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ICE: cannot convert ReFree to a region vid #111433

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matthiaskrgr opened this issue May 10, 2023 · 9 comments
Closed

ICE: cannot convert ReFree to a region vid #111433

matthiaskrgr opened this issue May 10, 2023 · 9 comments
Labels
A-const-generics Area: const generics (parameters and arguments) C-bug Category: This is a bug. F-generic_const_exprs `#![feature(generic_const_exprs)]` glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@matthiaskrgr
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Code

./tests/ui/const-generics/late-bound-vars/simple.rs

#![feature(generic_const_exprs)]
#![allow(incomplete_features)]

const fn inner<'a>() -> usize where &'a (): Sized {
    3
}

fn test<'a>() {
    let _: [u8; inner::<'a>()];
    let _ = [0; inner::<'a>()];
}

fn main() {
    test();
}

Meta

rustc --version --verbose:

rustc 1.71.0-nightly (2f6bc5d25 2023-05-09)
binary: rustc
commit-hash: 2f6bc5d259e7ab25ddfdd33de53b892770218918
commit-date: 2023-05-09
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_borrowck/src/universal_regions.rs:882:36: cannot convert `ReFree(DefId(0:5 ~ simple[493b]::test), BrNamed(DefId(0:6 ~ simple[493b]::test::'a), 'a))` to a region vid

