ICE for perform_test in pattern matching checking

[chenyukang]

Modified code from #109188 (comment),

Code

enum Either {
    One(X),
    Two(X),
}

struct X;

fn move_into_fnmut() {
    let x = Either::One(X);
    let y = || {
        let Either::Two(a) = x;
    };
}

fn main() { }

Only crash with the option --edition 2021:

rustc  --edition 2021  ./p/debug3.rs

Meta

rustc --version --verbose:

rustc 1.70.0-nightly (da7c50c08 2023-03-19)

Error output

<output>

Backtrace

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_mir_build/src/build/expr/as_place.rs:258:31
stack backtrace:
   0:        0x100b585f8 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hee0b2bdff53fbe2f
   1:        0x100bab3e4 - core::fmt::write::h2ec568216ced94aa
   2:        0x100b4e150 - std::io::Write::write_fmt::h872103ea2db2d6d8
   3:        0x100b5840c - std::sys_common::backtrace::print::h646c6cf0f9475b69
   4:        0x100b5ae94 - std::panicking::default_hook::{{closure}}::h8e98062e20db6bab
   5:        0x100b5abec - std::panicking::default_hook::h57307cc19ca2fc56
   6:        0x108cdfd0c - rustc_driver_impl[fe7592cf9605ddfa]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x100b5b58c - std::panicking::rust_panic_with_hook::h11f2b48dbccc22ae
   8:        0x100b5b344 - std::panicking::begin_panic_handler::{{closure}}::ha7c8b2604e8b2c49
   9:        0x100b58a18 - std::sys_common::backtrace::__rust_end_short_backtrace::hbdbd76863bbae247
  10:        0x100b5b0e0 - _rust_begin_unwind
  11:        0x100bd6648 - core::panicking::panic_fmt::h837acd5e3ef8f820
  12:        0x100bd66b8 - core::panicking::panic::hc8eadf36d168ba5e
  13:        0x10b747e3c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::match_simplified_candidates
  14:        0x10b7432ac - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::lower_match_tree
  15:        0x10b743b4c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::place_into_pattern
  16:        0x10b73a178 - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::ast_block_stmts
  17:        0x10b752b28 - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::in_scope::<<rustc_mir_build[2f3783f86689cfe3]::build::Builder>::ast_block::{closure#2}::{closure#0}, ()>
  18:        0x10b74f494 - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest
  19:        0x10b75349c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::in_scope::<<rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest::{closure#0}::{closure#0}, ()>
  20:        0x10b75127c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest::{closure#0}
  21:        0x10b74ee34 - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest
  22:        0x10b75349c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::in_scope::<<rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest::{closure#0}::{closure#0}, ()>
  23:        0x10b75127c - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest::{closure#0}
  24:        0x10b74ee34 - <rustc_mir_build[2f3783f86689cfe3]::build::Builder>::expr_into_dest
  25:        0x10b737368 - rustc_mir_build[2f3783f86689cfe3]::build::mir_build
  26:        0x10b735374 - rustc_mir_build[2f3783f86689cfe3]::build::mir_built
  27:        0x10bd9bb88 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::mir_built, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  28:        0x10be7a354 - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::mir_built
  29:        0x10b2c101c - rustc_mir_transform[14b1ee1c0cc88243]::check_unsafety::unsafety_check_result
  30:        0x10b2bd4c4 - <rustc_mir_transform[14b1ee1c0cc88243]::check_unsafety::provide::{closure#0} as core[198aa58134b92319]::ops::function::FnOnce<(rustc_middle[3050b1c8d92b003]::ty::context::TyCtxt, rustc_span[5d1b0ba83b8f57fc]::def_id::LocalDefId)>>::call_once
  31:        0x10bd2b508 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::unsafety_check_result, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  32:        0x10be7f67c - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::unsafety_check_result
  33:        0x10b2bf718 - <rustc_mir_transform[14b1ee1c0cc88243]::check_unsafety::UnsafetyChecker as rustc_middle[3050b1c8d92b003]::mir::visit::Visitor>::visit_rvalue
  34:        0x10b2c112c - rustc_mir_transform[14b1ee1c0cc88243]::check_unsafety::unsafety_check_result
  35:        0x10b2bd4c4 - <rustc_mir_transform[14b1ee1c0cc88243]::check_unsafety::provide::{closure#0} as core[198aa58134b92319]::ops::function::FnOnce<(rustc_middle[3050b1c8d92b003]::ty::context::TyCtxt, rustc_span[5d1b0ba83b8f57fc]::def_id::LocalDefId)>>::call_once
