ICE: no warnings or errors encountered even though delayed_good_path_bugs issued #![feature(lint_reasons)]

[xFrednet]

Code

// check-pass
#![feature(lint_reasons)]
#![allow(unused)]

#[expect(drop_bounds)]
fn trigger_rustc_lints<T: Drop>() {
}

fn main() {}

Meta

rustc --version --verbose:

rustc 1.61.0-nightly (9f4dc0b4d 2022-03-23)
binary: rustc
commit-hash: 9f4dc0b4db892271cd0dada6e072775b5b5d6b1e
commit-date: 2022-03-23
host: x86_64-unknown-linux-gnu
release: 1.61.0-nightly
LLVM version: 14.0.0

Error output

frednet@xfrednet:~/workspace/rust/lab$ cargo check
    Checking lab v0.1.0 (/home/xfrednet/workspace/rust/lab)
error: internal compiler error: no warnings or errors encountered even though `delayed_good_path_bugs` issued

error: internal compiler error: trimmed_def_paths constructed
  |
  = note: delayed at    0: <rustc_errors::Handler>::delay_good_path_bug
             1: rustc_middle::ty::print::pretty::trimmed_def_paths
             2: <rustc_middle::dep_graph::dep_node::DepKind as rustc_query_system::dep_graph::DepKind>::with_deps::<<rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task_impl<rustc_middle::ty::context::TyCtxt, (), std::collections::hash::map::HashMap<rustc_span::def_id::DefId, rustc_span::symbol::Symbol, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>>::{closure#0}, std::collections::hash::map::HashMap<rustc_span::def_id::DefId, rustc_span::symbol::Symbol, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>>
             3: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), std::collections::hash::map::HashMap<rustc_span::def_id::DefId, rustc_span::symbol::Symbol, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>>
          
note: 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 1.61.0-nightly (9f4dc0b4d 2022-03-23) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C incremental

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

query stack during panic:
end of query stack
error: could not compile `lab`
xfrednet@xfrednet:~/workspace/rust/lab$ 

