Closed
Description
Code
rustc -Zdump-mir=all late-bound-regions.rs
#![feature(inherent_associated_types)]
type Function = for<'a> fn(&'a i32) -> S<'a>::P;
struct S<'a>(&'a ());
impl<'a> S<'a> {
type P = &'a i32;
}
fn ret_ref_local<'e>() -> &'e i32 {
let f: Function = |x| x;
let local = 0;
f(&local)
}
fn main() {}Meta
rustc --version --verbose:
rustc 1.71.0-nightly (2f2c438dc 2023-05-08)
binary: rustc
commit-hash: 2f2c438dce75d8cc532c3baa849eeddc0901802c
commit-date: 2023-05-08
host: x86_64-unknown-linux-gnu
release: 1.71.0-nightly
LLVM version: 16.0.2
Error output
<output>
Backtrace
error: internal compiler error: compiler/rustc_middle/src/ty/subst.rs:810:13: Unexpected parameter Type(S<'a>) when substituting in region 'a (index=0)
thread 'rustc' panicked at 'Box<dyn Any>', /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/compiler/rustc_errors/src/lib.rs:1650:9
stack backtrace:
0: 0x7ff285946361 - std::backtrace_rs::backtrace::libunwind::trace::he9e9030cf5bcddaa
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7ff285946361 - std::backtrace_rs::backtrace::trace_unsynchronized::hb5e44a77ff0586eb
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7ff285946361 - std::sys_common::backtrace::_print_fmt::h38e8723c5d83f22f
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7ff285946361 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5e394c4b1f1cb045
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7ff2859a66ff - core::fmt::rt::Argument::fmt::ha5dde4cb71578cc2
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/rt.rs:138:9
5: 0x7ff2859a66ff - core::fmt::write::hb1413899fd777907
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/mod.rs:1094:21
6: 0x7ff2859395c1 - std::io::Write::write_fmt::h08b4eac68313bb0d
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/io/mod.rs:1712:15
7: 0x7ff285946175 - std::sys_common::backtrace::_print::h2bb25f41b1777226
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7ff285946175 - std::sys_common::backtrace::print::ha21981aa5a1c5802
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7ff285948e07 - std::panicking::default_hook::{{closure}}::h603ce04329232051
10: 0x7ff285948bf4 - std::panicking::default_hook::hd4285764fbdb24e1
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/panicking.rs:288:9
11: 0x7ff2847bf94b - <rustc_driver_impl[27c68de0ac55b06a]::install_ice_hook::{closure#0} as core[3afeaedfb140cde7]::ops::function::FnOnce<(&core[3afeaedfb140cde7]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
12: 0x7ff285949527 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h401f21a7538313bc
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/alloc/src/boxed.rs:1999:9
13: 0x7ff285949527 - std::panicking::rust_panic_with_hook::h2322eda2481f33bc
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/panicking.rs:695:13
14: 0x7ff284cae031 - std[53b54636b4f52653]::panicking::begin_panic::<rustc_errors[2afb0e2cc7c4c42d]::ExplicitBug>::{closure#0}
15: 0x7ff284caa7e6 - std[53b54636b4f52653]::sys_common::backtrace::__rust_end_short_backtrace::<std[53b54636b4f52653]::panicking::begin_panic<rustc_errors[2afb0e2cc7c4c42d]::ExplicitBug>::{closure#0}, !>
16: 0x7ff284caa6d6 - std[53b54636b4f52653]::panicking::begin_panic::<rustc_errors[2afb0e2cc7c4c42d]::ExplicitBug>
17: 0x7ff284ca5264 - <rustc_errors[2afb0e2cc7c4c42d]::HandlerInner>::bug::<alloc[a4f318becb59a05]::string::String>
18: 0x7ff284ca4d76 - <rustc_errors[2afb0e2cc7c4c42d]::Handler>::bug::<alloc[a4f318becb59a05]::string::String>
19: 0x7ff284d31bac - rustc_middle[232bd29a687eeda3]::util::bug::opt_span_bug_fmt::<rustc_span[811089187935bcb6]::span_encoding::Span>::{closure#0}
20: 0x7ff284d3137a - rustc_middle[232bd29a687eeda3]::ty::context::tls::with_opt::<rustc_middle[232bd29a687eeda3]::util::bug::opt_span_bug_fmt<rustc_span[811089187935bcb6]::span_encoding::Span>::{closure#0}, !>::{closure#0}
21: 0x7ff284d3134a - rustc_middle[232bd29a687eeda3]::ty::context::tls::with_context_opt::<rustc_middle[232bd29a687eeda3]::ty::context::tls::with_opt<rustc_middle[232bd29a687eeda3]::util::bug::opt_span_bug_fmt<rustc_span[811089187935bcb6]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
22: 0x7ff2829c8f8d - rustc_middle[232bd29a687eeda3]::util::bug::bug_fmt