  36:        0x10bd2b508 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::unsafety_check_result, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  37:        0x10be7f67c - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::unsafety_check_result
  38:        0x10b2ddfd0 - rustc_mir_transform[14b1ee1c0cc88243]::mir_const
  39:        0x10bd9cb94 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::mir_const, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  40:        0x10be7a504 - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::mir_const
  41:        0x10b2de824 - rustc_mir_transform[14b1ee1c0cc88243]::mir_promoted
  42:        0x10bc9cc38 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::mir_promoted, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  43:        0x10be7af44 - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::mir_promoted
  44:        0x10b83f41c - rustc_borrowck[87ac93b10043328d]::mir_borrowck
  45:        0x10b8243e8 - <rustc_borrowck[87ac93b10043328d]::provide::{closure#0} as core[198aa58134b92319]::ops::function::FnOnce<(rustc_middle[3050b1c8d92b003]::ty::context::TyCtxt, rustc_span[5d1b0ba83b8f57fc]::def_id::LocalDefId)>>::call_once
  46:        0x10bc9ad4c - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::mir_borrowck, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  47:        0x10be822e8 - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::mir_borrowck
  48:        0x108de5278 - rustc_data_structures[e7b9553464f28486]::sync::par_for_each_in::<&[rustc_span[5d1b0ba83b8f57fc]::def_id::LocalDefId], <rustc_middle[3050b1c8d92b003]::hir::map::Map>::par_body_owners<rustc_interface[15e68b5497950d4d]::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
  49:        0x108d8dcf8 - <rustc_session[c2529cdbfecf5e3b]::session::Session>::time::<(), rustc_interface[15e68b5497950d4d]::passes::analysis::{closure#2}>
  50:        0x108d6abf8 - rustc_interface[15e68b5497950d4d]::passes::analysis
  51:        0x10bd904d0 - rustc_query_system[850bbbe679bd754c]::query::plumbing::try_execute_query::<rustc_query_impl[e3399835318cd2ff]::queries::analysis, rustc_query_impl[e3399835318cd2ff]::plumbing::QueryCtxt>
  52:        0x10be78090 - <rustc_query_impl[e3399835318cd2ff]::Queries as rustc_middle[3050b1c8d92b003]::ty::query::QueryEngine>::analysis
  53:        0x108d3efa0 - <rustc_middle[3050b1c8d92b003]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[fe7592cf9605ddfa]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>
  54:        0x108d28008 - <rustc_interface[15e68b5497950d4d]::interface::Compiler>::enter::<rustc_driver_impl[fe7592cf9605ddfa]::run_compiler::{closure#1}::{closure#2}, core[198aa58134b92319]::result::Result<core[198aa58134b92319]::option::Option<rustc_interface[15e68b5497950d4d]::queries::Linker>, rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>
  55:        0x108ce81ac - rustc_span[5d1b0ba83b8f57fc]::with_source_map::<core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>, rustc_interface[15e68b5497950d4d]::interface::run_compiler<core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>, rustc_driver_impl[fe7592cf9605ddfa]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  56:        0x108cf5240 - std[42e4d38c6d446ced]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[15e68b5497950d4d]::util::run_in_thread_pool_with_globals<rustc_interface[15e68b5497950d4d]::interface::run_compiler<core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>, rustc_driver_impl[fe7592cf9605ddfa]::run_compiler::{closure#1}>::{closure#0}, core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>
  57:        0x108cecac0 - <<std[42e4d38c6d446ced]::thread::Builder>::spawn_unchecked_<rustc_interface[15e68b5497950d4d]::util::run_in_thread_pool_with_globals<rustc_interface[15e68b5497950d4d]::interface::run_compiler<core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>, rustc_driver_impl[fe7592cf9605ddfa]::run_compiler::{closure#1}>::{closure#0}, core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[198aa58134b92319]::result::Result<(), rustc_span[5d1b0ba83b8f57fc]::ErrorGuaranteed>>::{closure#1} as core[198aa58134b92319]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  58:        0x100b63bac - std::sys::unix::thread::Thread::new::thread_start::hcfe14f9f8cdec9a0
  59:        0x19174a06c - __pthread_deallocate

error: 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 1.70.0-nightly (da7c50c08 2023-03-19) running on aarch64-apple-darwin```

</p>
</details>

[matthiaskrgr]

probably duplicate of #108683

[chenyukang]

Yes, we could close this one after the PR is merged.