ICE: dead: `non-ADT in struct pattern`

[matthiaskrgr]

auto-reduced (treereduce-rust):

fn f() -> isize {
    let mut x: isize;
    for _ in 0..0 {
        let s = [(); {
            let mut n = 113383;
            while n != 0 {}
            n
        }];
    }
    return x;
}

fn main() {
    f();
}

original:

fn f() -> isize {
    let mut x: isize;
    for _ in 0..0 {
    // Tests the Collatz conjecture with an incorrect base case (0 instead of 1).
    // The value of `n` will loop indefinitely (4 - 2 - 1 - 4).
    let s = [(); {
        let mut n = 113383; // #20 in https://oeis.org/A006884
        while n != 0 {
            //~^ ERROR is taking a long time
            n = if n % 2 == 0 { n / 2 } else { 3 * n + 1 };
        }
        n
    }];

    s.nonexistent_method();
}
    return x; //~ ERROR E0381
}

fn main() { f(); }

Version information

rustc 1.80.0-nightly (20483b682 2024-05-20)
binary: rustc
commit-hash: 20483b68265f64de79442cf489a5316f918578f0
commit-date: 2024-05-20
host: x86_64-unknown-linux-gnu
release: 1.80.0-nightly
LLVM version: 18.1.6

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

warning: variable does not need to be mutable
 --> /tmp/icemaker_global_tempdir.zzqBIXw6v8FA/rustc_testrunner_tmpdir_reporting.yUVZ0OKyKfyq/mvce.rs:5:17
  |
5 |             let mut n = 113383;
  |                 ----^
  |                 |
  |                 help: remove this `mut`
  |
  = note: `#[warn(unused_mut)]` on by default

error: constant evaluation is taking a long time
 --> /tmp/icemaker_global_tempdir.zzqBIXw6v8FA/rustc_testrunner_tmpdir_reporting.yUVZ0OKyKfyq/mvce.rs:6:13
  |
6 |             while n != 0 {}
  |             ^^^^^^^^^^^^^^^
  |
  = note: this lint makes sure the compiler doesn't get stuck due to infinite loops in const eval.
          If your compilation actually takes a long time, you can safely allow the lint.
help: the constant being evaluated
 --> /tmp/icemaker_global_tempdir.zzqBIXw6v8FA/rustc_testrunner_tmpdir_reporting.yUVZ0OKyKfyq/mvce.rs:4:22
  |
4 |           let s = [(); {
  |  ______________________^
5 | |             let mut n = 113383;
6 | |             while n != 0 {}
7 | |             n
8 | |         }];
  | |_________^
  = note: `#[deny(long_running_const_eval)]` on by default

error: internal compiler error: compiler/rustc_passes/src/dead.rs:232:18: non-ADT in struct pattern
 --> /tmp/icemaker_global_tempdir.zzqBIXw6v8FA/rustc_testrunner_tmpdir_reporting.yUVZ0OKyKfyq/mvce.rs:3:5
  |
3 | /     for _ in 0..0 {
4 | |         let s = [(); {
5 | |             let mut n = 113383;
6 | |             while n != 0 {}
7 | |             n
8 | |         }];
9 | |     }
  | |_____^

