ICE: assertion failed: dead_codes.iter().skip(1).all(|id|....

[matthiaskrgr]

snippet:

#[derive(Debug)]
struct Foo(i32);

#[derive(Debug)]
struct ConstainsDropField(Foo, #[allow(unused)] Foo);

Version information

rustc 1.77.0-nightly (2d7be7393 2023-12-23)
binary: rustc
commit-hash: 2d7be73931e0978c8758a672cc7258b417a7e999
commit-date: 2023-12-23
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc --crate-type=lib -Z dump-mir-dir=dir

Program output

thread 'rustc' panicked at compiler/rustc_passes/src/dead.rs:810:9:
assertion failed: dead_codes.iter().skip(1).all(|id|
        {
            let hir_id = tcx.local_def_id_to_hir_id(*id);
            let level =
                tcx.lint_level_at_node(lint::builtin::DEAD_CODE, hir_id).0;
            level == first_lint_level
        })
stack backtrace:
   0:     0x7ff1353fb6f6 - std::backtrace_rs::backtrace::libunwind::trace::h854d9901466ba2a6
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7ff1353fb6f6 - std::backtrace_rs::backtrace::trace_unsynchronized::h2e5473e1358f3d7d
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff1353fb6f6 - std::sys_common::backtrace::_print_fmt::h17999543628ef5b9
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7ff1353fb6f6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd4a315f9d82cb167
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff13544df40 - core::fmt::rt::Argument::fmt::h61d1362a4781e5b2
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/core/src/fmt/rt.rs:142:9
   5:     0x7ff13544df40 - core::fmt::write::hdd3124965f70515e
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/core/src/fmt/mod.rs:1120:17
   6:     0x7ff1353ef53f - std::io::Write::write_fmt::hf681a4235a84103e
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/io/mod.rs:1810:15
   7:     0x7ff1353fb4d4 - std::sys_common::backtrace::_print::hf875b2182006ee31
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ff1353fb4d4 - std::sys_common::backtrace::print::h6091516d06acaa34
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ff1353fe267 - std::panicking::default_hook::{{closure}}::h7008dc256987fa65
  10:     0x7ff1353fdfc9 - std::panicking::default_hook::he81ec00845e2991e
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/panicking.rs:292:9
  11:     0x7ff13215adec - std[76579cbcf5e75e71]::panicking::update_hook::<alloc[b53221f29dc7d1be]::boxed::Box<rustc_driver_impl[5725e9f2ae9a40a2]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7ff1353fe9b6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hfccb34defa5e1891
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/alloc/src/boxed.rs:2029:9
  13:     0x7ff1353fe9b6 - std::panicking::rust_panic_with_hook::ha947ff64165fedb2
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/panicking.rs:783:13
  14:     0x7ff1353fe6c9 - std::panicking::begin_panic_handler::{{closure}}::h7f336a84c52547b7
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/panicking.rs:649:13
  15:     0x7ff1353fbbf6 - std::sys_common::backtrace::__rust_end_short_backtrace::h26cdeb6403f48183
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7ff1353fe460 - rust_begin_unwind
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/panicking.rs:645:5
  17:     0x7ff13544a645 - core::panicking::panic_fmt::h6ec837525499bcbc
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/core/src/panicking.rs:72:14
  18:     0x7ff13544a703 - core::panicking::panic::hcb6de605faec2bad
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/core/src/panicking.rs:144:5
  19:     0x7ff1337e39a3 - <rustc_passes[c95769a7eb953e08]::dead::DeadVisitor>::lint_at_single_level
  20:     0x7ff133df0e88 - <rustc_passes[c95769a7eb953e08]::dead::DeadVisitor>::warn_multiple
  21:     0x7ff1339a3d26 - rustc_passes[c95769a7eb953e08]::dead::check_mod_deathness
