ICE: missing_fields_in_debug on `core` ` unexpected non-type Node::GenericParam: Type { default: None, synthetic: false }`

[matthiaskrgr]

Summary

Found by running clippy on rustcs core

Version

rustc 1.72.0-nightly (9eee230cd 2023-06-04)
binary: rustc
commit-hash: 9eee230cd0a56bfba3ce65121798d9f9f4341cdd
commit-date: 2023-06-04
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.4

Error output

Backtrace

Building bootstrap
  Finished dev [unoptimized] target(s) in 0.02s
Checking stage0 library artifacts (x86_64-unknown-linux-gnu)
  Checking core v0.0.0 (/home/matthias/vcs/github/rust/library/core)
 Compiling unwind v0.0.0 (/home/matthias/vcs/github/rust/library/unwind)
 Compiling std v0.0.0 (/home/matthias/vcs/github/rust/library/std)
error: internal compiler error: compiler/rustc_hir_analysis/src/collect/type_of.rs:492:18: unexpected non-type Node::GenericParam: Type { default: None, synthetic: false }

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/compiler/rustc_errors/src/lib.rs:1650:9
stack backtrace:
 0:     0x7f01d5969ba1 - std::backtrace_rs::backtrace::libunwind::trace::h9a9187caf3af91d1
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
 1:     0x7f01d5969ba1 - std::backtrace_rs::backtrace::trace_unsynchronized::hb7edc6b3aa152770
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
 2:     0x7f01d5969ba1 - std::sys_common::backtrace::_print_fmt::h2cb92da4808aa2bb
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/sys_common/backtrace.rs:65:5
 3:     0x7f01d5969ba1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd8232dceaa5f842a
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/sys_common/backtrace.rs:44:22
 4:     0x7f01d59ca18f - core::fmt::rt::Argument::fmt::hbb868be86ad03968
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/core/src/fmt/rt.rs:138:9
 5:     0x7f01d59ca18f - core::fmt::write::ha174691b29cb8587
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/core/src/fmt/mod.rs:1094:21
 6:     0x7f01d595cdb1 - std::io::Write::write_fmt::h16c27c35c166af5d
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/io/mod.rs:1713:15
 7:     0x7f01d59699b5 - std::sys_common::backtrace::_print::ha2df7b232cdda68a
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/sys_common/backtrace.rs:47:5
 8:     0x7f01d59699b5 - std::sys_common::backtrace::print::h8c0a7734e29006f9
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/sys_common/backtrace.rs:34:9
 9:     0x7f01d596c677 - std::panicking::default_hook::{{closure}}::h8a35ce5756ca853f
10:     0x7f01d596c464 - std::panicking::default_hook::hac20b200f3148ff6
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/panicking.rs:288:9
11:     0x7f01d8b96d1b - rustc_driver_impl[99c4d2c9209ccfb0]::install_ice_hook::{closure#0}
12:     0x7f01d596cdbd - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haec4d3264083e3ef
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/alloc/src/boxed.rs:1999:9
13:     0x7f01d596cdbd - std::panicking::rust_panic_with_hook::h52fee6bdefb6b7d6
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/panicking.rs:709:13
14:     0x7f01d90a3271 - std[f32b9bd0414b81da]::panicking::begin_panic::<rustc_errors[b17e25cf5d480feb]::ExplicitBug>::{closure#0}
15:     0x7f01d909ee66 - std[f32b9bd0414b81da]::sys_common::backtrace::__rust_end_short_backtrace::<std[f32b9bd0414b81da]::panicking::begin_panic<rustc_errors[b17e25cf5d480feb]::ExplicitBug>::{closure#0}, !>
16:     0x7f01d9119b36 - std[f32b9bd0414b81da]::panicking::begin_panic::<rustc_errors[b17e25cf5d480feb]::ExplicitBug>
17:     0x7f01d9098e74 - <rustc_errors[b17e25cf5d480feb]::HandlerInner>::bug::<alloc[e11b4757b3592511]::string::String>
18:     0x7f01d9098c16 - <rustc_errors[b17e25cf5d480feb]::Handler>::bug::<alloc[e11b4757b3592511]::string::String>
19:     0x7f01d91277c5 - rustc_middle[622728272c2e3e3b]::util::bug::opt_span_bug_fmt::<rustc_span[9735a68f1ff93904]::span_encoding::Span>::{closure#0}
20:     0x7f01d91243ea - rustc_middle[622728272c2e3e3b]::ty::context::tls::with_opt::<rustc_middle[622728272c2e3e3b]::util::bug::opt_span_bug_fmt<rustc_span[9735a68f1ff93904]::span_encoding::Span>::{closure#0}, !>::{closure#0}
21:     0x7f01d91243ba - rustc_middle[622728272c2e3e3b]::ty::context::tls::with_context_opt::<rustc_middle[622728272c2e3e3b]::ty::context::tls::with_opt<rustc_middle[622728272c2e3e3b]::util::bug::opt_span_bug_fmt<rustc_span[9735a68f1ff93904]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
22:     0x7f01d6e664fd - rustc_middle[622728272c2e3e3b]::util::bug::bug_fmt
23:     0x7f01d7f9532d - rustc_hir_analysis[edf2ec8e9f871517]::collect::type_of::type_of
24:     0x7f01d6d15114 - rustc_query_impl[d998e27c23e50912]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d998e27c23e50912]::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[622728272c2e3e3b]::query::erase::Erased<[u8; 8usize]>>
25:     0x7f01d6d14e70 - <rustc_query_impl[d998e27c23e50912]::query_impl::type_of::dynamic_query::{closure#2} as core[87699bbb0bcd8c66]::ops::function::FnOnce<(rustc_middle[622728272c2e3e3b]::ty::context::TyCtxt, rustc_span[9735a68f1ff93904]::def_id::DefId)>>::call_once
26:     0x7f01d6c1ffd5 - rustc_query_system[1ec15744c4bd462a]::query::plumbing::try_execute_query::<rustc_query_impl[d998e27c23e50912]::DynamicConfig<rustc_query_system[1ec15744c4bd462a]::query::caches::DefaultCache<rustc_span[9735a68f1ff93904]::def_id::DefId, rustc_middle[622728272c2e3e3b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[d998e27c23e50912]::plumbing::QueryCtxt, false>
27:     0x7f01d851ea93 - rustc_query_impl[d998e27c23e50912]::query_impl::type_of::get_query_non_incr::__rust_end_short_backtrace