thread 'rustc' panicked at compiler/rustc_passes/src/dead.rs:232:18:
Box<dyn Any>
stack backtrace:
   0:     0x71722aa7eb85 - std::backtrace_rs::backtrace::libunwind::trace::he6da4379aff6142d
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x71722aa7eb85 - std::backtrace_rs::backtrace::trace_unsynchronized::h04955c5653afdd1c
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x71722aa7eb85 - std::sys_common::backtrace::_print_fmt::hc30939011ed55196
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x71722aa7eb85 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf756b4bf3ddd605a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x71722aacdc7b - core::fmt::rt::Argument::fmt::h9c42aecae17e95df
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/rt.rs:165:63
   5:     0x71722aacdc7b - core::fmt::write::h3aabe8e1c19492ff
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/mod.rs:1169:21
   6:     0x71722aa7390f - std::io::Write::write_fmt::hbc02e2e90412ba60
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/io/mod.rs:1835:15
   7:     0x71722aa7e95e - std::sys_common::backtrace::_print::h970a746ce9fd1dc8
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x71722aa7e95e - std::sys_common::backtrace::print::hd00c4744cd708d80
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x71722aa81359 - std::panicking::default_hook::{{closure}}::h256ffa346f3a5cd0
  10:     0x71722aa8109d - std::panicking::default_hook::h56b6405526a5971f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:298:9
  11:     0x7172274ee1f0 - std[c5e309103866e771]::panicking::update_hook::<alloc[c591fc82162bd1fd]::boxed::Box<rustc_driver_impl[339cabd2c49c1c37]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x71722aa81a8b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h73ec01f48f3f5e0a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2036:9
  13:     0x71722aa81a8b - std::panicking::rust_panic_with_hook::h06514f03ccbf27e6
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:799:13
  14:     0x71722751dff4 - std[c5e309103866e771]::panicking::begin_panic::<rustc_errors[af6a3578d1bfd0d8]::ExplicitBug>::{closure#0}
  15:     0x71722751abf6 - std[c5e309103866e771]::sys_common::backtrace::__rust_end_short_backtrace::<std[c5e309103866e771]::panicking::begin_panic<rustc_errors[af6a3578d1bfd0d8]::ExplicitBug>::{closure#0}, !>
  16:     0x71722751a8d6 - std[c5e309103866e771]::panicking::begin_panic::<rustc_errors[af6a3578d1bfd0d8]::ExplicitBug>
  17:     0x7172275271b1 - <rustc_errors[af6a3578d1bfd0d8]::diagnostic::BugAbort as rustc_errors[af6a3578d1bfd0d8]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x717227c23e98 - <rustc_errors[af6a3578d1bfd0d8]::DiagCtxt>::span_bug::<rustc_span[2dc48e59aa1d19e]::span_encoding::Span, alloc[c591fc82162bd1fd]::string::String>
  19:     0x717227c3766d - rustc_middle[1a9664e0085f2636]::util::bug::opt_span_bug_fmt::<rustc_span[2dc48e59aa1d19e]::span_encoding::Span>::{closure#0}
  20:     0x717227c3769a - rustc_middle[1a9664e0085f2636]::ty::context::tls::with_opt::<rustc_middle[1a9664e0085f2636]::util::bug::opt_span_bug_fmt<rustc_span[2dc48e59aa1d19e]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x717227c31d3b - rustc_middle[1a9664e0085f2636]::ty::context::tls::with_context_opt::<rustc_middle[1a9664e0085f2636]::ty::context::tls::with_opt<rustc_middle[1a9664e0085f2636]::util::bug::opt_span_bug_fmt<rustc_span[2dc48e59aa1d19e]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x717227c2fa07 - rustc_middle[1a9664e0085f2636]::util::bug::span_bug_fmt::<rustc_span[2dc48e59aa1d19e]::span_encoding::Span>
