ice: upper case acronyms, unnamed_fields

[matthiaskrgr]

Summary

requires rust-lang/rust#115367

#![allow(incomplete_features)]
#![feature(unnamed_fields)]

#[repr(C)]
struct Foo {
    _: struct {
    },
}


fn main() {}

Version

rustc 1.78.0-nightly (b381d3ab2 2024-02-12)
binary: rustc
commit-hash: b381d3ab27f788f990551100c4425bb782d26d76
commit-date: 2024-02-12
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 17.0.6

Error output

Backtrace

warning: struct `Foo` is never constructed
--> field_access.rs:9:8
|
9 | struct Foo {
|        ^^^
|
= note: `#[warn(dead_code)]` on by default

thread 'rustc' panicked at src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs:66:46:
called `Option::unwrap()` on a `None` value
stack backtrace:
 0:     0x7fba2179b476 - std::backtrace_rs::backtrace::libunwind::trace::h3f288a3148e8bb15
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
 1:     0x7fba2179b476 - std::backtrace_rs::backtrace::trace_unsynchronized::h7277353061928bc0
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
 2:     0x7fba2179b476 - std::sys_common::backtrace::_print_fmt::hbf79f06a8c92ca0e
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys_common/backtrace.rs:68:5
 3:     0x7fba2179b476 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0afd1ff8e38a8a84
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys_common/backtrace.rs:44:22
 4:     0x7fba217ee030 - core::fmt::rt::Argument::fmt::h7f26a9b6a6522b09
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/core/src/fmt/rt.rs:142:9
 5:     0x7fba217ee030 - core::fmt::write::he7de9de816f98016
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/core/src/fmt/mod.rs:1120:17
 6:     0x7fba2178ec6f - std::io::Write::write_fmt::h38e65bf4265dc66c
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/io/mod.rs:1854:15
 7:     0x7fba2179b254 - std::sys_common::backtrace::_print::hf1424a842a74edeb
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys_common/backtrace.rs:47:5
 8:     0x7fba2179b254 - std::sys_common::backtrace::print::hbb43acdb160822bd
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys_common/backtrace.rs:34:9
 9:     0x7fba2179e047 - std::panicking::default_hook::{{closure}}::h9c602a562527e529
10:     0x7fba2179dda9 - std::panicking::default_hook::h9cb3bf5f6c73326f
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/panicking.rs:292:9
11:     0x7fba1e55cfdc - std[73253c920228642]::panicking::update_hook::<alloc[940273873142bb35]::boxed::Box<rustc_driver_impl[f037f419b039420a]::install_ice_hook::{closure#0}>>::{closure#0}
12:     0x7fba2179e796 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1e0fe9ec90d27cc3
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/alloc/src/boxed.rs:2030:9
13:     0x7fba2179e796 - std::panicking::rust_panic_with_hook::hb5ad56797fd964c4
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/panicking.rs:785:13
14:     0x7fba2179e4a9 - std::panicking::begin_panic_handler::{{closure}}::hd364aeee29433213
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/panicking.rs:651:13
15:     0x7fba2179b976 - std::sys_common::backtrace::__rust_end_short_backtrace::ha10bb1568b9ec73d
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys_common/backtrace.rs:171:18
16:     0x7fba2179e234 - rust_begin_unwind
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/panicking.rs:647:5
17:     0x7fba217ea785 - core::panicking::panic_fmt::h91fa7152f33c7717
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/core/src/panicking.rs:72:14
18:     0x7fba217ea843 - core::panicking::panic::hd1dee23cbb6390f9
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/core/src/panicking.rs:144:5
19:     0x7fba217ea516 - core::option::unwrap_failed::h8567a40948315a82
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/core/src/option.rs:1983:5
20:     0x55e09361b7bc - clippy_lints[131ede36f98d4442]::upper_case_acronyms::check_ident
