ICE: ` cannot convert ReFree to a region vid`
matthiaskrgr opened this issue · 9 comments
matthiaskrgr commented
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
compiler-errors commented
What the hell is going on here
matthiaskrgr commented
@BoxyUwU why do you open duplicate low-quality bugreports and then close the more detailed ones "in favor" of your own tickets that you just created? I have seen this happen a couple of times already. Why not just comment on the original issue? 🙂
matthiaskrgr commented
@BoxyUwU also , if you open a PR that causes several regressions and reopens a bunch of already fixed tickets like #111215 it would be nice if you could just proactively reopen the regression and also post an updated stacktrace to your regression so that the old tickets can actually be found by searching the ice msg in the bugtracker ^^
BoxyUwU commented
I have seen this happen a couple of times already.
What are you on about, i have in the past created issues to track dozens of issues instead of being spread all over the place, they were not low quality. I assume you're referring to #106994 ? This is far more helpful of an issue for working on generic_const_exprs than a dozen random "subst out of range" ICEs polluting the F-generic_const_exprs label, additionally the issue Actually explains wtf is broken in rustc and needs fixing
matthiaskrgr commented
That might be the view point from someone who is familiar with the state of generic const exprs, yes.
The problem is that someone who just tried out the feature might search some part of the ice message (which you also didn't include in 106994) will not find any open issues because they have all been closed "in favor" of these collection issues. So they will naturally open a new ticker for bug because "obviously its a unknown problem, could not find any open tickets" You can see this still happening for 106994 https://github.com/rust-lang/rust/issues?q=is%3Aissue++%22out+of+range+when+substituting%22+
So it actually has the opposite of the intended effect.
matthiaskrgr commented
Also by keeping the separate issues open we can make sure actually all of the MVCEs are fixed and add tests for all of them before closing which reduces the chance of anything slipping through the cracks which is more likely to happen if active ICEs are closed prematurely.
JohnTitor commented
Triage: Fixed on the latest nightly, marking as E-needs-test but feel free to close if there's a regression test already.
compiler-errors commented
yeah, no need for an additional test. was fixed by #115486.