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ICE error when matching uninitialized constant with constant pattern in Rust #115599

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#116522
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ICE error when matching uninitialized constant with constant pattern in Rust#115599
#116522
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C-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
@iamanonymouscs

Description

@iamanonymouscs
iamanonymouscs
opened on Sep 6, 2023 · edited by rustbot

Code

const CONST_STRING: String = String::new();
fn main() {
    //code
    let empty_str=String::from("");
    if let CONST_STRING = empty_str {
    //code
    }
}

Meta

rustc --version --verbose:

rustc 1.74.0-nightly (a991861ec 2023-09-05)
binary: rustc
commit-hash: a991861ec9fd8aedffbe5744a8852c7c64dd40b2
commit-date: 2023-09-05
host: x86_64-unknown-linux-gnu
release: 1.74.0-nightly
LLVM version: 17.0.0

This bug was also reproduced in the stable version(1.72)

Error output

warning: to use a constant of type `Vec<u8>` in a pattern, `Vec<u8>` must be annotated with `#[derive(PartialEq, Eq)]`
 --> bug.rs:5:12
  |
5 |     if let CONST_STRING = empty_str {
  |            ^^^^^^^^^^^^
  |
  = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
  = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>
  = note: the traits must be derived, manual `impl`s are not sufficient
  = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
  = note: `#[warn(indirect_structural_match)]` on by default
Backtrace 

error: internal compiler error: compiler/rustc_mir_build/src/build/matches/test.rs:244:25: matching on `String` went through without enabling string_deref_patterns

