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cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:199 ~ dev_remenants[a0e3]::is_ignored::'), ') }) <= '_#3r #109339

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jmsunseri opened this issue Mar 19, 2023 · 6 comments
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cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:199 ~ dev_remenants[a0e3]::is_ignored::'), ') }) <= '_#3r #109339

jmsunseri opened this issue Mar 19, 2023 · 6 comments
Labels
A-borrow-checker Area: The borrow checker A-type-system Area: Type system C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
Milestone
1.68.0

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@jmsunseri
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jmsunseri commented Mar 19, 2023 •
edited by workingjubilee
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Code

https://gitlab.com/jmsunseri/dev-remenants/-/commits/git-search

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rustc --version --verbose:

<version>
➜  dev-remenants git:(git-search) rustc --version --verbose
rustc 1.68.0 (2c8cc3432 2023-03-06)
binary: rustc
commit-hash: 2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74
commit-date: 2023-03-06
host: x86_64-unknown-linux-gnu
release: 1.68.0
LLVM version: 15.0.6

Error output

error: internal compiler error: compiler/rustc_infer/src/infer/region_constraints/mod.rs:568:17: cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:199 ~ dev_remenants[a0e3]::is_ignored::'_), '_) }) <= '_#3r

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/compiler/rustc_errors/src/lib.rs:987:33
stack backtrace:
...

note: the compiler unexpectedly panicked. this is a bug.

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 1.68.0 (2c8cc34 2023-03-06) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `is_ignored`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `dev-remenants`
Backtrace 

error: internal compiler error: compiler/rustc_infer/src/infer/region_constraints/mod.rs:568:17: cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:199 ~ dev_remenants[a0e3]::is_ignored::'_), '_) }) <= '_#3r