28:     0x55728eb91fd8 - rustc_middle[622728272c2e3e3b]::query::plumbing::query_get_at::<rustc_query_system[1ec15744c4bd462a]::query::caches::DefaultCache<rustc_span[9735a68f1ff93904]::def_id::DefId, rustc_middle[622728272c2e3e3b]::query::erase::Erased<[u8; 8usize]>>>
29:     0x55728eba887c - <clippy_lints[9dd90d7001ce2b12]::missing_fields_in_debug::MissingFieldsInDebug as rustc_lint[53b2d595f425fb45]::passes::LateLintPass>::check_item
30:     0x7f01d8f4c863 - <rustc_lint[53b2d595f425fb45]::early::RuntimeCombinedEarlyLintPass as rustc_lint[53b2d595f425fb45]::passes::EarlyLintPass>::check_local
31:     0x7f01d8f3d007 - <rustc_lint[53b2d595f425fb45]::late::LateContextAndPass<rustc_lint[53b2d595f425fb45]::late::RuntimeCombinedLateLintPass> as rustc_hir[efa68a57dfc3b978]::intravisit::Visitor>::visit_nested_item
32:     0x7f01d8f14418 - rustc_hir[efa68a57dfc3b978]::intravisit::walk_mod::<rustc_lint[53b2d595f425fb45]::late::LateContextAndPass<rustc_lint[53b2d595f425fb45]::late::RuntimeCombinedLateLintPass>>
33:     0x7f01d8f3d012 - <rustc_lint[53b2d595f425fb45]::late::LateContextAndPass<rustc_lint[53b2d595f425fb45]::late::RuntimeCombinedLateLintPass> as rustc_hir[efa68a57dfc3b978]::intravisit::Visitor>::visit_nested_item
34:     0x7f01d8f14418 - rustc_hir[efa68a57dfc3b978]::intravisit::walk_mod::<rustc_lint[53b2d595f425fb45]::late::LateContextAndPass<rustc_lint[53b2d595f425fb45]::late::RuntimeCombinedLateLintPass>>
35:     0x7f01d821b61e - rustc_lint[53b2d595f425fb45]::late::late_lint_crate::<rustc_lint[53b2d595f425fb45]::BuiltinCombinedLateLintPass>
36:     0x7f01d821aa98 - <rustc_session[6a995500b9a8686d]::session::Session>::time::<(), rustc_lint[53b2d595f425fb45]::late::check_crate<rustc_lint[53b2d595f425fb45]::BuiltinCombinedLateLintPass, rustc_interface[91e8f532f23dd0fa]::passes::analysis::{closure#5}::{closure#1}::{closure#2}::{closure#0}::{closure#0}>::{closure#0}::{closure#0}>
37:     0x7f01d802f923 - <rustc_session[6a995500b9a8686d]::session::Session>::time::<(), rustc_interface[91e8f532f23dd0fa]::passes::analysis::{closure#5}::{closure#1}::{closure#2}::{closure#0}>
38:     0x7f01d802f49e - <core[87699bbb0bcd8c66]::panic::unwind_safe::AssertUnwindSafe<rustc_interface[91e8f532f23dd0fa]::passes::analysis::{closure#5}::{closure#1}> as core[87699bbb0bcd8c66]::ops::function::FnOnce<()>>::call_once
39:     0x7f01d802ef98 - <rustc_session[6a995500b9a8686d]::session::Session>::time::<(), rustc_interface[91e8f532f23dd0fa]::passes::analysis::{closure#5}>
40:     0x7f01d802e70d - rustc_interface[91e8f532f23dd0fa]::passes::analysis
41:     0x7f01d80926da - rustc_query_impl[d998e27c23e50912]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d998e27c23e50912]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[622728272c2e3e3b]::query::erase::Erased<[u8; 1usize]>>
42:     0x7f01d80926c9 - <rustc_query_impl[d998e27c23e50912]::query_impl::analysis::dynamic_query::{closure#2} as core[87699bbb0bcd8c66]::ops::function::FnOnce<(rustc_middle[622728272c2e3e3b]::ty::context::TyCtxt, ())>>::call_once
43:     0x7f01d824a428 - rustc_query_system[1ec15744c4bd462a]::query::plumbing::try_execute_query::<rustc_query_impl[d998e27c23e50912]::DynamicConfig<rustc_query_system[1ec15744c4bd462a]::query::caches::SingleCache<rustc_middle[622728272c2e3e3b]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[d998e27c23e50912]::plumbing::QueryCtxt, false>
44:     0x7f01d824a1f9 - rustc_query_impl[d998e27c23e50912]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
45:     0x7f01d821ebc5 - <rustc_middle[622728272c2e3e3b]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[99c4d2c9209ccfb0]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>
46:     0x7f01d7dd5630 - <rustc_interface[91e8f532f23dd0fa]::interface::Compiler>::enter::<rustc_driver_impl[99c4d2c9209ccfb0]::run_compiler::{closure#1}::{closure#2}, core[87699bbb0bcd8c66]::result::Result<core[87699bbb0bcd8c66]::option::Option<rustc_interface[91e8f532f23dd0fa]::queries::Linker>, rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>
47:     0x7f01d7dd2c40 - std[f32b9bd0414b81da]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[91e8f532f23dd0fa]::util::run_in_thread_pool_with_globals<rustc_interface[91e8f532f23dd0fa]::interface::run_compiler<core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>, rustc_driver_impl[99c4d2c9209ccfb0]::run_compiler::{closure#1}>::{closure#0}, core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>
48:     0x7f01d7dd23e5 - <<std[f32b9bd0414b81da]::thread::Builder>::spawn_unchecked_<rustc_interface[91e8f532f23dd0fa]::util::run_in_thread_pool_with_globals<rustc_interface[91e8f532f23dd0fa]::interface::run_compiler<core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>, rustc_driver_impl[99c4d2c9209ccfb0]::run_compiler::{closure#1}>::{closure#0}, core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[87699bbb0bcd8c66]::result::Result<(), rustc_span[9735a68f1ff93904]::ErrorGuaranteed>>::{closure#1} as core[87699bbb0bcd8c66]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
49:     0x7f01d59772b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h11bdbf737e1deec8
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/alloc/src/boxed.rs:1985:9
50:     0x7f01d59772b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hcf010e79019e090c
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/alloc/src/boxed.rs:1985:9
51:     0x7f01d59772b5 - std::sys::unix::thread::Thread::new::thread_start::h2506d9823e010db7
                             at /rustc/9eee230cd0a56bfba3ce65121798d9f9f4341cdd/library/std/src/sys/unix/thread.rs:108:17
52:     0x7f01d560abb5 - <unknown>
53:     0x7f01d568cd90 - <unknown>
54:                0x0 - <unknown>