thread 'rustc' panicked at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/compiler/rustc_errors/src/lib.rs:1651:9:
Box<dyn Any>
stack backtrace:
   0:     0x7f53ffd3cbec - std::backtrace_rs::backtrace::libunwind::trace::h1298100820b00e42
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f53ffd3cbec - std::backtrace_rs::backtrace::trace_unsynchronized::h25ae9be29b50d68d
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f53ffd3cbec - std::sys_common::backtrace::_print_fmt::hb0a122c02a9e329f
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f53ffd3cbec - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0785508acad78739
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f53ffda2dfc - core::fmt::rt::Argument::fmt::h367a8235fd3b8ec9
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/core/src/fmt/rt.rs:138:9
   5:     0x7f53ffda2dfc - core::fmt::write::haf0f122656cf716d
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f53ffd2f71e - std::io::Write::write_fmt::h81969da61711600d
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/io/mod.rs:1714:15
   7:     0x7f53ffd3c9d4 - std::sys_common::backtrace::_print::h00e5c4a2e9966b17
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f53ffd3c9d4 - std::sys_common::backtrace::print::hbf7a0e8e19400072
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f53ffd3faca - std::panicking::panic_hook_with_disk_dump::{{closure}}::h27904b15b8804b04
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/panicking.rs:280:22
  10:     0x7f53ffd3f7c5 - std::panicking::panic_hook_with_disk_dump::h0a17a9fc902df4ec
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/panicking.rs:314:9
  11:     0x7f5402ef56d9 - rustc_driver_impl[421f961c2abd6a6c]::install_ice_hook::{closure#0}
  12:     0x7f53ffd40383 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he211df56096a7722
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/alloc/src/boxed.rs:2021:9
  13:     0x7f53ffd40383 - std::panicking::rust_panic_with_hook::h2ec7fb05ba41ff26
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/panicking.rs:757:13
  14:     0x7f540349dac4 - std[2ba0c775535575e]::panicking::begin_panic::<rustc_errors[186b26c5db3132b8]::ExplicitBug>::{closure#0}
  15:     0x7f540349cc56 - std[2ba0c775535575e]::sys_common::backtrace::__rust_end_short_backtrace::<std[2ba0c775535575e]::panicking::begin_panic<rustc_errors[186b26c5db3132b8]::ExplicitBug>::{closure#0}, !>
  16:     0x7f54033f4676 - std[2ba0c775535575e]::panicking::begin_panic::<rustc_errors[186b26c5db3132b8]::ExplicitBug>
  17:     0x7f540347f634 - <rustc_errors[186b26c5db3132b8]::HandlerInner>::bug::<alloc[143706f611eb5894]::string::String>
  18:     0x7f540347f4a6 - <rustc_errors[186b26c5db3132b8]::Handler>::bug::<alloc[143706f611eb5894]::string::String>
  19:     0x7f54034a2f2c - rustc_middle[7266ccbfd6f08af0]::util::bug::opt_span_bug_fmt::<rustc_span[e182e80647a6f439]::span_encoding::Span>::{closure#0}
  20:     0x7f54034a0a6a - rustc_middle[7266ccbfd6f08af0]::ty::context::tls::with_opt::<rustc_middle[7266ccbfd6f08af0]::util::bug::opt_span_bug_fmt<rustc_span[e182e80647a6f439]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f54034a0a38 - rustc_middle[7266ccbfd6f08af0]::ty::context::tls::with_context_opt::<rustc_middle[7266ccbfd6f08af0]::ty::context::tls::with_opt<rustc_middle[7266ccbfd6f08af0]::util::bug::opt_span_bug_fmt<rustc_span[e182e80647a6f439]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f54019968a0 - rustc_middle[7266ccbfd6f08af0]::util::bug::bug_fmt
  23:     0x7f54020ffb6c - <rustc_mir_build[442994af0620fa82]::build::Builder>::match_simplified_candidates
  24:     0x7f54021057ff - <rustc_mir_build[442994af0620fa82]::build::Builder>::match_candidates
  25:     0x7f540138ad37 - <rustc_mir_build[442994af0620fa82]::build::Builder>::lower_match_tree
  26:     0x7f54013a32b9 - <rustc_mir_build[442994af0620fa82]::build::Builder>::lower_let_expr
  27:     0x7f54013944fd - <rustc_mir_build[442994af0620fa82]::build::Builder>::then_else_break
  28:     0x7f54013935c9 - <rustc_mir_build[442994af0620fa82]::build::Builder>::then_else_break
  29:     0x7f540136917a - <rustc_mir_build[442994af0620fa82]::build::Builder>::expr_into_dest
  30:     0x7f5401368722 - <rustc_mir_build[442994af0620fa82]::build::Builder>::expr_into_dest
  31:     0x7f5401398762 - <rustc_mir_build[442994af0620fa82]::build::Builder>::ast_block_stmts
  32:     0x7f540138b568 - <rustc_mir_build[442994af0620fa82]::build::Builder>::ast_block
  33:     0x7f54013668a6 - <rustc_mir_build[442994af0620fa82]::build::Builder>::expr_into_dest
  34:     0x7f5401368722 - <rustc_mir_build[442994af0620fa82]::build::Builder>::expr_into_dest
  35:     0x7f5401368722 - <rustc_mir_build[442994af0620fa82]::build::Builder>::expr_into_dest
  36:     0x7f5401eda8a7 - rustc_mir_build[442994af0620fa82]::build::mir_built
  37:     0x7f5400fff97c - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>
  38:     0x7f5400fff95e - <rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_built::dynamic_query::{closure#2} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<(rustc_middle[7266ccbfd6f08af0]::ty::context::TyCtxt, rustc_span[e182e80647a6f439]::def_id::LocalDefId)>>::call_once
  39:     0x7f54010fa498 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::VecCache<rustc_span[e182e80647a6f439]::def_id::LocalDefId, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  40:     0x7f5402889531 - rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  41:     0x7f54021744e9 - rustc_mir_transform[ebf36c8e57c3f18]::check_unsafety::unsafety_check_result
  42:     0x7f5400fff9bc - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::unsafety_check_result::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>
  43:     0x7f5400fff99e - <rustc_query_impl[e4e476eeb45651d1]::query_impl::unsafety_check_result::dynamic_query::{closure#2} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<(rustc_middle[7266ccbfd6f08af0]::ty::context::TyCtxt, rustc_span[e182e80647a6f439]::def_id::LocalDefId)>>::call_once
  44:     0x7f54010fa498 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::VecCache<rustc_span[e182e80647a6f439]::def_id::LocalDefId, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  45:     0x7f540288fea1 - rustc_query_impl[e4e476eeb45651d1]::query_impl::unsafety_check_result::get_query_non_incr::__rust_end_short_backtrace
  46:     0x7f5402258cea - rustc_mir_transform[ebf36c8e57c3f18]::mir_const
  47:     0x7f540102d4be - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>
  48:     0x7f540102d48e - <rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_const::dynamic_query::{closure#2} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<(rustc_middle[7266ccbfd6f08af0]::ty::context::TyCtxt, rustc_span[e182e80647a6f439]::def_id::LocalDefId)>>::call_once
  49:     0x7f54010fa498 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::VecCache<rustc_span[e182e80647a6f439]::def_id::LocalDefId, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  50:     0x7f54028898a1 - rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_const::get_query_non_incr::__rust_end_short_backtrace
  51:     0x7f5401211a7b - rustc_mir_transform[ebf36c8e57c3f18]::mir_promoted
  52:     0x7f5400fff631 - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 16usize]>>
  53:     0x7f54015ce0e2 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::VecCache<rustc_span[e182e80647a6f439]::def_id::LocalDefId, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  54:     0x7f540288a274 - rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  55:     0x7f5401c9ac83 - rustc_borrowck[b34d41cd82b04a8d]::mir_borrowck
  56:     0x7f540102d45e - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>
  57:     0x7f540102d42e - <rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_borrowck::dynamic_query::{closure#2} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<(rustc_middle[7266ccbfd6f08af0]::ty::context::TyCtxt, rustc_span[e182e80647a6f439]::def_id::LocalDefId)>>::call_once
  58:     0x7f54010fa498 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::VecCache<rustc_span[e182e80647a6f439]::def_id::LocalDefId, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  59:     0x7f5402893b71 - rustc_query_impl[e4e476eeb45651d1]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  60:     0x7f540235a385 - rustc_data_structures[4483c8f9b2693f2d]::sync::par_for_each_in::<&[rustc_span[e182e80647a6f439]::def_id::LocalDefId], <rustc_middle[7266ccbfd6f08af0]::hir::map::Map>::par_body_owners<rustc_interface[e402a4e95d47e40d]::passes::analysis::{closure#1}::{closure#0}>::{closure#0}>
  61:     0x7f540235a0bc - <rustc_session[a813519ed55dc798]::session::Session>::time::<(), rustc_interface[e402a4e95d47e40d]::passes::analysis::{closure#1}>
  62:     0x7f5402359519 - rustc_interface[e402a4e95d47e40d]::passes::analysis
  63:     0x7f540237d5ea - rustc_query_impl[e4e476eeb45651d1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e4e476eeb45651d1]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 1usize]>>
  64:     0x7f540237d5d9 - <rustc_query_impl[e4e476eeb45651d1]::query_impl::analysis::dynamic_query::{closure#2} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<(rustc_middle[7266ccbfd6f08af0]::ty::context::TyCtxt, ())>>::call_once
  65:     0x7f540263bc64 - rustc_query_system[44d60dfb7090b806]::query::plumbing::try_execute_query::<rustc_query_impl[e4e476eeb45651d1]::DynamicConfig<rustc_query_system[44d60dfb7090b806]::query::caches::SingleCache<rustc_middle[7266ccbfd6f08af0]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e4e476eeb45651d1]::plumbing::QueryCtxt, false>
  66:     0x7f540263b9d9 - rustc_query_impl[e4e476eeb45651d1]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  67:     0x7f540240df33 - <rustc_middle[7266ccbfd6f08af0]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[421f961c2abd6a6c]::run_compiler::{closure#1}::{closure#2}::{closure#6}, core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>>
  68:     0x7f540240d03c - <rustc_interface[e402a4e95d47e40d]::interface::Compiler>::enter::<rustc_driver_impl[421f961c2abd6a6c]::run_compiler::{closure#1}::{closure#2}, core[91a7ba3c96b8fb6a]::result::Result<core[91a7ba3c96b8fb6a]::option::Option<rustc_interface[e402a4e95d47e40d]::queries::Linker>, rustc_span[e182e80647a6f439]::ErrorGuaranteed>>
  69:     0x7f5402404a38 - std[2ba0c775535575e]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[e402a4e95d47e40d]::util::run_in_thread_with_globals<rustc_interface[e402a4e95d47e40d]::interface::run_compiler<core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>, rustc_driver_impl[421f961c2abd6a6c]::run_compiler::{closure#1}>::{closure#0}, core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>>
  70:     0x7f54024041ae - <<std[2ba0c775535575e]::thread::Builder>::spawn_unchecked_<rustc_interface[e402a4e95d47e40d]::util::run_in_thread_with_globals<rustc_interface[e402a4e95d47e40d]::interface::run_compiler<core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>, rustc_driver_impl[421f961c2abd6a6c]::run_compiler::{closure#1}>::{closure#0}, core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[91a7ba3c96b8fb6a]::result::Result<(), rustc_span[e182e80647a6f439]::ErrorGuaranteed>>::{closure#1} as core[91a7ba3c96b8fb6a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  71:     0x7f53ffd4ad35 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc5c2793cdb16fd0c
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/alloc/src/boxed.rs:2007:9
  72:     0x7f53ffd4ad35 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd102196bf71bb167
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/alloc/src/boxed.rs:2007:9
  73:     0x7f53ffd4ad35 - std::sys::unix::thread::Thread::new::thread_start::hd2018bce9981ca61
                               at /rustc/a991861ec9fd8aedffbe5744a8852c7c64dd40b2/library/std/src/sys/unix/thread.rs:108:17
  74:     0x7f53ffc0b609 - start_thread
  75:     0x7f53ffb30133 - clone
  76:                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: please attach the file at `/home/code/rustc-ice-2023-09-06T08:50:10.652342838Z-233.txt` to your bug report