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/compiler/rustc_errors/src/lib.rs:987:33
stack backtrace:
   0:     0x7f03e816659a - std::backtrace_rs::backtrace::libunwind::trace::h595f06c70adcc478
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f03e816659a - std::backtrace_rs::backtrace::trace_unsynchronized::h177a0149c76cdde9
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f03e816659a - std::sys_common::backtrace::_print_fmt::hc0701fd2c3530c58
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f03e816659a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd4cd115d8750fd6c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f03e81c839e - core::fmt::write::h93e2f5923c7eca08
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/core/src/fmt/mod.rs:1213:17
   5:     0x7f03e8156be5 - std::io::Write::write_fmt::h8162dbb45f0b9e62
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/io/mod.rs:1682:15
   6:     0x7f03e8166365 - std::sys_common::backtrace::_print::h1835ef8a8f9066da
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f03e8166365 - std::sys_common::backtrace::print::hcb5e6388b9235f41
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f03e816912f - std::panicking::default_hook::{{closure}}::h9c084969ccf9a722
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:267:22
   9:     0x7f03e8168e6b - std::panicking::default_hook::h68fa2ba3c3c6c12f
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:286:9
  10:     0x7f03eb4b56e4 - <rustc_driver[f4ad927b3c57833d]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[d16e85342ea223d9]::ops::function::FnOnce<(&core[d16e85342ea223d9]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f03e816996a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4e6ced11e07d8b24
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:2002:9
  12:     0x7f03e816996a - std::panicking::rust_panic_with_hook::h8d5c434518ef298c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/panicking.rs:692:13
  13:     0x7f03eb771501 - std[3da461b304582a2c]::panicking::begin_panic::<rustc_errors[41d09747e2f98dea]::ExplicitBug>::{closure#0}
  14:     0x7f03eb769e56 - std[3da461b304582a2c]::sys_common::backtrace::__rust_end_short_backtrace::<std[3da461b304582a2c]::panicking::begin_panic<rustc_errors[41d09747e2f98dea]::ExplicitBug>::{closure#0}, !>
  15:     0x7f03eb7f9df6 - std[3da461b304582a2c]::panicking::begin_panic::<rustc_errors[41d09747e2f98dea]::ExplicitBug>
  16:     0x7f03eb7f9de6 - std[3da461b304582a2c]::panic::panic_any::<rustc_errors[41d09747e2f98dea]::ExplicitBug>
  17:     0x7f03eb7f8b92 - <rustc_errors[41d09747e2f98dea]::HandlerInner>::span_bug::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span, &alloc[5b05b59796bdfb5c]::string::String>
  18:     0x7f03eb7f8a37 - <rustc_errors[41d09747e2f98dea]::Handler>::span_bug::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span, &alloc[5b05b59796bdfb5c]::string::String>
  19:     0x7f03eb7adf9b - rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}
  20:     0x7f03eb7adfea - rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_opt::<rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f03eb7ad0aa - rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_context_opt::<rustc_middle[eb7209f5870e9fb7]::ty::context::tls::with_opt<rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f03eb7acfd6 - rustc_middle[eb7209f5870e9fb7]::util::bug::opt_span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>
  23:     0x7f03eb7acf94 - rustc_middle[eb7209f5870e9fb7]::util::bug::span_bug_fmt::<rustc_span[4bb3e3ecb57f95d5]::span_encoding::Span>
  24:     0x7f03e9443fa4 - <rustc_middle[eb7209f5870e9fb7]::ty::sty::Region as rustc_middle[eb7209f5870e9fb7]::ty::relate::Relate>::relate::<rustc_infer[41785f830319e09c]::infer::equate::Equate>
  25:     0x7f03e943f25f - rustc_middle[eb7209f5870e9fb7]::ty::relate::super_relate_tys::<rustc_infer[41785f830319e09c]::infer::equate::Equate>
  26:     0x7f03e943c25e - <rustc_infer[41785f830319e09c]::infer::equate::Equate as rustc_middle[eb7209f5870e9fb7]::ty::relate::TypeRelation>::tys
  27:     0x7f03e9d75d23 - <rustc_infer[41785f830319e09c]::infer::InferCtxt>::commit_if_ok::<rustc_infer[41785f830319e09c]::infer::InferOk<()>, rustc_middle[eb7209f5870e9fb7]::ty::error::TypeError, <rustc_infer[41785f830319e09c]::infer::at::Trace>::eq<rustc_middle[eb7209f5870e9fb7]::ty::Ty>::{closure#0}>
  28:     0x7f03e9d75c16 - <rustc_infer[41785f830319e09c]::infer::at::At>::eq::<rustc_middle[eb7209f5870e9fb7]::ty::Ty>
  29:     0x7f03ec093bfe - <rustc_infer[41785f830319e09c]::infer::InferCtxt>::can_eq::<rustc_middle[eb7209f5870e9fb7]::ty::Ty>
  30:     0x7f03ec076b42 - rustc_trait_selection[94d7ef6b5a6b8462]::traits::error_reporting::suggestions::hint_missing_borrow
  31:     0x7f03ec119fe4 - <rustc_infer[41785f830319e09c]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[94d7ef6b5a6b8462]::traits::error_reporting::suggestions::TypeErrCtxtExt>::report_closure_arg_mismatch