21:     0x7fba1e8d2c7e - <rustc_lint[f6359b7d3f6d639b]::late::LateContextAndPass<rustc_lint[f6359b7d3f6d639b]::late::RuntimeCombinedLateLintPass> as rustc_hir[6019942fb8e590f1]::intravisit::Visitor>::visit_item
22:     0x7fba1e8d4ee7 - <rustc_lint[f6359b7d3f6d639b]::late::LateContextAndPass<rustc_lint[f6359b7d3f6d639b]::late::RuntimeCombinedLateLintPass> as rustc_hir[6019942fb8e590f1]::intravisit::Visitor>::visit_variant_data
23:     0x7fba1e8d3135 - <rustc_lint[f6359b7d3f6d639b]::late::LateContextAndPass<rustc_lint[f6359b7d3f6d639b]::late::RuntimeCombinedLateLintPass> as rustc_hir[6019942fb8e590f1]::intravisit::Visitor>::visit_item
24:     0x7fba1e8d505a - <rustc_lint[f6359b7d3f6d639b]::late::LateContextAndPass<rustc_lint[f6359b7d3f6d639b]::late::RuntimeCombinedLateLintPass> as rustc_hir[6019942fb8e590f1]::intravisit::Visitor>::visit_mod
25:     0x7fba202f012b - rustc_lint[f6359b7d3f6d639b]::late::check_crate::{closure#0}
26:     0x7fba202f0409 - rustc_lint[f6359b7d3f6d639b]::late::check_crate
27:     0x7fba201e13d2 - rustc_interface[ceb207a8fb5539d]::passes::analysis
28:     0x7fba201e005f - rustc_query_impl[b78e7f0549dc02d3]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b78e7f0549dc02d3]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dbb6cff8550fbced]::query::erase::Erased<[u8; 1usize]>>
29:     0x7fba206c6064 - rustc_query_system[74854bfa6cddafab]::query::plumbing::try_execute_query::<rustc_query_impl[b78e7f0549dc02d3]::DynamicConfig<rustc_query_system[74854bfa6cddafab]::query::caches::SingleCache<rustc_middle[dbb6cff8550fbced]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[b78e7f0549dc02d3]::plumbing::QueryCtxt, false>
30:     0x7fba206c5dc7 - rustc_query_impl[b78e7f0549dc02d3]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
31:     0x7fba205409fb - rustc_interface[ceb207a8fb5539d]::interface::run_compiler::<core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>, rustc_driver_impl[f037f419b039420a]::run_compiler::{closure#0}>::{closure#0}
32:     0x7fba2076ef12 - std[73253c920228642]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[ceb207a8fb5539d]::util::run_in_thread_with_globals<rustc_interface[ceb207a8fb5539d]::util::run_in_thread_pool_with_globals<rustc_interface[ceb207a8fb5539d]::interface::run_compiler<core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>, rustc_driver_impl[f037f419b039420a]::run_compiler::{closure#0}>::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>
33:     0x7fba2076ed3e - <<std[73253c920228642]::thread::Builder>::spawn_unchecked_<rustc_interface[ceb207a8fb5539d]::util::run_in_thread_with_globals<rustc_interface[ceb207a8fb5539d]::util::run_in_thread_pool_with_globals<rustc_interface[ceb207a8fb5539d]::interface::run_compiler<core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>, rustc_driver_impl[f037f419b039420a]::run_compiler::{closure#0}>::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ed182bbac36ed604]::result::Result<(), rustc_span[a4806a91d128f927]::ErrorGuaranteed>>::{closure#1} as core[ed182bbac36ed604]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
34:     0x7fba217a7985 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h37d86e7af57ec8cf
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/alloc/src/boxed.rs:2016:9
35:     0x7fba217a7985 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h99a2218ed45ac1ce
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/alloc/src/boxed.rs:2016:9
36:     0x7fba217a7985 - std::sys::pal::unix::thread::Thread::new::thread_start::h6344e9d30547345d
                             at /rustc/b381d3ab27f788f990551100c4425bb782d26d76/library/std/src/sys/pal/unix/thread.rs:108:17
37:     0x7fba1b5879eb - <unknown>
38:     0x7fba1b60b7cc - <unknown>
39:                0x0 - <unknown>

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new?template=ice.yml

note: please attach the file at `/tmp/im/rustc-ice-2024-02-12T20_21_49-984495.txt` to your bug report

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
note: Clippy version: clippy 0.1.78 (b381d3a 2024-02-12)

warning: 1 warning emitted