23: 0x7ff284cb7731 - <rustc_middle[232bd29a687eeda3]::ty::subst::SubstFolder as rustc_type_ir[cc09a4b81b2ca552]::fold::TypeFolder<rustc_middle[232bd29a687eeda3]::ty::context::TyCtxt>>::fold_region::region_param_invalid
24: 0x7ff2827ae0c9 - <rustc_middle[232bd29a687eeda3]::ty::subst::GenericArg as rustc_type_ir[cc09a4b81b2ca552]::fold::TypeFoldable<rustc_middle[232bd29a687eeda3]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[232bd29a687eeda3]::ty::subst::SubstFolder>
25: 0x7ff2827abe46 - <rustc_middle[232bd29a687eeda3]::ty::Ty as rustc_type_ir[cc09a4b81b2ca552]::fold::TypeSuperFoldable<rustc_middle[232bd29a687eeda3]::ty::context::TyCtxt>>::super_fold_with::<rustc_middle[232bd29a687eeda3]::ty::subst::SubstFolder>
26: 0x7ff28290ae4b - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter as rustc_middle[232bd29a687eeda3]::ty::print::Printer>::print_def_path
27: 0x7ff28290a7c6 - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter as rustc_middle[232bd29a687eeda3]::ty::print::Printer>::print_def_path
28: 0x7ff282907f2b - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter as rustc_middle[232bd29a687eeda3]::ty::print::pretty::PrettyPrinter>::pretty_print_type
29: 0x7ff284d38036 - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter as rustc_middle[232bd29a687eeda3]::ty::print::pretty::PrettyPrinter>::pretty_fn_sig
30: 0x7ff284cfae2f - <rustc_middle[232bd29a687eeda3]::ty::sty::FnSig as rustc_middle[232bd29a687eeda3]::ty::print::Print<rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter>>::print
31: 0x7ff284d409f2 - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter>::pretty_in_binder::<rustc_middle[232bd29a687eeda3]::ty::sty::FnSig>
32: 0x7ff28290903b - <rustc_middle[232bd29a687eeda3]::ty::print::pretty::FmtPrinter as rustc_middle[232bd29a687eeda3]::ty::print::pretty::PrettyPrinter>::pretty_print_type
33: 0x7ff28290752c - <rustc_middle[232bd29a687eeda3]::ty::Ty as core[3afeaedfb140cde7]::fmt::Display>::fmt
34: 0x7ff284d51a28 - <rustc_middle[232bd29a687eeda3]::ty::Ty as core[3afeaedfb140cde7]::fmt::Debug>::fmt
35: 0x7ff2859a360c - core::fmt::builders::DebugTuple::field::{{closure}}::hae8bf7adeee9f6a5
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/builders.rs:322:17
36: 0x7ff2859a360c - core::result::Result<T,E>::and_then::h929eb9fc8e20a049
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/result.rs:1319:22
37: 0x7ff2859a360c - core::fmt::builders::DebugTuple::field::h3d7fca7c97960413
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/builders.rs:309:35
38: 0x7ff2859a7b1b - core::fmt::Formatter::debug_tuple_field1_finish::h4e6f73694bf6c84f
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/mod.rs:2023:9
39: 0x7ff284c64cea - <rustc_middle[232bd29a687eeda3]::ty::typeck_results::UserType as core[3afeaedfb140cde7]::fmt::Debug>::fmt
40: 0x7ff2859a3379 - core::fmt::builders::DebugStruct::field::{{closure}}::h473ac448a7c4116a
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/builders.rs:141:17
41: 0x7ff2859a3379 - core::result::Result<T,E>::and_then::hbb9e091b5a5e90dc
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/result.rs:1319:22
42: 0x7ff2859a3379 - core::fmt::builders::DebugStruct::field::h4e3ae4a6f27f2d47
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/builders.rs:124:35
43: 0x7ff2859a7696 - core::fmt::Formatter::debug_struct_field3_finish::h38cd8cf3f886f443
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/mod.rs:1911:9
44: 0x7ff284cf81ed - <rustc_middle[232bd29a687eeda3]::infer::canonical::Canonical<rustc_middle[232bd29a687eeda3]::ty::typeck_results::UserType> as core[3afeaedfb140cde7]::fmt::Debug>::fmt
45: 0x7ff2859a66ff - core::fmt::rt::Argument::fmt::ha5dde4cb71578cc2
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/rt.rs:138:9
46: 0x7ff2859a66ff - core::fmt::write::hb1413899fd777907
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/core/src/fmt/mod.rs:1094:21
47: 0x7ff284e79100 - <std[53b54636b4f52653]::io::buffered::bufwriter::BufWriter<std[53b54636b4f52653]::fs::File> as std[53b54636b4f52653]::io::Write>::write_fmt
48: 0x7ff284c8fd4b - rustc_middle[232bd29a687eeda3]::mir::pretty::write_user_type_annotations