  23:     0x717228c1d0bf - <rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_pat
  24:     0x717228c1981a - <rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  25:     0x717228c18c82 - rustc_hir[b268f985175477dc]::intravisit::walk_block::<rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor>
  26:     0x717228c19832 - <rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  27:     0x717228c18c82 - rustc_hir[b268f985175477dc]::intravisit::walk_block::<rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor>
  28:     0x717228c1d8be - rustc_hir[b268f985175477dc]::intravisit::walk_item::<rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor>
  29:     0x717228c2113a - <rustc_passes[a9ae99b733236bbd]::dead::MarkSymbolVisitor>::mark_live_symbols
  30:     0x717228f1dc4a - rustc_passes[a9ae99b733236bbd]::dead::live_symbols_and_ignored_derived_traits
  31:     0x7172295d2298 - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::live_symbols_and_ignored_derived_traits::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 8usize]>>
  32:     0x7172295d1592 - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::SingleCache<rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  33:     0x7172295d0dc2 - rustc_query_impl[9ed179a0f1d308f7]::query_impl::live_symbols_and_ignored_derived_traits::get_query_non_incr::__rust_end_short_backtrace
  34:     0x717228f1abec - rustc_passes[a9ae99b733236bbd]::dead::check_mod_deathness
  35:     0x717228f1aa63 - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::check_mod_deathness::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>
  36:     0x717229307b3d - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::DefaultCache<rustc_span[2dc48e59aa1d19e]::def_id::LocalModDefId, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  37:     0x71722930ba3f - rustc_query_impl[9ed179a0f1d308f7]::query_impl::check_mod_deathness::get_query_non_incr::__rust_end_short_backtrace
  38:     0x71722930e5b9 - rustc_interface[1cae66118a42494d]::passes::analysis
  39:     0x71722930db1b - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>
  40:     0x7172295d2a65 - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::SingleCache<rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  41:     0x7172295d27c9 - rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  42:     0x71722940434e - rustc_interface[1cae66118a42494d]::interface::run_compiler::<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}
  43:     0x7172293f1cc9 - std[c5e309103866e771]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>
  44:     0x7172293f1a76 - <<std[c5e309103866e771]::thread::Builder>::spawn_unchecked_<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#2} as core[3219cb84013fadfb]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  45:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h26d0e5dfdd9c0f2f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  46:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hdf40085d252d7219
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  47:     0x71722aa8b86b - std::sys::pal::unix::thread::Thread::new::thread_start::hb8758c3a30e7eae2
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys/pal/unix/thread.rs:108:17
  48:     0x7172242aa1cf - <unknown>
  49:     0x71722432b6ec - <unknown>
  50:                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 make sure that you have updated to the latest nightly

