ICE: late diagnostics: no entry found for key

[matthiaskrgr]

auto-reduced (treereduce-rust):

struct F;



mod trait_impl_assoc_fn_to_other {
    impl Trait for S {
         { &self.0 };
    }
}

mod trait_assoc_fn_to_other {
    trait Trait2 : Trait {
        reuse <F as Trait>::foo1 { self }
        reuse <F as Trait>::async {
        (async || {}).await;
    };
    }
}

original:

struct F;

mod inherent_impl_assoc_fn_to_other {
    impl S {
        reuse  { &self.0 }:
    }
}

mod trait_impl_assoc_fn_to_other {
    impl Trait for S {
         { &self.0 };
    }
}

mod trait_assoc_fn_to_other {
    trait Trait2 : Trait {
        reuse <F as Trait>::foo1 { self }
        reuse <F as Trait>::async {
        (async || {}).await;
    };
    }
}

Version information

rustc 1.79.0-nightly (5557f8c9d 2024-04-24)
binary: rustc
commit-hash: 5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea
commit-date: 2024-04-24
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.4

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error: non-item in item list
 --> /tmp/icemaker_global_tempdir.M3N7dC1mVrpT/rustc_testrunner_tmpdir_reporting.vKvtjneSE3Fp/mvce.rs:7:10
  |
6 |     impl Trait for S {
  |                      - item list starts here
7 |          { &self.0 };
  |          ^ non-item starts here
8 |     }
  |     - item list ends here

error: non-item in item list
  --> /tmp/icemaker_global_tempdir.M3N7dC1mVrpT/rustc_testrunner_tmpdir_reporting.vKvtjneSE3Fp/mvce.rs:16:6
   |
12 |     trait Trait2 : Trait {
   |                          - item list starts here
...
16 |     };
   |      ^
   |      |
   |      non-item starts here
   |      help: consider removing this semicolon
17 |     }
   |     - item list ends here