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/compiler/rustc_errors/src/lib.rs:1650:9
stack backtrace:
   0:     0x7fe9b4d6a3b1 - std::backtrace_rs::backtrace::libunwind::trace::h6e5b7e23399032cc
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fe9b4d6a3b1 - std::backtrace_rs::backtrace::trace_unsynchronized::h4528c06bee1e0a8b
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fe9b4d6a3b1 - std::sys_common::backtrace::_print_fmt::h8c8479101d563d31
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fe9b4d6a3b1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf3690daedd46952c
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fe9b4dca80f - core::fmt::rt::Argument::fmt::h79448537abb02c02
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/core/src/fmt/rt.rs:138:9
   5:     0x7fe9b4dca80f - core::fmt::write::hb7b70c241601eb54
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/core/src/fmt/mod.rs:1094:21
   6:     0x7fe9b4d5d611 - std::io::Write::write_fmt::h2b40bdf00a46cf42
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/io/mod.rs:1712:15
   7:     0x7fe9b4d6a1c5 - std::sys_common::backtrace::_print::h264fd8ac10e4d719
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7fe9b4d6a1c5 - std::sys_common::backtrace::print::h6190a4e08057accf
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7fe9b4d6ce47 - std::panicking::default_hook::{{closure}}::h1fcb6a5fbc17c145
  10:     0x7fe9b4d6cc34 - std::panicking::default_hook::h1d4472ea1534e7eb
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/panicking.rs:288:9
  11:     0x7fe9b7fd3cdb - <rustc_driver_impl[ce322c91000f3e2b]::install_ice_hook::{closure#0} as core[7de8eb2b24556be4]::ops::function::FnOnce<(&core[7de8eb2b24556be4]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7fe9b4d6d567 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h05757514719e9e39
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/alloc/src/boxed.rs:1999:9
  13:     0x7fe9b4d6d567 - std::panicking::rust_panic_with_hook::h26983c5985cc3d7d
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/panicking.rs:695:13
  14:     0x7fe9b84c1321 - std[bc31d8d7a4b25d9b]::panicking::begin_panic::<rustc_errors[f17d5d6c3485e527]::ExplicitBug>::{closure#0}
  15:     0x7fe9b84beea6 - std[bc31d8d7a4b25d9b]::sys_common::backtrace::__rust_end_short_backtrace::<std[bc31d8d7a4b25d9b]::panicking::begin_panic<rustc_errors[f17d5d6c3485e527]::ExplicitBug>::{closure#0}, !>
  16:     0x7fe9b84beb46 - std[bc31d8d7a4b25d9b]::panicking::begin_panic::<rustc_errors[f17d5d6c3485e527]::ExplicitBug>
  17:     0x7fe9b84b99e4 - <rustc_errors[f17d5d6c3485e527]::HandlerInner>::bug::<alloc[62a5dcc9069c15c8]::string::String>
  18:     0x7fe9b84b9716 - <rustc_errors[f17d5d6c3485e527]::Handler>::bug::<alloc[62a5dcc9069c15c8]::string::String>
  19:     0x7fe9b85521ec - rustc_middle[b96152969e862739]::util::bug::opt_span_bug_fmt::<rustc_span[feb72a2200ed999]::span_encoding::Span>::{closure#0}
  20:     0x7fe9b8551b2a - rustc_middle[b96152969e862739]::ty::context::tls::with_opt::<rustc_middle[b96152969e862739]::util::bug::opt_span_bug_fmt<rustc_span[feb72a2200ed999]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7fe9b8551afa - rustc_middle[b96152969e862739]::ty::context::tls::with_context_opt::<rustc_middle[b96152969e862739]::ty::context::tls::with_opt<rustc_middle[b96152969e862739]::util::bug::opt_span_bug_fmt<rustc_span[feb72a2200ed999]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7fe9b6207a3d - rustc_middle[b96152969e862739]::util::bug::bug_fmt
  23:     0x7fe9b6fb2da3 - <rustc_borrowck[870b2eadfe30ec99]::type_check::constraint_conversion::ConstraintConversion>::convert_all
  24:     0x7fe9b6f23c85 - <rustc_borrowck[870b2eadfe30ec99]::type_check::TypeChecker>::ascribe_user_type
  25:     0x7fe9b6f1af86 - rustc_borrowck[870b2eadfe30ec99]::nll::compute_regions
  26:     0x7fe9b6ec82bc - rustc_borrowck[870b2eadfe30ec99]::do_mir_borrowck
  27:     0x7fe9b6ec4a12 - rustc_borrowck[870b2eadfe30ec99]::mir_borrowck
  28:     0x7fe9b6ec2dc8 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::mir_borrowck, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  29:     0x7fe9b6ec2ab0 - rustc_query_impl[ff2244d0f49f60a1]::get_query::mir_borrowck
  30:     0x7fe9b69e5180 - rustc_mir_transform[30e93fa49ed080f7]::mir_drops_elaborated_and_const_checked
  31:     0x7fe9b69e30c8 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  32:     0x7fe9b69e2af0 - rustc_query_impl[ff2244d0f49f60a1]::get_query::mir_drops_elaborated_and_const_checked
  33:     0x7fe9b6ca6a4c - rustc_mir_transform[30e93fa49ed080f7]::mir_for_ctfe
  34:     0x7fe9b7444cd8 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::mir_for_ctfe, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  35:     0x7fe9b744485f - rustc_query_impl[ff2244d0f49f60a1]::get_query::mir_for_ctfe
  36:     0x7fe9b6490ec0 - <rustc_const_eval[3aaa2df1d62119a5]::interpret::eval_context::InterpCx<rustc_const_eval[3aaa2df1d62119a5]::const_eval::machine::CompileTimeInterpreter>>::load_mir
  37:     0x7fe9b63a8c11 - rustc_const_eval[3aaa2df1d62119a5]::const_eval::eval_queries::eval_to_allocation_raw_provider
  38:     0x7fe9b7301355 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::eval_to_allocation_raw, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  39:     0x7fe9b7300f8f - rustc_query_impl[ff2244d0f49f60a1]::get_query::eval_to_allocation_raw
  40:     0x7fe9b63a91fa - rustc_const_eval[3aaa2df1d62119a5]::const_eval::eval_queries::eval_to_allocation_raw_provider
  41:     0x7fe9b7301355 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::eval_to_allocation_raw, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  42:     0x7fe9b7300f8f - rustc_query_impl[ff2244d0f49f60a1]::get_query::eval_to_allocation_raw
  43:     0x7fe9b771d353 - rustc_const_eval[3aaa2df1d62119a5]::const_eval::eval_to_valtree
  44:     0x7fe9b771d1e0 - <rustc_const_eval[3aaa2df1d62119a5]::provide::{closure#0} as core[7de8eb2b24556be4]::ops::function::FnOnce<(rustc_middle[b96152969e862739]::ty::context::TyCtxt, rustc_middle[b96152969e862739]::ty::ParamEnvAnd<rustc_middle[b96152969e862739]::mir::interpret::GlobalId>)>>::call_once
  45:     0x7fe9b7670da2 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::eval_to_valtree, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  46:     0x7fe9b76709b5 - rustc_query_impl[ff2244d0f49f60a1]::get_query::eval_to_valtree
