's in beta and nightly:
struct Bug {
a: [(); (|| { 0 })()]
}Backtrace:
Compiling playground v0.0.1 (/playground)
error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
--> src/lib.rs:2:13
|
2 | a: [(); (|| { 0 })()]
| ^^^^^^^^^^^^
error: internal compiler error: src/librustc_typeck/collect.rs:1969: to get the signature of a closure, use `closure_sig()` not `fn_sig()`
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:882:9
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:77
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:1052
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1426
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:204
9: std::panicking::default_hook
at src/libstd/panicking.rs:224
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:476
12: std::panicking::begin_panic
13: rustc_errors::HandlerInner::bug
14: rustc_errors::Handler::bug
15: rustc::util::bug::opt_span_bug_fmt::{{closure}}
16: rustc::ty::context::tls::with_opt::{{closure}}
17: rustc::ty::context::tls::with_opt
18: rustc::util::bug::opt_span_bug_fmt
19: rustc::util::bug::bug_fmt
20: rustc_typeck::collect::fn_sig
21: rustc::ty::query::__query_compute::fn_sig
22: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
23: rustc_mir::const_eval::fn_queries::provide::is_const_fn_raw
24: rustc::ty::query::__query_compute::is_const_fn_raw
25: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
26: <rustc_mir::const_eval::machine::CompileTimeInterpreter as rustc_mir::interpret::machine::Machine>::find_mir_or_eval_fn
27: rustc_mir::interpret::terminator::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::eval_fn_call
28: rustc_mir::interpret::step::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::step
29: rustc_mir::const_eval::eval_queries::const_eval_raw_provider
30: rustc::ty::query::__query_compute::const_eval_raw
31: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
32: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
33: rustc::ty::query::__query_compute::const_eval_validated
34: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
35: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
36: rustc::ty::query::__query_compute::const_eval_validated
37: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::const_eval_validated>::compute
38: rustc::dep_graph::graph::DepGraph::with_task_impl
39: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
40: rustc::mir::interpret::queries::<impl rustc::ty::context::TyCtxt>::const_eval_instance
41: rustc::mir::interpret::queries::<impl rustc::ty::context::TyCtxt>::const_eval_resolve
42: <rustc::traits::project::AssocTypeNormalizer as rustc::ty::fold::TypeFolder>::fold_const
43: rustc::ty::structural_impls::<impl rustc::ty::fold::TypeFoldable for &rustc::ty::TyS>::super_fold_with
44: <rustc::traits::project::AssocTypeNormalizer as rustc::ty::fold::TypeFolder>::fold_ty
45: rustc::traits::project::normalize
46: rustc_typeck::check::FnCtxt::normalize_associated_types_in
47: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
48: rustc::ty::context::GlobalCtxt::enter_local
49: rustc_typeck::check::wfcheck::check_item_well_formed
50: rustc::ty::query::__query_compute::check_item_well_formed
51: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::check_item_well_formed>::compute
52: rustc::dep_graph::graph::DepGraph::with_task_impl
53: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
54: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::ensure_query
55: __rust_maybe_catch_panic
at src/libpanic_unwind/lib.rs:86
56: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
57: __rust_maybe_catch_panic
at src/libpanic_unwind/lib.rs:86
58: rustc_hir::hir::Crate::par_visit_all_item_likes
59: rustc_typeck::check_crate
60: rustc_interface::passes::analysis
61: rustc::ty::query::__query_compute::analysis
62: rustc::dep_graph::graph::DepGraph::with_task_impl
63: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
64: rustc::ty::context::tls::enter_global
65: rustc_interface::interface::run_compiler_in_existing_thread_pool
66: scoped_tls::ScopedKey<T>::set
67: syntax::with_globals
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 1.42.0-nightly (c2d141df5 2020-01-24) running on x86_64-unknown-linux-gnu
note: compiler flags: -C opt-level=3 -C codegen-units=1 --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [fn_sig] processing `Bug::a::{{constant}}#0::{{closure}}#0`
#1 [is_const_fn_raw] checking if item is const fn: `Bug::a::{{constant}}#0::{{closure}}#0`
#2 [const_eval_raw] const-evaluating `Bug::a::{{constant}}#0`
#3 [const_eval_validated] const-evaluating + checking `Bug::a::{{constant}}#0`
#4 [const_eval_validated] const-evaluating + checking `Bug::a::{{constant}}#0`
#5 [check_item_well_formed] processing `Bug`
#6 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0015`.
error: could not compile `playground`.
To learn more, run the command again with --verbose.