  32:     0x7f03ec129e38 - <rustc_infer[41785f830319e09c]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[94d7ef6b5a6b8462]::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
  33:     0x7f03ec133817 - <rustc_infer[41785f830319e09c]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[94d7ef6b5a6b8462]::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
  34:     0x7f03ec126e7f - <rustc_infer[41785f830319e09c]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[94d7ef6b5a6b8462]::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
  35:     0x7f03e95d07dd - <rustc_hir_typeck[7533f7cabd9af3c4]::fn_ctxt::FnCtxt>::type_inference_fallback
  36:     0x7f03e95bb86b - rustc_hir_typeck[7533f7cabd9af3c4]::typeck
  37:     0x7f03e9529bf7 - <rustc_query_system[e5b40bf290de15d8]::dep_graph::graph::DepGraph<rustc_middle[eb7209f5870e9fb7]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[eb7209f5870e9fb7]::ty::context::TyCtxt, rustc_span[4bb3e3ecb57f95d5]::def_id::LocalDefId, &rustc_middle[eb7209f5870e9fb7]::ty::typeck_results::TypeckResults>
  38:     0x7f03e952174b - rustc_query_system[e5b40bf290de15d8]::query::plumbing::try_execute_query::<rustc_query_impl[3a6baddf07124ab7]::queries::typeck, rustc_query_impl[3a6baddf07124ab7]::plumbing::QueryCtxt>
  39:     0x7f03eac08aad - rustc_data_structures[f387d52c0b9780fc]::sync::par_for_each_in::<&[rustc_span[4bb3e3ecb57f95d5]::def_id::LocalDefId], <rustc_middle[eb7209f5870e9fb7]::hir::map::Map>::par_body_owners<rustc_hir_typeck[7533f7cabd9af3c4]::typeck_item_bodies::{closure#0}>::{closure#0}>
  40:     0x7f03eac08853 - rustc_hir_typeck[7533f7cabd9af3c4]::typeck_item_bodies
  41:     0x7f03eac1fa07 - <rustc_query_system[e5b40bf290de15d8]::dep_graph::graph::DepGraph<rustc_middle[eb7209f5870e9fb7]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[eb7209f5870e9fb7]::ty::context::TyCtxt, (), ()>
  42:     0x7f03eaa328e6 - rustc_query_system[e5b40bf290de15d8]::query::plumbing::try_execute_query::<rustc_query_impl[3a6baddf07124ab7]::queries::typeck_item_bodies, rustc_query_impl[3a6baddf07124ab7]::plumbing::QueryCtxt>
  43:     0x7f03eae6eefb - <rustc_query_impl[3a6baddf07124ab7]::Queries as rustc_middle[eb7209f5870e9fb7]::ty::query::QueryEngine>::typeck_item_bodies
  44:     0x7f03e9960892 - <rustc_session[b580c712976fc965]::session::Session>::time::<(), rustc_hir_analysis[9174c993ab369dfd]::check_crate::{closure#7}>
  45:     0x7f03e995fd12 - rustc_hir_analysis[9174c993ab369dfd]::check_crate
  46:     0x7f03e995f96b - rustc_interface[3781616314f5d936]::passes::analysis
  47:     0x7f03eabd7b16 - <rustc_query_system[e5b40bf290de15d8]::dep_graph::graph::DepGraph<rustc_middle[eb7209f5870e9fb7]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[eb7209f5870e9fb7]::ty::context::TyCtxt, (), core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  48:     0x7f03eabd6cd1 - rustc_query_system[e5b40bf290de15d8]::query::plumbing::try_execute_query::<rustc_query_impl[3a6baddf07124ab7]::queries::analysis, rustc_query_impl[3a6baddf07124ab7]::plumbing::QueryCtxt>
  49:     0x7f03eae6b7aa - <rustc_query_impl[3a6baddf07124ab7]::Queries as rustc_middle[eb7209f5870e9fb7]::ty::query::QueryEngine>::analysis
  50:     0x7f03ea695850 - <rustc_interface[3781616314f5d936]::passes::QueryContext>::enter::<rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  51:     0x7f03ea6932c4 - rustc_span[4bb3e3ecb57f95d5]::with_source_map::<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  52:     0x7f03ea68bce4 - <scoped_tls[1a6b834cb64348ef]::ScopedKey<rustc_span[4bb3e3ecb57f95d5]::SessionGlobals>>::set::<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  53:     0x7f03ea68b3e2 - std[3da461b304582a2c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3781616314f5d936]::util::run_in_thread_pool_with_globals<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>
  54:     0x7f03ea68b18a - <<std[3da461b304582a2c]::thread::Builder>::spawn_unchecked_<rustc_interface[3781616314f5d936]::util::run_in_thread_pool_with_globals<rustc_interface[3781616314f5d936]::interface::run_compiler<core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>, rustc_driver[f4ad927b3c57833d]::run_compiler::{closure#1}>::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d16e85342ea223d9]::result::Result<(), rustc_errors[41d09747e2f98dea]::ErrorGuaranteed>>::{closure#1} as core[d16e85342ea223d9]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  55:     0x7f03e8173823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1c0f3664d7ced314
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:1988:9
  56:     0x7f03e8173823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h67647c21c6c4968a
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/alloc/src/boxed.rs:1988:9
  57:     0x7f03e8173823 - std::sys::unix::thread::Thread::new::thread_start::h355d348ba593a22c
                               at /rustc/2c8cc343237b8f7d5a3c3703e3a87f2eb2c54a74/library/std/src/sys/unix/thread.rs:108:17
  58:     0x7f03e7f1312d - start_thread
  59:     0x7f03e7f94bc0 - clone3
  60:                0x0 - <unknown>