note: rustc 1.80.0-nightly (20483b682 2024-05-20) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [live_symbols_and_ignored_derived_traits] finding live symbols in crate
#1 [check_mod_deathness] checking deathness of variables in top-level module
end of query stack
thread 'rustc' panicked at compiler/rustc_lint/src/builtin.rs:255:18:
struct pattern type is not an ADT
stack backtrace:
   0:     0x71722aa7eb85 - std::backtrace_rs::backtrace::libunwind::trace::he6da4379aff6142d
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x71722aa7eb85 - std::backtrace_rs::backtrace::trace_unsynchronized::h04955c5653afdd1c
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x71722aa7eb85 - std::sys_common::backtrace::_print_fmt::hc30939011ed55196
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x71722aa7eb85 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf756b4bf3ddd605a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x71722aacdc7b - core::fmt::rt::Argument::fmt::h9c42aecae17e95df
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/rt.rs:165:63
   5:     0x71722aacdc7b - core::fmt::write::h3aabe8e1c19492ff
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/mod.rs:1169:21
   6:     0x71722aa7390f - std::io::Write::write_fmt::hbc02e2e90412ba60
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/io/mod.rs:1835:15
   7:     0x71722aa7e95e - std::sys_common::backtrace::_print::h970a746ce9fd1dc8
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x71722aa7e95e - std::sys_common::backtrace::print::hd00c4744cd708d80
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x71722aa81359 - std::panicking::default_hook::{{closure}}::h256ffa346f3a5cd0
  10:     0x71722aa8109d - std::panicking::default_hook::h56b6405526a5971f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:298:9
  11:     0x7172274ee1f0 - std[c5e309103866e771]::panicking::update_hook::<alloc[c591fc82162bd1fd]::boxed::Box<rustc_driver_impl[339cabd2c49c1c37]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x71722aa81a8b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h73ec01f48f3f5e0a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2036:9
  13:     0x71722aa81a8b - std::panicking::rust_panic_with_hook::h06514f03ccbf27e6
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:799:13
  14:     0x71722aa81804 - std::panicking::begin_panic_handler::{{closure}}::hdc456e662baa956f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:664:13
  15:     0x71722aa7f049 - std::sys_common::backtrace::__rust_end_short_backtrace::he43c53287432c969
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x71722aa81537 - rust_begin_unwind
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:652:5
  17:     0x71722aaca243 - core::panicking::panic_fmt::h024d3c362d0de7b2
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/panicking.rs:72:14
  18:     0x71722aaca3fc - core::panicking::panic_display::h2002a5effac02b61
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/panicking.rs:262:5
  19:     0x71722aac9fec - core::option::expect_failed::h45e7b2795e933934
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/option.rs:1994:5
  20:     0x7172288a32f3 - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_pat
  21:     0x7172288aa2e0 - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  22:     0x7172288a5558 - rustc_hir[b268f985175477dc]::intravisit::walk_block::<rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass>>
  23:     0x7172288aa082 - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  24:     0x7172288aa2f9 - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  25:     0x7172288a9ffb - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  26:     0x7172288a5558 - rustc_hir[b268f985175477dc]::intravisit::walk_block::<rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass>>
  27:     0x717228a4bd9c - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_nested_body
  28:     0x717228a45543 - <rustc_lint[27457a7e2c080a19]::late::LateContextAndPass<rustc_lint[27457a7e2c080a19]::BuiltinCombinedModuleLateLintPass> as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_nested_item
  29:     0x717228a43929 - rustc_lint[27457a7e2c080a19]::lint_mod
  30:     0x717228a43721 - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::lint_mod::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>
  31:     0x717229307b3d - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::DefaultCache<rustc_span[2dc48e59aa1d19e]::def_id::LocalModDefId, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  32:     0x7172293059bf - rustc_query_impl[9ed179a0f1d308f7]::query_impl::lint_mod::get_query_non_incr::__rust_end_short_backtrace
  33:     0x717229305599 - rustc_lint[27457a7e2c080a19]::late::check_crate::{closure#1}
  34:     0x717229304fc0 - rustc_lint[27457a7e2c080a19]::late::check_crate
  35:     0x71722930e613 - rustc_interface[1cae66118a42494d]::passes::analysis
  36:     0x71722930db1b - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>
  37:     0x7172295d2a65 - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::SingleCache<rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  38:     0x7172295d27c9 - rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  39:     0x71722940434e - rustc_interface[1cae66118a42494d]::interface::run_compiler::<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}
  40:     0x7172293f1cc9 - std[c5e309103866e771]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>
  41:     0x7172293f1a76 - <<std[c5e309103866e771]::thread::Builder>::spawn_unchecked_<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#2} as core[3219cb84013fadfb]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  42:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h26d0e5dfdd9c0f2f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  43:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hdf40085d252d7219
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  44:     0x71722aa8b86b - std::sys::pal::unix::thread::Thread::new::thread_start::hb8758c3a30e7eae2
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys/pal/unix/thread.rs:108:17
  45:     0x7172242aa1cf - <unknown>
  46:     0x71722432b6ec - <unknown>
  47:                0x0 - <unknown>

