clippy panic: broken MIR in Item

[vaivaswatha]

Summary

Here are the steps to repro (I don't have a minimal repro yet - I will update back if I can get one):

git clone https://github.com/vaivaswatha/pliron.git
cd pliron/
git checkout b323bb9ef16f2f42021bfa3703a150d689781080
cargo clippy --workspace

Notes:

1. This problem is new, after I upgraded to 1.83.0
2. cargo build --workspace and cargo build --release --workspace both succeed. It's just clippy that fails.

Version

rustc 1.83.0 (90b35a623 2024-11-26)
binary: rustc
commit-hash: 90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf
commit-date: 2024-11-26
host: x86_64-unknown-linux-gnu
release: 1.83.0
LLVM version: 19.1.1

Error output

Backtrace

stack backtrace:
 0:     0x70bd6d84012a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h5b6bd5631a6d1f6b
 1:     0x70bd6e0218f8 - core::fmt::write::h7550c97b06c86515
 2:     0x70bd6f258b91 - std::io::Write::write_fmt::h7b09c64fe0be9c84
 3:     0x70bd6d83ff82 - std::sys::backtrace::BacktraceLock::print::h2395ccd2c84ba3aa
 4:     0x70bd6d842456 - std::panicking::default_hook::{{closure}}::he19d4c7230e07961
 5:     0x70bd6d8422a0 - std::panicking::default_hook::hf614597d3c67bbdb
 6:     0x70bd6c904556 - std[c6eb78587944e35c]::panicking::update_hook::<alloc[148a978a4a62f5d]::boxed::Box<rustc_driver_impl[4c2d2ad79fb810ac]::install_ice_hook::{closure#0}>>::{closure#0}
 7:     0x70bd6d842b68 - std::panicking::rust_panic_with_hook::h8942133a8b252070
 8:     0x70bd6d84293a - std::panicking::begin_panic_handler::{{closure}}::hb5f5963570096b29
 9:     0x70bd6d8405d9 - std::sys::backtrace::__rust_end_short_backtrace::h6208cedc1922feda
10:     0x70bd6d8425fc - rust_begin_unwind
11:     0x70bd6b2bb160 - core::panicking::panic_fmt::h0c3082644d1bf418
12:     0x70bd6b6223e3 - <rustc_mir_transform[b36c87ceb4bb9a8e]::validate::CfgChecker>::fail::<alloc[148a978a4a62f5d]::string::String>
13:     0x70bd6b621752 - <rustc_mir_transform[b36c87ceb4bb9a8e]::validate::Validator as rustc_mir_transform[b36c87ceb4bb9a8e]::pass_manager::MirPass>::run_pass
14:     0x70bd6e00b674 - rustc_mir_transform[b36c87ceb4bb9a8e]::pass_manager::run_passes_inner
15:     0x70bd6e50a9fa - rustc_mir_transform[b36c87ceb4bb9a8e]::optimized_mir
16:     0x70bd6e508369 - rustc_query_impl[db795c774d495014]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[db795c774d495014]::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 8usize]>>
thread 'rustc' panicked at compiler/rustc_mir_transform/src/validate.rs:95:25:
17:     0x70bd6e45449a - rustc_query_system[b2bb6e43dd6b7fda]::query::plumbing::try_execute_query::<rustc_query_impl[db795c774d495014]::DynamicConfig<rustc_query_system[b2bb6e43dd6b7fda]::query::caches::DefIdCache<rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[db795c774d495014]::plumbing::QueryCtxt, true>
18:     0x70bd6e452aa3 - rustc_query_impl[db795c774d495014]::query_impl::optimized_mir::get_query_incr::__rust_end_short_backtrace
broken MIR in Item(DefId(0:393 ~ pliron_derive[5315]::irfmt::parser::{impl#0}::add_error)) (after phase change to runtime-optimized) at bb1[6]:
Unsize coercion, but `&mut combine::parser::sequence::Skip<combine::parser::sequence::With<combine::parser::error::Expected<combine::parser::repeat::SkipMany<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::error::Expected<combine::parser::token::Satisfy<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, fn(char) -> bool>, &str>>, &str>, combine::parser::choice::Choice<(combine::parser::combinator::Map<(combine::parser::token::Position<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::sequence::Between<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::range::Recognize<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::repeat::Escaped<combine::parser::range::TakeWhile1<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, {closure@pliron-derive/src/irfmt/parser.rs:60:21: 60:24}>, combine::parser::token::OneOf<std::str::Chars<'_>, combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, char>>>), {closure@pliron-derive/src/irfmt/parser.rs:65:27: 65:37}>, combine::parser::combinator::Map<(combine::parser::token::Position<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::sequence::With<combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::range::TakeWhile1<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, {closure@pliron-derive/src/irfmt/parser.rs:69:43: 