49: 0x7ff284e587ee - rustc_middle[232bd29a687eeda3]::mir::pretty::dump_matched_mir_node::<rustc_mir_transform[bd425728c1433367]::pass_manager::dump_mir_for_phase_change::{closure#0}>
50: 0x7ff283840fc6 - rustc_mir_transform[bd425728c1433367]::mir_const
51: 0x7ff28383e853 - rustc_query_system[8be5ea0cc4c28ea6]::query::plumbing::try_execute_query::<rustc_query_impl[94005537e54250be]::queries::mir_const, rustc_query_impl[94005537e54250be]::plumbing::QueryCtxt>
52: 0x7ff28383e4f5 - rustc_query_impl[94005537e54250be]::get_query::mir_const
53: 0x7ff2836541a1 - rustc_mir_transform[bd425728c1433367]::mir_promoted
54: 0x7ff28318dbea - rustc_query_system[8be5ea0cc4c28ea6]::query::plumbing::try_execute_query::<rustc_query_impl[94005537e54250be]::queries::mir_promoted, rustc_query_impl[94005537e54250be]::plumbing::QueryCtxt>
55: 0x7ff28318cf5c - rustc_borrowck[2561add2bcb16522]::mir_borrowck
56: 0x7ff28318b748 - rustc_query_system[8be5ea0cc4c28ea6]::query::plumbing::try_execute_query::<rustc_query_impl[94005537e54250be]::queries::mir_borrowck, rustc_query_impl[94005537e54250be]::plumbing::QueryCtxt>
57: 0x7ff283bef386 - rustc_data_structures[fba7df231146955e]::sync::par_for_each_in::<&[rustc_span[811089187935bcb6]::def_id::LocalDefId], <rustc_middle[232bd29a687eeda3]::hir::map::Map>::par_body_owners<rustc_interface[1005215f39c21569]::passes::analysis::{closure#1}::{closure#0}>::{closure#0}>
58: 0x7ff283be9f80 - rustc_interface[1005215f39c21569]::passes::analysis
59: 0x7ff283f2bd47 - rustc_query_system[8be5ea0cc4c28ea6]::query::plumbing::try_execute_query::<rustc_query_impl[94005537e54250be]::queries::analysis, rustc_query_impl[94005537e54250be]::plumbing::QueryCtxt>
60: 0x7ff283f2ba63 - rustc_query_impl[94005537e54250be]::get_query::analysis
61: 0x7ff2839ccbcf - <rustc_middle[232bd29a687eeda3]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[27c68de0ac55b06a]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>>
62: 0x7ff2839cbcaf - <rustc_interface[1005215f39c21569]::interface::Compiler>::enter::<rustc_driver_impl[27c68de0ac55b06a]::run_compiler::{closure#1}::{closure#2}, core[3afeaedfb140cde7]::result::Result<core[3afeaedfb140cde7]::option::Option<rustc_interface[1005215f39c21569]::queries::Linker>, rustc_span[811089187935bcb6]::ErrorGuaranteed>>
63: 0x7ff2839c933b - std[53b54636b4f52653]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1005215f39c21569]::util::run_in_thread_pool_with_globals<rustc_interface[1005215f39c21569]::interface::run_compiler<core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>, rustc_driver_impl[27c68de0ac55b06a]::run_compiler::{closure#1}>::{closure#0}, core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>>
64: 0x7ff284098f55 - <<std[53b54636b4f52653]::thread::Builder>::spawn_unchecked_<rustc_interface[1005215f39c21569]::util::run_in_thread_pool_with_globals<rustc_interface[1005215f39c21569]::interface::run_compiler<core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>, rustc_driver_impl[27c68de0ac55b06a]::run_compiler::{closure#1}>::{closure#0}, core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3afeaedfb140cde7]::result::Result<(), rustc_span[811089187935bcb6]::ErrorGuaranteed>>::{closure#1} as core[3afeaedfb140cde7]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
65: 0x7ff2859539d5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h20fe0a24dda744f1
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/alloc/src/boxed.rs:1985:9
66: 0x7ff2859539d5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb11b4529d66356f4
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/alloc/src/boxed.rs:1985:9
67: 0x7ff2859539d5 - std::sys::unix::thread::Thread::new::thread_start::h896be1b4ceadbc98
at /rustc/2f2c438dce75d8cc532c3baa849eeddc0901802c/library/std/src/sys/unix/thread.rs:108:17
68: 0x7ff281465bb5 - <unknown>
69: 0x7ff2814e7d90 - <unknown>
70: 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 1.71.0-nightly (2f2c438dc 2023-05-08) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z dump-mir=all
query stack during panic:
#0 [mir_const] preparing `ret_ref_local` for borrow checking
#1 [mir_promoted] promoting constants in MIR for `ret_ref_local`
#2 [mir_borrowck] borrow-checking `ret_ref_local`
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error