  47:     0x7fe9b623f880 - rustc_middle[b96152969e862739]::ty::query::query_get_at::<rustc_query_system[180594c788319d08]::query::caches::DefaultCache<rustc_middle[b96152969e862739]::ty::ParamEnvAnd<rustc_middle[b96152969e862739]::mir::interpret::GlobalId>, rustc_middle[b96152969e862739]::query::erase::Erased<[u8; 24usize]>>>
  48:     0x7fe9b623f567 - <rustc_middle[b96152969e862739]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  49:     0x7fe9b623f11c - <rustc_middle[b96152969e862739]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  50:     0x7fe9b657df10 - <rustc_middle[b96152969e862739]::ty::consts::kind::ConstKind>::eval
  51:     0x7fe9b6500146 - <rustc_hir_typeck[8b356db618624f6b]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  52:     0x7fe9b654814a - <rustc_hir_typeck[8b356db618624f6b]::fn_ctxt::FnCtxt>::check_decl
  53:     0x7fe9b6543eb2 - <rustc_hir_typeck[8b356db618624f6b]::fn_ctxt::FnCtxt>::check_block_with_expected
  54:     0x7fe9b64fb789 - <rustc_hir_typeck[8b356db618624f6b]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  55:     0x7fe9b66384e6 - <rustc_hir_typeck[8b356db618624f6b]::fn_ctxt::FnCtxt>::check_return_expr
  56:     0x7fe9b663015e - rustc_hir_typeck[8b356db618624f6b]::check::check_fn
  57:     0x7fe9b6616fa3 - rustc_hir_typeck[8b356db618624f6b]::typeck
  58:     0x7fe9b660cad2 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::typeck, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  59:     0x7fe9b7024d63 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::used_trait_imports, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  60:     0x7fe9b74a1239 - rustc_hir_analysis[90d331eccd9fdd4d]::check_crate
  61:     0x7fe9b7495520 - rustc_interface[10d1c68131cce565]::passes::analysis
  62:     0x7fe9b774a407 - rustc_query_system[180594c788319d08]::query::plumbing::try_execute_query::<rustc_query_impl[ff2244d0f49f60a1]::queries::analysis, rustc_query_impl[ff2244d0f49f60a1]::plumbing::QueryCtxt>
  63:     0x7fe9b774a123 - rustc_query_impl[ff2244d0f49f60a1]::get_query::analysis
  64:     0x7fe9b71e05cf - <rustc_middle[b96152969e862739]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[ce322c91000f3e2b]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>>
  65:     0x7fe9b71df6af - <rustc_interface[10d1c68131cce565]::interface::Compiler>::enter::<rustc_driver_impl[ce322c91000f3e2b]::run_compiler::{closure#1}::{closure#2}, core[7de8eb2b24556be4]::result::Result<core[7de8eb2b24556be4]::option::Option<rustc_interface[10d1c68131cce565]::queries::Linker>, rustc_span[feb72a2200ed999]::ErrorGuaranteed>>
  66:     0x7fe9b71dcd3b - std[bc31d8d7a4b25d9b]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[10d1c68131cce565]::util::run_in_thread_pool_with_globals<rustc_interface[10d1c68131cce565]::interface::run_compiler<core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>, rustc_driver_impl[ce322c91000f3e2b]::run_compiler::{closure#1}>::{closure#0}, core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>>
  67:     0x7fe9b78b5155 - <<std[bc31d8d7a4b25d9b]::thread::Builder>::spawn_unchecked_<rustc_interface[10d1c68131cce565]::util::run_in_thread_pool_with_globals<rustc_interface[10d1c68131cce565]::interface::run_compiler<core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>, rustc_driver_impl[ce322c91000f3e2b]::run_compiler::{closure#1}>::{closure#0}, core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7de8eb2b24556be4]::result::Result<(), rustc_span[feb72a2200ed999]::ErrorGuaranteed>>::{closure#1} as core[7de8eb2b24556be4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  68:     0x7fe9b4d77a15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hdc6a7ff0c7f1614a
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/alloc/src/boxed.rs:1985:9
  69:     0x7fe9b4d77a15 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf73467eae757427c
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/alloc/src/boxed.rs:1985:9
  70:     0x7fe9b4d77a15 - std::sys::unix::thread::Thread::new::thread_start::h747e49fa31477839
                               at /rustc/cba14074bb4cc12bfe918eabd0d52a3999b2a461/library/std/src/sys/unix/thread.rs:108:17
  71:     0x7fe9b4b14bb5 - <unknown>
  72:     0x7fe9b4b96d90 - <unknown>
  73:                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 (cba14074b 2023-05-10) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_borrowck] borrow-checking `test::{constant#1}`
#1 [mir_drops_elaborated_and_const_checked] elaborating drops for `test::{constant#1}`
#2 [mir_for_ctfe] caching mir of `test::{constant#1}` for CTFE
#3 [eval_to_allocation_raw] const-evaluating + checking `test::{constant#1}`
#4 [eval_to_allocation_raw] const-evaluating + checking `test::{constant#1}`
#5 [eval_to_valtree] evaluating type-level constant
#6 [typeck] type-checking `test`
#7 [used_trait_imports] finding used_trait_imports `test`
#8 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

@matthiaskrgr matthiaskrgr added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-bug Category: This is a bug. labels May 10, 2023
@BoxyUwU BoxyUwU added A-const-generics Area: const generics (parameters and arguments) F-generic_const_exprs `#![feature(generic_const_exprs)]` labels May 10, 2023
@BoxyUwU
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BoxyUwU commented May 10, 2023

going to close this in favor of #111434

@BoxyUwU BoxyUwU closed this as completed May 10, 2023
@matthiaskrgr matthiaskrgr reopened this May 10, 2023
@BoxyUwU BoxyUwU closed this as completed May 10, 2023
@matthiaskrgr matthiaskrgr reopened this May 10, 2023
@compiler-errors

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@rust-lang-glacier-bot rust-lang-glacier-bot added the glacier ICE tracked in rust-lang/glacier. label Jul 14, 2023
@github-actions github-actions bot mentioned this issue Sep 21, 2023
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@JohnTitor
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Triage: Fixed on the latest nightly, marking as E-needs-test but feel free to close if there's a regression test already.

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yeah, no need for an additional test. was fixed by #115486.

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