69:52}>>), {closure@pliron-derive/src/irfmt/parser.rs:70:27: 70:48}>, combine::parser::combinator::Map<(combine::parser::token::Position<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::sequence::Skip<combine::parser::range::TakeWhile1<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, {closure@pliron-derive/src/irfmt/parser.rs:77:28: 77:37}>, combine::parser::error::Expected<combine::parser::repeat::SkipMany<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::error::Expected<combine::parser::token::Satisfy<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, fn(char) -> bool>, &str>>, &str>>, combine::parser::choice::Optional<combine::parser::sequence::Between<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>, combine::parser::repeat::SepBy<std::vec::Vec<irfmt::Elem>, irfmt::parser::parse_fmt_elem<'_>, combine::parser::token::Token<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>>>>), {closure@pliron-derive/src/irfmt/parser.rs:79:44: 79:63}>)>>, combine::parser::error::Expected<combine::parser::repeat::SkipMany<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, combine::parser::error::Expected<combine::parser::token::Satisfy<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, fn(char) -> bool>, &str>>, &str>>` isn't coercible to `&mut dyn combine::Parser<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, Output = irfmt::Elem, PartialState = <impl combine::Parser<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>, Output = irfmt::Elem> as combine::Parser<combine::stream::position::Stream<&str, combine::stream::position::IndexPositioner>>>::PartialState>`
stack backtrace:
19:     0x5ed8cf090f89 - <clippy_lints[3905b9192512dd7f]::redundant_clone::RedundantClone as rustc_lint[81f7d26bc10db165]::passes::LateLintPass>::check_fn
20:     0x70bd6ce3e4f5 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_fn
21:     0x70bd6ce278e5 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
22:     0x70bd6ce26925 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
23:     0x70bd6ce26925 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
24:     0x70bd6e8e6a8e - rustc_lint[81f7d26bc10db165]::late::check_crate
25:     0x70bd6e8e754e - rustc_interface[88a02114bbdb2383]::passes::analysis
26:     0x70bd6e8e72c9 - rustc_query_impl[db795c774d495014]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[db795c774d495014]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 1usize]>>
27:     0x70bd6effe46e - rustc_query_system[b2bb6e43dd6b7fda]::query::plumbing::try_execute_query::<rustc_query_impl[db795c774d495014]::DynamicConfig<rustc_query_system[b2bb6e43dd6b7fda]::query::caches::SingleCache<rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[db795c774d495014]::plumbing::QueryCtxt, true>
28:     0x70bd6effdfb8 - rustc_query_impl[db795c774d495014]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
29:     0x70bd6ed620bb - rustc_interface[88a02114bbdb2383]::interface::run_compiler::<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}
30:     0x70bd6ed533d9 - std[c6eb78587944e35c]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[88a02114bbdb2383]::util::run_in_thread_with_globals<rustc_interface[88a02114bbdb2383]::interface::run_compiler<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>
31:     0x70bd6ee22fac - <<std[c6eb78587944e35c]::thread::Builder>::spawn_unchecked_<rustc_interface[88a02114bbdb2383]::util::run_in_thread_with_globals<rustc_interface[88a02114bbdb2383]::interface::run_compiler<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#1} as core[c06ff78fa456ca03]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
32:     0x70bd6ee23a6b - std::sys::pal::unix::thread::Thread::new::thread_start::hcc78f3943333fa94
 0:     0x718bf584012a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h5b6bd5631a6d1f6b
 1:     0x718bf60218f8 - core::fmt::write::h7550c97b06c86515
 2:     0x718bf7258b91 - std::io::Write::write_fmt::h7b09c64fe0be9c84
 3:     0x718bf583ff82 - std::sys::backtrace::BacktraceLock::print::h2395ccd2c84ba3aa
 4:     0x718bf5842456 - std::panicking::default_hook::{{closure}}::he19d4c7230e07961
 5:     0x718bf58422a0 - std::panicking::default_hook::hf614597d3c67bbdb