note: the compiler unexpectedly panicked. this is a bug.

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 1.68.0 (2c8cc3432 2023-03-06) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `is_ignored`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `dev-remenants`

@jmsunseri jmsunseri added C-bug Category: This is a bug. 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. labels Mar 19, 2023
@workingjubilee
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Thank you for reporting an ICE!

Which commit of your repo did this break on?

@workingjubilee workingjubilee changed the title The compiler suggested i send this message to you cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:199 ~ dev_remenants[a0e3]::is_ignored::'), ') }) <= '_#3r Mar 19, 2023
@jmsunseri
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the last one. i don't think this is still an issue. i tried to compile using the nightly and it doesn't compile but at least it doesn't crash

@jmsunseri
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error[E0631]: type mismatch in closure arguments
   --> src/main.rs:202:29
    |
202 |     git_ignore_files.iter().any(|f: File| f.is_excluded(&dir_entry.path()) )
    |                             ^^^ --------- found signature defined here
    |                             |
    |                             expected due to this
    |
    = note: expected closure signature `fn(&gitignore::File<'_>) -> _`
               found closure signature `for<'a> fn(gitignore::File<'a>) -> _`
note: required by a bound in `any`
   --> /rustc/4a04d086cac54a41517d5657b59d5fe2caca2d71/library/core/src/iter/traits/iterator.rs:2692:5
help: consider borrowing the argument
    |
202 |     git_ignore_files.iter().any(|f: &File| f.is_excluded(&dir_entry.path()) )
    |                                     +

For more information about this error, try `rustc --explain E0631`.
error: could not compile `dev-remenants` (bin "dev-remenants") due to previous error

@workingjubilee
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workingjubilee commented Mar 19, 2023 •
edited
Loading

Cool!
For later reference, that commit SHA is 019fdacf906f1bb4c662bd2e9001349c84cf79ee
We'll probably close this if it is indeed fixed already, yeah, but maybe it's related to incremental compilation or something else and switching rustcs didn't actually fix it!

@compiler-errors compiler-errors added the E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example label Mar 19, 2023
@workingjubilee workingjubilee mentioned this issue Mar 21, 2023
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@jyn514
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jyn514 commented Mar 21, 2023

#109361 also looks related, so given there's 3 different reports in 3 days it's probably not related to incremental bugs.

@jyn514 jyn514 added the regression-from-stable-to-stable Performance or correctness regression from one stable version to another. label Mar 21, 2023
@rustbot rustbot added the I-prioritize Issue: Indicates that prioritization has been requested for this issue. label Mar 21, 2023
@jyn514 jyn514 added A-type-system Area: Type system A-borrow-checker Area: The borrow checker labels Mar 21, 2023
@jyn514 jyn514 added this to the 1.68.0 milestone Mar 21, 2023
@jyn514 jyn514 mentioned this issue Mar 21, 2023
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@aliemjay
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This is fixed in latest nightly with sufficient tests. Closing in favor of #109361 which has an MCVE and to track a possible stable backport.

@aliemjay aliemjay closed this as not planned Won't fix, can't repro, duplicate, stale Mar 21, 2023
@aliemjay aliemjay removed the E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example label Mar 21, 2023
@apiraino apiraino removed the I-prioritize Issue: Indicates that prioritization has been requested for this issue. label Mar 22, 2023
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A-borrow-checker Area: The borrow checker A-type-system Area: Type system C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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