Backtrace

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1291:13
stack backtrace:
   0:     0x7f8cd56d680d - std::backtrace_rs::backtrace::libunwind::trace::he1bc69317b314d2e
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f8cd56d680d - std::backtrace_rs::backtrace::trace_unsynchronized::h0be7bfa7bff7f915
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f8cd56d680d - std::sys_common::backtrace::_print_fmt::h3daff2ba590cbc63
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f8cd56d680d - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h82b295b0737f92f8
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f8cd573080c - core::fmt::write::hc116e04c8b781f0a
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/core/src/fmt/mod.rs:1190:17
   5:     0x7f8cd56c7e01 - std::io::Write::write_fmt::hdf2c5cf46a74c282
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/io/mod.rs:1655:15
   6:     0x7f8cd56d98f5 - std::sys_common::backtrace::_print::ha38935cfbe56cf33
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f8cd56d98f5 - std::sys_common::backtrace::print::h5a555af4c956e490
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f8cd56d98f5 - std::panicking::default_hook::{{closure}}::h7210e8b2ea136c6a
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/panicking.rs:295:22
   9:     0x7f8cd56d95a9 - std::panicking::default_hook::he0b6748cad6a9b81
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/panicking.rs:314:9
  10:     0x7f8cd5e752b1 - rustc_driver[15b9156f6b24bb3]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f8cd56da040 - std::panicking::rust_panic_with_hook::h7d90789c41819678
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/panicking.rs:702:17
  12:     0x7f8cd6f16c81 - std[7af56082c5a9adab]::panicking::begin_panic::<rustc_errors[afdb89a768619fcf]::ExplicitBug>::{closure#0}
  13:     0x7f8cd6f15cc6 - std[7af56082c5a9adab]::sys_common::backtrace::__rust_end_short_backtrace::<std[7af56082c5a9adab]::panicking::begin_panic<rustc_errors[afdb89a768619fcf]::ExplicitBug>::{closure#0}, !>
  14:     0x7f8cd6f1bd4f - std[7af56082c5a9adab]::panicking::begin_panic::<rustc_errors[afdb89a768619fcf]::ExplicitBug>
  15:     0x7f8cd6f28386 - std[7af56082c5a9adab]::panic::panic_any::<rustc_errors[afdb89a768619fcf]::ExplicitBug>
  16:     0x7f8cd85bae6c - <rustc_errors[afdb89a768619fcf]::HandlerInner as core[ec6d764e948e0586]::ops::drop::Drop>::drop
  17:     0x7f8cd7cf8c98 - core[ec6d764e948e0586]::ptr::drop_in_place::<rustc_session[6f79c38a04c315ff]::parse::ParseSess>
  18:     0x7f8cd7cfb41a - <alloc[c291d8ee38d8ad41]::rc::Rc<rustc_session[6f79c38a04c315ff]::session::Session> as core[ec6d764e948e0586]::ops::drop::Drop>::drop
  19:     0x7f8cd7ce417d - core[ec6d764e948e0586]::ptr::drop_in_place::<rustc_interface[f459bdc7c39711c]::interface::Compiler>
  20:     0x7f8cd7ce3734 - rustc_span[37126335ebbd5d87]::with_source_map::<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_interface[f459bdc7c39711c]::interface::create_compiler_and_run<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_driver[15b9156f6b24bb3]::run_compiler::{closure#1}>::{closure#1}>
  21:     0x7f8cd7cd1184 - rustc_interface[f459bdc7c39711c]::interface::create_compiler_and_run::<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_driver[15b9156f6b24bb3]::run_compiler::{closure#1}>
  22:     0x7f8cd7ccdf02 - <scoped_tls[838f77cdbb45d46c]::ScopedKey<rustc_span[37126335ebbd5d87]::SessionGlobals>>::set::<rustc_interface[f459bdc7c39711c]::interface::run_compiler<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_driver[15b9156f6b24bb3]::run_compiler::{closure#1}>::{closure#0}, core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>>
  23:     0x7f8cd7ccc25f - std[7af56082c5a9adab]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f459bdc7c39711c]::util::run_in_thread_pool_with_globals<rustc_interface[f459bdc7c39711c]::interface::run_compiler<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_driver[15b9156f6b24bb3]::run_compiler::{closure#1}>::{closure#0}, core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>>::{closure#0}, core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>>
  24:     0x7f8cd7ce44f2 - <<std[7af56082c5a9adab]::thread::Builder>::spawn_unchecked_<rustc_interface[f459bdc7c39711c]::util::run_in_thread_pool_with_globals<rustc_interface[f459bdc7c39711c]::interface::run_compiler<core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>, rustc_driver[15b9156f6b24bb3]::run_compiler::{closure#1}>::{closure#0}, core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>>::{closure#0}, core[ec6d764e948e0586]::result::Result<(), rustc_errors[afdb89a768619fcf]::ErrorGuaranteed>>::{closure#1} as core[ec6d764e948e0586]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  25:     0x7f8cd56e4233 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h547c45aa46469d29
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/alloc/src/boxed.rs:1861:9
  26:     0x7f8cd56e4233 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he0a17443e7e0f241
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/alloc/src/boxed.rs:1861:9
  27:     0x7f8cd56e4233 - std::sys::unix::thread::Thread::new::thread_start::hd0dd84768f409ab9
                               at /rustc/9f4dc0b4db892271cd0dada6e072775b5b5d6b1e/library/std/src/sys/unix/thread.rs:108:17
  28:     0x7f8cd5483947 - start_thread
                               at ./nptl/./nptl/pthread_create.c:435:8
  29:     0x7f8cd5513a44 - __GI___clone
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:100
  30:                0x0 - <unknown>

[xFrednet]

I'm responsible for this one 😅

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