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: please make sure that you have updated to the latest nightly

note: rustc 1.80.0-nightly (20483b682 2024-05-20) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [lint_mod] linting top-level module
#1 [analysis] running analysis passes on this crate
end of query stack
thread 'rustc' panicked at compiler/rustc_privacy/src/lib.rs:983:72:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:     0x71722aa7eb85 - std::backtrace_rs::backtrace::libunwind::trace::he6da4379aff6142d
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x71722aa7eb85 - std::backtrace_rs::backtrace::trace_unsynchronized::h04955c5653afdd1c
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x71722aa7eb85 - std::sys_common::backtrace::_print_fmt::hc30939011ed55196
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x71722aa7eb85 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf756b4bf3ddd605a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x71722aacdc7b - core::fmt::rt::Argument::fmt::h9c42aecae17e95df
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/rt.rs:165:63
   5:     0x71722aacdc7b - core::fmt::write::h3aabe8e1c19492ff
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/fmt/mod.rs:1169:21
   6:     0x71722aa7390f - std::io::Write::write_fmt::hbc02e2e90412ba60
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/io/mod.rs:1835:15
   7:     0x71722aa7e95e - std::sys_common::backtrace::_print::h970a746ce9fd1dc8
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x71722aa7e95e - std::sys_common::backtrace::print::hd00c4744cd708d80
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x71722aa81359 - std::panicking::default_hook::{{closure}}::h256ffa346f3a5cd0
  10:     0x71722aa8109d - std::panicking::default_hook::h56b6405526a5971f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:298:9
  11:     0x7172274ee1f0 - std[c5e309103866e771]::panicking::update_hook::<alloc[c591fc82162bd1fd]::boxed::Box<rustc_driver_impl[339cabd2c49c1c37]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x71722aa81a8b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h73ec01f48f3f5e0a
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2036:9
  13:     0x71722aa81a8b - std::panicking::rust_panic_with_hook::h06514f03ccbf27e6
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:799:13
  14:     0x71722aa817cb - std::panicking::begin_panic_handler::{{closure}}::hdc456e662baa956f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:656:13
  15:     0x71722aa7f049 - std::sys_common::backtrace::__rust_end_short_backtrace::he43c53287432c969
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x71722aa81537 - rust_begin_unwind
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/panicking.rs:652:5
  17:     0x71722aaca243 - core::panicking::panic_fmt::h024d3c362d0de7b2
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/panicking.rs:72:14
  18:     0x71722aaca2ec - core::panicking::panic::h12f4d8e9147f72ae
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/panicking.rs:146:5
  19:     0x71722aac9fc9 - core::option::unwrap_failed::hd990e365af457934
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/core/src/option.rs:1984:5
  20:     0x7172288c39e8 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  21:     0x7172288c3043 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  22:     0x7172288c31a8 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  23:     0x7172288c2f61 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  24:     0x7172288c2e82 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_block
  25:     0x7172288c2fa2 - <rustc_privacy[ac658a02c7cc21f4]::NamePrivacyVisitor as rustc_hir[b268f985175477dc]::intravisit::Visitor>::visit_expr
  26:     0x7172288c7247 - rustc_privacy[ac658a02c7cc21f4]::check_mod_privacy
  27:     0x7172288c7089 - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::check_mod_privacy::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>
  28:     0x717229307b3d - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::DefaultCache<rustc_span[2dc48e59aa1d19e]::def_id::LocalModDefId, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  29:     0x71722930b73f - rustc_query_impl[9ed179a0f1d308f7]::query_impl::check_mod_privacy::get_query_non_incr::__rust_end_short_backtrace
  30:     0x71722930e731 - rustc_interface[1cae66118a42494d]::passes::analysis
  31:     0x71722930db1b - rustc_query_impl[9ed179a0f1d308f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>
  32:     0x7172295d2a65 - rustc_query_system[44fec123c527e9c2]::query::plumbing::try_execute_query::<rustc_query_impl[9ed179a0f1d308f7]::DynamicConfig<rustc_query_system[44fec123c527e9c2]::query::caches::SingleCache<rustc_middle[1a9664e0085f2636]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[9ed179a0f1d308f7]::plumbing::QueryCtxt, false>
  33:     0x7172295d27c9 - rustc_query_impl[9ed179a0f1d308f7]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  34:     0x71722940434e - rustc_interface[1cae66118a42494d]::interface::run_compiler::<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}
  35:     0x7172293f1cc9 - std[c5e309103866e771]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>
  36:     0x7172293f1a76 - <<std[c5e309103866e771]::thread::Builder>::spawn_unchecked_<rustc_interface[1cae66118a42494d]::util::run_in_thread_with_globals<rustc_interface[1cae66118a42494d]::util::run_in_thread_pool_with_globals<rustc_interface[1cae66118a42494d]::interface::run_compiler<core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>, rustc_driver_impl[339cabd2c49c1c37]::run_compiler::{closure#0}>::{closure#1}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3219cb84013fadfb]::result::Result<(), rustc_span[2dc48e59aa1d19e]::ErrorGuaranteed>>::{closure#2} as core[3219cb84013fadfb]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h26d0e5dfdd9c0f2f
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  38:     0x71722aa8b86b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hdf40085d252d7219
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/alloc/src/boxed.rs:2022:9
  39:     0x71722aa8b86b - std::sys::pal::unix::thread::Thread::new::thread_start::hb8758c3a30e7eae2
                               at /rustc/20483b68265f64de79442cf489a5316f918578f0/library/std/src/sys/pal/unix/thread.rs:108:17
  40:     0x7172242aa1cf - <unknown>
  41:     0x71722432b6ec - <unknown>
  42:                0x0 - <unknown>

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: please make sure that you have updated to the latest nightly

note: rustc 1.80.0-nightly (20483b682 2024-05-20) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [check_mod_privacy] checking privacy in top-level module
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors; 1 warning emitted

[fmease]

Min:

fn main() {
    for _ in 0..0 {
        [(); loop {}];
    }
}

[matthiaskrgr]

bisects to #121206

[RalfJung]

This doesn't seem const-eval related to me? The panic is nowhere near const-eval, as far a I can see?

Looks like some part of the pattern matching machinery is not properly dealing with the fact that the constant failed to evaluate due to an infinite loop.