error[E0425]: cannot find type `W` in this scope
--> /tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs:4:26
|
4 | impl<'T, const N: usize> W<N> {
| ^ not found in this scope
error[E0425]: cannot find type `W` in this scope
--> /tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs:5:23
|
5 | reuse Trait::<'T, W<N>, N>::r#static;
| ^ not found in this scope
error[E0658]: functions delegation is not yet fully implemented
--> /tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs:5:5
|
5 | reuse Trait::<'T, W<N>, N>::r#static;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #118212 <https://github.com/rust-lang/rust/issues/118212> for more information
= help: add `#![feature(fn_delegation)]` to the crate attributes to enable
= note: this compiler was built on 2026-07-01; consider upgrading it if it is out of date
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs:6:2
|
6 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs`
thread 'rustc' (1011618) panicked at /rustc-dev/4c9d2bfe4ad7a65669098754964aaebe0ec1ced2/compiler/rustc_middle/src/ty/sty.rs:367:9:
did not expect duplicate `ConstParamHasTy` for `N/#1` in param-env: ParamEnv {
caller_bounds: [
Binder { value: ConstArgHasType(N/#1, bool), bound_vars: [] },
Binder { value: TraitPredicate(<{type error} as std::marker::Sized>, polarity:Positive), bound_vars: [] },
Binder { value: TraitPredicate(<{type error} as std::marker::MetaSized>, polarity:Positive), bound_vars: [] },
Binder { value: ConstArgHasType(N/#1, usize), bound_vars: [] },
],
}
stack backtrace:
0: 0x7f9e1f0e6ac6 - <<std[16495cdcf3c2a980]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[e500fd9f2ab8424]::fmt::Display>::fmt
1: 0x7f9e1f80f288 - core[e500fd9f2ab8424]::fmt::write
2: 0x7f9e1f0fbeac - <std[16495cdcf3c2a980]::sys::stdio::unix::Stderr as std[16495cdcf3c2a980]::io::Write>::write_fmt
3: 0x7f9e1f0baf2a - std[16495cdcf3c2a980]::panicking::default_hook::{closure#0}
4: 0x7f9e1f0d9213 - std[16495cdcf3c2a980]::panicking::default_hook
5: 0x7f9e1e0c6108 - std[16495cdcf3c2a980]::panicking::update_hook::<alloc[99712308a9e7a3db]::boxed::Box<rustc_driver_impl[6fdcfad033932331]::install_ice_hook::{closure#1}>>::{closure#0}
6: 0x7f9e1f0d96b2 - std[16495cdcf3c2a980]::panicking::panic_with_hook
7: 0x7f9e1f0bafe2 - std[16495cdcf3c2a980]::panicking::panic_handler::{closure#0}
8: 0x7f9e1f0af4c9 - std[16495cdcf3c2a980]::sys::backtrace::__rust_end_short_backtrace::<std[16495cdcf3c2a980]::panicking::panic_handler::{closure#0}, !>
9: 0x7f9e1f0bc94d - __rustc[32109bd59933d253]::rust_begin_unwind
10: 0x7f9e1c07f7bc - core[e500fd9f2ab8424]::panicking::panic_fmt
11: 0x7f9e211a0ad2 - <rustc_middle[320e6cb0af7a3edc]::ty::sty::ParamConst>::find_const_ty_from_env.cold
12: 0x7f9e1fec465d - <rustc_trait_selection[82eb004aec24fc7d]::traits::fulfill::FulfillProcessor as rustc_data_structures[850f084c2feb1379]::obligation_forest::ObligationProcessor>::process_obligation
13: 0x7f9e1f805ad1 - <rustc_data_structures[850f084c2feb1379]::obligation_forest::ObligationForest<rustc_trait_selection[82eb004aec24fc7d]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[82eb004aec24fc7d]::traits::fulfill::FulfillProcessor>
14: 0x7f9e1fae6ea6 - <rustc_hir_typeck[e15413bd17dde5e5]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
15: 0x7f9e1fb044eb - <rustc_hir_typeck[e15413bd17dde5e5]::fn_ctxt::FnCtxt>::check_expr_call
16: 0x7f9e1fae6913 - <rustc_hir_typeck[e15413bd17dde5e5]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
