internal compiler error: unexpected panic

[TonalidadeHidrica]

I'm reporting because an unexpected panic happened on running cargo clippy.
On the other hand, cargo check succeeds without a warning.

The problem is that, if I created a new git worktree (that is, made a exact copy of src/, rust-toolchain, Cargo.{toml, lock} but not of target), the error does not reproduce. So I'm not sure what is the appropriate next action.
Here are the code that is causing the error. Also I .tar.gz-ed the current worktree.
I'm now leaving the worktree as-is just in case, so I may respond any troubleshooting steps.

• Versions

❯ rustc --version
rustc 1.57.0 (f1edd0429 2021-11-29)
❯ cargo --version
cargo 1.57.0 (b2e52d7ca 2021-10-21)
❯ export | grep RUST
RUSTC_WRAPPER /Users/username/.cargo/bin/sccache
RUST_BACKTRACE full
❯ 

cargo clippy

❯ cargo clippy
    Checking taiko-wiki-data-analysis v0.1.0 (/Users/username/dev/git/com/github/TonalidadeHidrica/taiko-wiki-data-analysis)
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/compiler/rustc_hir/src/definitions.rs:452:14
stack backtrace:
   0:        0x105d70321 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4edbddd26fc45697
   1:        0x105dc14bb - core::fmt::write::h266c957f12b1655a
   2:        0x105d60d3a - std::io::Write::write_fmt::h65d4ee621e8d810d
   3:        0x105d73585 - std::panicking::default_hook::{{closure}}::h5b4886cd9f93dfca
   4:        0x105d7316f - std::panicking::default_hook::h986d152c7bd7e732
   5:        0x1055aa808 - clippy_driver::ICE_HOOK::{{closure}}::{{closure}}::h3f14c4c90400f63b
   6:        0x105d73dc6 - std::panicking::rust_panic_with_hook::h151f3b3bf37b4f17
   7:        0x105d73814 - std::panicking::begin_panic_handler::{{closure}}::hf6660086d9ebd48c
   8:        0x105d70797 - std::sys_common::backtrace::__rust_end_short_backtrace::h34152178ea368a9a
   9:        0x105d737aa - _rust_begin_unwind
  10:        0x105dec05f - core::panicking::panic_fmt::hb64a2db862b4aca0
  11:        0x105debfb7 - core::panicking::panic::h709f8bbcee9c47c1
  12:        0x1109f6fba - <rustc_query_impl::on_disk_cache::OnDiskCache as rustc_middle::ty::context::OnDiskCache>::def_path_hash_to_def_id::hb730d16bcb9182b2
  13:        0x11163a49c - rustc_middle::dep_graph::dep_node::<impl rustc_query_system::dep_graph::dep_node::DepNodeParams<rustc_middle::ty::context::TyCtxt> for rustc_span::def_id::LocalDefId>::recover::hffc4e6a0830f2648
  14:        0x1108eabe0 - rustc_query_impl::query_callbacks::hir_owner::force_from_dep_node::h1e753a243eb0fce7
  15:        0x11095ea79 - rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green::h5ec984268becc2ed
  16:        0x11095ea50 - rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green::h5ec984268becc2ed
  17:        0x11091ebeb - rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_green::h29c934006e707d96
  18:        0x1106770e8 - rustc_query_system::query::plumbing::ensure_must_run::h34a07367d359ac53
  19:        0x11090c17b - <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::check_mod_item_types::h7207284889faf16e
  20:        0x10fcd0ed7 - rustc_middle::hir::map::Map::for_each_module::hc3d31f925f1e5a38
  21:        0x10fbf8ded - rustc_typeck::check_crate::h639646483ad1f67a
  22:        0x10d2b619f - rustc_interface::passes::analysis::h4f85fbb562aaa2d0
  23:        0x11096b1d8 - rustc_query_system::dep_graph::graph::DepGraph<K>::with_task::h250cbf125cf5c5da
  24:        0x11088d5d5 - rustc_data_structures::stack::ensure_sufficient_stack::h6bf2db115705a40c
  25:        0x11075248c - rustc_query_system::query::plumbing::try_execute_query::hea85233fa9cc2fd4
  26:        0x1109080c5 - <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis::hda9a7d1ffac3bca0
  27:        0x10d1f5211 - rustc_interface::passes::QueryContext::enter::hca7a6b48fcdfcc9c
  28:        0x10d1d3be6 - rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter::h5dd0e3e5d157764e
  29:        0x10d1a420e - rustc_span::with_source_map::h5222a0af0f8eb603
  30:        0x10d1d23ac - scoped_tls::ScopedKey<T>::set::h1d3d67352154478d
  31:        0x10d1a8c32 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb945015c1b1cd51d
  32:        0x10d1fa9a5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc43c9a06b1d9c32a
  33:        0x105d7dba7 - std::sys::unix::thread::Thread::new::thread_start::h1ebadf8a3a1817e4
  34:     0x7fff204268fc - __pthread_start

error: internal compiler error: unexpected panic

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new

note: Clippy version: clippy 0.1.57 (f1edd042 2021-11-29)

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `taiko-wiki-data-analysis`

cargo check

❯ cargo check
    Checking taiko-wiki-data-analysis v0.1.0 (/Users/username/dev/git/com/github/TonalidadeHidrica/taiko-wiki-data-analysis)
error[E0271]: type mismatch resolving `<FlatMap<std::option::Iter<'_, TwoStr<'_>>, TwoStrIter<'_>, [closure@src/pukiwiki_parser/inline.rs:605:70: 605:87]> as Iterator>::Item == Cow<'_, str>`
   --> src/pukiwiki_parser/inline.rs:602:27
    |
602 |     pub fn text(&self) -> impl Iterator<Item = Cow<str>> {
    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected enum `Cow`, found `&str`
    |
    = note:   expected enum `Cow<'_, str>`
            found reference `&str`
note: required because of the requirements on the impl of `Iterator` for `__Enum9216455845793451550<impl Iterator, FlatMap<std::option::Iter<'_, TwoStr<'_>>, TwoStrIter<'_>, [closure@src/pukiwiki_parser/inline.rs:605:70: 605:87]>, std::iter::Empty<Cow<'_, str>>>`
   --> src/pukiwiki_parser/inline.rs:601:5
    |
601 |     #[auto_enum(Iterator)]
    |     ^^^^^^^^^^^^^^^^^^^^^^
    = note: this error originates in the attribute macro `auto_enum` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0271`.
error: could not compile `taiko-wiki-data-analysis` due to previous error

[dswij]

It looks like this is similar to #8095, happens on compiler/rustc_hir/src/definitions.rs:452:14

[TonalidadeHidrica]

@dswij It seems so, and #8095 seems to be similar to #7927, which in turn to rust-lang/rust#89962. With so many similar issues, should I close this issue?

[dswij]

I think we can close this issue, but it's also good to know that the issue is common