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

note: rustc 1.72.0-nightly (9eee230cd 2023-06-04) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C codegen-units=16 -C debuginfo=2 -C overflow-checks=on -Z unstable-options -C target-cpu=native -C symbol-mangling-version=legacy -Z unstable-options -Z unstable-options -Z force-unstable-if-unmarked -Z macro-backtrace -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -C split-debuginfo=off -C prefer-dynamic -Z inline-mir -C lto=off -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/") -Z binary-dep-depinfo

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [type_of] computing type of `ptr::<impl at library/core/src/ptr/mod.rs:1936:1: 1936:32>::F`
#1 [analysis] running analysis passes on this crate
end of query stack
note: Clippy version: clippy 0.1.72 (9eee230 2023-06-04)

error: could not compile `core` (lib)
Build completed unsuccessfully in 0:00:08

[blyxyas]

Could you give more details? What's the command you used to build rustc with Clippy?

[matthiaskrgr]

You can check out the nightly commit on the rustc repo to make sure there are no incompatibilities

rustc --version --verbose
=>

rustc 1.72.0-nightly (398fa2187 2023-06-03)
binary: rustc
commit-hash: 398fa2187c88de46c13c142f600064483a563c86     //// <=== use this
commit-date: 2023-06-03
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.4

in the rustc repo: git checkout 398fa2187c88de46c13c142f600064483a563c86

then x.py clippy which should reproduce the ICE

[y21]

oops, this probably happens because of this blanket impl inside of core itself: https://doc.rust-lang.org/stable/std/fmt/trait.Debug.html#impl-Debug-for-F

the lint calls tcx.type_of() with the generic param F, and that ICEs here: https://github.com/rust-lang/rust/blob/e6d4725c76f3b526c74454bc51afdf6daf133506/compiler/rustc_hir_analysis/src/collect/type_of.rs#L489-L493

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