thread 'rustc' panicked at compiler/rustc_resolve/src/late/diagnostics.rs:2042:57:
no entry found for key
stack backtrace:
   0:     0x753ac50d9145 - std::backtrace_rs::backtrace::libunwind::trace::h0ff13331e72566cc
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x753ac50d9145 - std::backtrace_rs::backtrace::trace_unsynchronized::h9d4b1bd64e902543
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x753ac50d9145 - std::sys_common::backtrace::_print_fmt::h081005de9057cbf5
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x753ac50d9145 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h15fc700db6edae7e
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x753ac512821b - core::fmt::rt::Argument::fmt::h59f9e72725aff3b8
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/core/src/fmt/rt.rs:165:63
   5:     0x753ac512821b - core::fmt::write::h76f096ae855823be
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/core/src/fmt/mod.rs:1157:21
   6:     0x753ac50cdccf - std::io::Write::write_fmt::h7abe2202f1b29460
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/io/mod.rs:1832:15
   7:     0x753ac50d8f1e - std::sys_common::backtrace::_print::hdf7c2b7f623e9652
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x753ac50d8f1e - std::sys_common::backtrace::print::h75f08b3d9123bba1
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x753ac50db889 - std::panicking::default_hook::{{closure}}::hb3b1ba32e53d5e85
  10:     0x753ac50db5cd - std::panicking::default_hook::h99e57d8f75c65ecf
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/panicking.rs:298:9
  11:     0x753ac1a41a0c - std[1f3cc3a786ce7ca9]::panicking::update_hook::<alloc[dbe0d48a65192cd7]::boxed::Box<rustc_driver_impl[529b3142d24d9c0c]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x753ac50dbf86 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcfaaf51e4544653c
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/alloc/src/boxed.rs:2036:9
  13:     0x753ac50dbf86 - std::panicking::rust_panic_with_hook::h9c2cbfe157b51a67
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/panicking.rs:799:13
  14:     0x753ac50dbd34 - std::panicking::begin_panic_handler::{{closure}}::h2dbcfcd80b7dc0c4
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/panicking.rs:664:13
  15:     0x753ac50d9609 - std::sys_common::backtrace::__rust_end_short_backtrace::h75ccad1bb6b02b8a
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x753ac50dba67 - rust_begin_unwind
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/panicking.rs:652:5
  17:     0x753ac51246e3 - core::panicking::panic_fmt::hb7ed84b40520c8eb
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/core/src/panicking.rs:72:14
  18:     0x753ac512489c - core::panicking::panic_display::ha1bfdebbc7cfd192
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/core/src/panicking.rs:263:5
  19:     0x753ac512448c - core::option::expect_failed::hdd1a71408332732c
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/core/src/option.rs:1994:5
  20:     0x753ac235652d - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::try_lookup_name_relaxed
  21:     0x753ac23482bb - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::smart_resolve_report_errors
  22:     0x753abffb1877 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::smart_resolve_path_fragment::{closure#0}
  23:     0x753ac382dafa - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::smart_resolve_path_fragment
  24:     0x753ac3833c19 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::resolve_expr
  25:     0x753ac3832a29 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::resolve_expr
  26:     0x753ac3830f9e - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::resolve_block
  27:     0x753ac23636d4 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>::resolve_delegation
  28:     0x753ac381af06 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor as rustc_ast[40ef0baa130c0d37]::visit::Visitor>::visit_item
  29:     0x753ac380ca09 - rustc_ast[40ef0baa130c0d37]::visit::walk_item::<rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor>
  30:     0x753ac3814738 - <rustc_resolve[139fe3533e37bc7b]::late::LateResolutionVisitor as rustc_ast[40ef0baa130c0d37]::visit::Visitor>::visit_item
  31:     0x753ac3e47581 - <rustc_resolve[139fe3533e37bc7b]::Resolver>::resolve_crate::{closure#0}
  32:     0x753ac3e42c9c - <rustc_resolve[139fe3533e37bc7b]::Resolver>::resolve_crate
  33:     0x753ac33f9c6b - rustc_interface[ab711e91de8811a0]::passes::resolver_for_lowering_raw
  34:     0x753ac33f8e9d - rustc_query_impl[3ee10135cbcad228]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[3ee10135cbcad228]::query_impl::resolver_for_lowering_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a285f3437f39b2c2]::query::erase::Erased<[u8; 16usize]>>
  35:     0x753ac33f8e8b - <rustc_query_impl[3ee10135cbcad228]::query_impl::resolver_for_lowering_raw::dynamic_query::{closure#2} as core[266bc4e95965f381]::ops::function::FnOnce<(rustc_middle[a285f3437f39b2c2]::ty::context::TyCtxt, ())>>::call_once
  36:     0x753ac3be3085 - rustc_query_system[f66be17258afb63b]::query::plumbing::try_execute_query::<rustc_query_impl[3ee10135cbcad228]::DynamicConfig<rustc_query_system[f66be17258afb63b]::query::caches::SingleCache<rustc_middle[a285f3437f39b2c2]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[3ee10135cbcad228]::plumbing::QueryCtxt, false>
  37:     0x753ac3be2c01 - rustc_query_impl[3ee10135cbcad228]::query_impl::resolver_for_lowering_raw::get_query_non_incr::__rust_end_short_backtrace
  38:     0x753ac3a32381 - rustc_interface[ab711e91de8811a0]::interface::run_compiler::<core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>, rustc_driver_impl[529b3142d24d9c0c]::run_compiler::{closure#0}>::{closure#1}
  39:     0x753ac3a1c349 - std[1f3cc3a786ce7ca9]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[ab711e91de8811a0]::util::run_in_thread_with_globals<rustc_interface[ab711e91de8811a0]::util::run_in_thread_pool_with_globals<rustc_interface[ab711e91de8811a0]::interface::run_compiler<core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>, rustc_driver_impl[529b3142d24d9c0c]::run_compiler::{closure#0}>::{closure#1}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>::{closure#0}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>
  40:     0x753ac3a1c0fa - <<std[1f3cc3a786ce7ca9]::thread::Builder>::spawn_unchecked_<rustc_interface[ab711e91de8811a0]::util::run_in_thread_with_globals<rustc_interface[ab711e91de8811a0]::util::run_in_thread_pool_with_globals<rustc_interface[ab711e91de8811a0]::interface::run_compiler<core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>, rustc_driver_impl[529b3142d24d9c0c]::run_compiler::{closure#0}>::{closure#1}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>::{closure#0}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[266bc4e95965f381]::result::Result<(), rustc_span[b06c962b547b236f]::ErrorGuaranteed>>::{closure#2} as core[266bc4e95965f381]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x753ac50e5e1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf8633d479a73f3aa
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/alloc/src/boxed.rs:2022:9
  42:     0x753ac50e5e1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hde56e39011a54bd8
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/alloc/src/boxed.rs:2022:9
  43:     0x753ac50e5e1b - std::sys::pal::unix::thread::Thread::new::thread_start::h03a9b1cf25d2ad5d
                               at /rustc/5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea/library/std/src/sys/pal/unix/thread.rs:108:17
  44:     0x753abe8a955a - <unknown>
  45:     0x753abe926a3c - <unknown>
  46:                0x0 - <unknown>

error: 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: please make sure that you have updated to the latest nightly

note: rustc 1.79.0-nightly (5557f8c9d 2024-04-24) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [resolver_for_lowering_raw] getting the resolver for lowering
end of query stack
error: aborting due to 2 previous errors

[matthiaskrgr]

this probably crashes since #122500 but I haven't verified that yet

[matthiaskrgr]

smaller

struct F;

trait Trait2 : Trait {
	reuse <F as Trait>::async {
		(async || {}).await;
	};
}

[matthiaskrgr]

even smaller

trait Trait2 : Trait {
	reuse <() as Trait>::async {
		(async || {}).await;
	};
}