  22:     0x7ff1339a35a3 - rustc_query_impl[d4cc752ff0d73f28]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d4cc752ff0d73f28]::query_impl::check_mod_deathness::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3892716d31dc4121]::query::erase::Erased<[u8; 0usize]>>
  23:     0x7ff13404b1bb - rustc_query_system[d117b86e449fcdf2]::query::plumbing::try_execute_query::<rustc_query_impl[d4cc752ff0d73f28]::DynamicConfig<rustc_query_system[d117b86e449fcdf2]::query::caches::DefaultCache<rustc_span[d159d62802098cb3]::def_id::LocalModDefId, rustc_middle[3892716d31dc4121]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[d4cc752ff0d73f28]::plumbing::QueryCtxt, false>
  24:     0x7ff13404c203 - rustc_query_impl[d4cc752ff0d73f28]::query_impl::check_mod_deathness::get_query_non_incr::__rust_end_short_backtrace
  25:     0x7ff133bee128 - rustc_interface[1da9c7dc31a5385c]::passes::analysis
  26:     0x7ff133becf9d - rustc_query_impl[d4cc752ff0d73f28]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d4cc752ff0d73f28]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3892716d31dc4121]::query::erase::Erased<[u8; 1usize]>>
  27:     0x7ff13430f940 - rustc_query_system[d117b86e449fcdf2]::query::plumbing::try_execute_query::<rustc_query_impl[d4cc752ff0d73f28]::DynamicConfig<rustc_query_system[d117b86e449fcdf2]::query::caches::SingleCache<rustc_middle[3892716d31dc4121]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[d4cc752ff0d73f28]::plumbing::QueryCtxt, false>
  28:     0x7ff13430f747 - rustc_query_impl[d4cc752ff0d73f28]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7ff1343a8b12 - rustc_interface[1da9c7dc31a5385c]::interface::run_compiler::<core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>, rustc_driver_impl[5725e9f2ae9a40a2]::run_compiler::{closure#0}>::{closure#0}
  30:     0x7ff13432b486 - std[76579cbcf5e75e71]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1da9c7dc31a5385c]::util::run_in_thread_with_globals<rustc_interface[1da9c7dc31a5385c]::util::run_in_thread_pool_with_globals<rustc_interface[1da9c7dc31a5385c]::interface::run_compiler<core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>, rustc_driver_impl[5725e9f2ae9a40a2]::run_compiler::{closure#0}>::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>
  31:     0x7ff13432b2b3 - <<std[76579cbcf5e75e71]::thread::Builder>::spawn_unchecked_<rustc_interface[1da9c7dc31a5385c]::util::run_in_thread_with_globals<rustc_interface[1da9c7dc31a5385c]::util::run_in_thread_pool_with_globals<rustc_interface[1da9c7dc31a5385c]::interface::run_compiler<core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>, rustc_driver_impl[5725e9f2ae9a40a2]::run_compiler::{closure#0}>::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[730ecc411c8eaf02]::result::Result<(), rustc_span[d159d62802098cb3]::ErrorGuaranteed>>::{closure#1} as core[730ecc411c8eaf02]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:     0x7ff1354088e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hca712a7e6055e033
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/alloc/src/boxed.rs:2015:9
  33:     0x7ff1354088e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h0c4d9df2b2c66b37
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/alloc/src/boxed.rs:2015:9
  34:     0x7ff1354088e5 - std::sys::unix::thread::Thread::new::thread_start::h42e6b966712cbe95
                               at /rustc/2d7be73931e0978c8758a672cc7258b417a7e999/library/std/src/sys/unix/thread.rs:108:17
  35:     0x7ff12f2aa9eb - <unknown>
  36:     0x7ff12f32e7cc - <unknown>
  37:                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: rustc 1.77.0-nightly (2d7be7393 2023-12-23) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -Z dump-mir-dir=dir

query stack during panic:
#0 [check_mod_deathness] checking deathness of variables in top-level module
#1 [analysis] running analysis passes on this crate
end of query stack

[matthiaskrgr]

Regression in #114417

[mu001999]

This seems to be fixed by #118297