query stack during panic:
#0 [mir_built] building MIR for `main`
#1 [unsafety_check_result] unsafety-checking `main`
#2 [mir_const] preparing `main` for borrow checking
#3 [mir_promoted] promoting constants in MIR for `main`
#4 [mir_borrowck] borrow-checking `main`
#5 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error; 1 warning emitted

Activity

iamanonymouscs
added
C-bugCategory: This is a bug.
I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
on Sep 6, 2023
rustbot
added
needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.
on Sep 6, 2023
mu001999

mu001999 commented on Sep 6, 2023

@mu001999
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on Sep 6, 2023
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matthiaskrgr

matthiaskrgr commented on Sep 6, 2023

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on Sep 6, 2023
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Hmm this was caused by #111913 cc @oli-obk

fmease
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kiscad

kiscad commented on Sep 7, 2023

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bvanjoi
mentioned this on Oct 7, 2023
matthiaskrgr
added 2 commits that reference this issue on Oct 11, 2023

Rollup merge of rust-lang#116522 - bvanjoi:fix-115599, r=oli-obk

ae15846

Rollup merge of rust-lang#116522 - bvanjoi:fix-115599, r=oli-obk

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    C-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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        ICE error when matching uninitialized constant with constant pattern in Rust · Issue #115599 · rust-lang/rust