 6:     0x718bf4904556 - std[c6eb78587944e35c]::panicking::update_hook::<alloc[148a978a4a62f5d]::boxed::Box<rustc_driver_impl[4c2d2ad79fb810ac]::install_ice_hook::{closure#0}>>::{closure#0}
 7:     0x718bf5842b68 - std::panicking::rust_panic_with_hook::h8942133a8b252070
 8:     0x718bf584293a - std::panicking::begin_panic_handler::{{closure}}::hb5f5963570096b29
 9:     0x718bf58405d9 - std::sys::backtrace::__rust_end_short_backtrace::h6208cedc1922feda
10:     0x718bf58425fc - rust_begin_unwind
11:     0x718bf32bb160 - core::panicking::panic_fmt::h0c3082644d1bf418
12:     0x718bf36223e3 - <rustc_mir_transform[b36c87ceb4bb9a8e]::validate::CfgChecker>::fail::<alloc[148a978a4a62f5d]::string::String>
13:     0x718bf3621752 - <rustc_mir_transform[b36c87ceb4bb9a8e]::validate::Validator as rustc_mir_transform[b36c87ceb4bb9a8e]::pass_manager::MirPass>::run_pass
14:     0x718bf600b674 - rustc_mir_transform[b36c87ceb4bb9a8e]::pass_manager::run_passes_inner
15:     0x718bf650a9fa - rustc_mir_transform[b36c87ceb4bb9a8e]::optimized_mir
16:     0x718bf6508369 - rustc_query_impl[db795c774d495014]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[db795c774d495014]::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 8usize]>>
17:     0x718bf645449a - rustc_query_system[b2bb6e43dd6b7fda]::query::plumbing::try_execute_query::<rustc_query_impl[db795c774d495014]::DynamicConfig<rustc_query_system[b2bb6e43dd6b7fda]::query::caches::DefIdCache<rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[db795c774d495014]::plumbing::QueryCtxt, true>
18:     0x718bf6452aa3 - rustc_query_impl[db795c774d495014]::query_impl::optimized_mir::get_query_incr::__rust_end_short_backtrace
19:     0x651aa2287f89 - <clippy_lints[3905b9192512dd7f]::redundant_clone::RedundantClone as rustc_lint[81f7d26bc10db165]::passes::LateLintPass>::check_fn
20:     0x718bf4e3e4f5 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_fn
21:     0x718bf4e278e5 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
22:     0x718bf4e26925 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
23:     0x718bf4e26925 - <rustc_lint[81f7d26bc10db165]::late::LateContextAndPass<rustc_lint[81f7d26bc10db165]::late::RuntimeCombinedLateLintPass> as rustc_hir[275953cc48a047ea]::intravisit::Visitor>::visit_nested_item
24:     0x718bf68e6a8e - rustc_lint[81f7d26bc10db165]::late::check_crate
25:     0x718bf68e754e - rustc_interface[88a02114bbdb2383]::passes::analysis
26:     0x718bf68e72c9 - rustc_query_impl[db795c774d495014]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[db795c774d495014]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 1usize]>>
27:     0x718bf6ffe46e - rustc_query_system[b2bb6e43dd6b7fda]::query::plumbing::try_execute_query::<rustc_query_impl[db795c774d495014]::DynamicConfig<rustc_query_system[b2bb6e43dd6b7fda]::query::caches::SingleCache<rustc_middle[a886f61dbc61428a]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[db795c774d495014]::plumbing::QueryCtxt, true>
28:     0x718bf6ffdfb8 - rustc_query_impl[db795c774d495014]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
29:     0x718bf6d620bb - rustc_interface[88a02114bbdb2383]::interface::run_compiler::<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}
30:     0x718bf6d533d9 - std[c6eb78587944e35c]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[88a02114bbdb2383]::util::run_in_thread_with_globals<rustc_interface[88a02114bbdb2383]::interface::run_compiler<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>
31:     0x718bf6e22fac - <<std[c6eb78587944e35c]::thread::Builder>::spawn_unchecked_<rustc_interface[88a02114bbdb2383]::util::run_in_thread_with_globals<rustc_interface[88a02114bbdb2383]::interface::run_compiler<core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>, rustc_driver_impl[4c2d2ad79fb810ac]::run_compiler::{closure#0}>::{closure#1}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c06ff78fa456ca03]::result::Result<(), rustc_span[3e5cf3424d44936d]::ErrorGuaranteed>>::{closure#1} as core[c06ff78fa456ca03]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
32:     0x718bf6e23a6b - std::sys::pal::unix::thread::Thread::new::thread_start::hcc78f3943333fa94
33:     0x70bd6909ca94 - start_thread
                             at ./nptl/pthread_create.c:447:8
34:     0x70bd69129c3c - clone3
                             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
35:                0x0 - <unknown>