17: 0x7f9e1fabc7e3 - <rustc_hir_typeck[e15413bd17dde5e5]::fn_ctxt::FnCtxt>::check_expr_block
18: 0x7f9e1fae68ed - <rustc_hir_typeck[e15413bd17dde5e5]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
19: 0x7f9e1faa420f - rustc_hir_typeck[e15413bd17dde5e5]::check::check_fn
20: 0x7f9e2067d277 - rustc_hir_typeck[e15413bd17dde5e5]::typeck_with_inspect::{closure#0}
21: 0x7f9e2067bc70 - rustc_query_impl[e8ce24fe214a5db4]::query_impl::typeck_root::invoke_provider_fn::__rust_begin_short_backtrace
22: 0x7f9e1ff86129 - rustc_query_impl[e8ce24fe214a5db4]::execution::try_execute_query::<rustc_data_structures[850f084c2feb1379]::vec_cache::VecCache<rustc_span[d4ad0aa40b44abc2]::def_id::LocalDefId, rustc_middle[320e6cb0af7a3edc]::query::erase::ErasedData<[u8; 8usize]>, rustc_middle[320e6cb0af7a3edc]::dep_graph::graph::DepNodeIndex>, false>
23: 0x7f9e1ff85b83 - rustc_query_impl[e8ce24fe214a5db4]::query_impl::typeck_root::execute_query_non_incr::__rust_end_short_backtrace
24: 0x7f9e1fe35e6d - <rustc_middle[320e6cb0af7a3edc]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_hir_analysis[81978af84cf663ed]::check_crate::{closure#1}>::{closure#0}
25: 0x7f9e1fe357ab - rustc_hir_analysis[81978af84cf663ed]::check_crate
26: 0x7f9e1ff86e3a - rustc_interface[8b4b822bfe1350c5]::passes::analysis
27: 0x7f9e209828c7 - rustc_query_impl[e8ce24fe214a5db4]::execution::try_execute_query::<rustc_middle[320e6cb0af7a3edc]::query::caches::SingleCache<rustc_middle[320e6cb0af7a3edc]::query::erase::ErasedData<[u8; 0usize]>>, false>
28: 0x7f9e20982529 - rustc_query_impl[e8ce24fe214a5db4]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace
29: 0x7f9e209b8bc0 - rustc_interface[8b4b822bfe1350c5]::interface::run_compiler::<(), rustc_driver_impl[6fdcfad033932331]::run_compiler::{closure#0}>::{closure#1}
30: 0x7f9e209915ba - std[16495cdcf3c2a980]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[8b4b822bfe1350c5]::util::run_in_thread_with_globals<rustc_interface[8b4b822bfe1350c5]::util::run_in_thread_pool_with_globals<rustc_interface[8b4b822bfe1350c5]::interface::run_compiler<(), rustc_driver_impl[6fdcfad033932331]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
31: 0x7f9e2099136d - <std[16495cdcf3c2a980]::thread::lifecycle::spawn_unchecked<rustc_interface[8b4b822bfe1350c5]::util::run_in_thread_with_globals<rustc_interface[8b4b822bfe1350c5]::util::run_in_thread_pool_with_globals<rustc_interface[8b4b822bfe1350c5]::interface::run_compiler<(), rustc_driver_impl[6fdcfad033932331]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[e500fd9f2ab8424]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
32: 0x7f9e20995790 - <std[16495cdcf3c2a980]::sys::thread::unix::Thread>::new::thread_start
33: 0x7f9e1a2981b9 - <unknown>
34: 0x7f9e1a31d21c - <unknown>
35: 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 1.98.0-nightly (4c9d2bfe4 2026-07-01) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [typeck_root] type-checking `<impl at /tmp/icemaker_global_tempdir.zm1FldSVy35z/rustc_testrunner_tmpdir_reporting.BimMTowxrpho/mvce.rs:4:1: 4:30>::r#static`
#1 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0425, E0601, E0658.
For more information about an error, try `rustc --explain E0425`.
auto-reduced (treereduce-rust):
original:
Version information
Possibly related line of code:
rust/compiler/rustc_middle/src/ty/sty.rs
Lines 361 to 373 in 4c9d2bf
Command:
/home/matthias/.rustup/toolchains/master/bin/rustcProgram output
@rustbot label +F-fn_delegation