[ICE]: delegation: No HirId for DefId #154332
Description
auto-reduced (treereduce-rust):
fn a() {}
reuse a as b {
let closure = || {
fn foo<'a, 'b, T: Clone, const N: usize, U: Clone>(, ) {}
reuse foo::<String, 1, String> as bar;
};
closure();
}
original:
#![feature(fn_delegation)]
#![allow(incomplete_features)]
fn a() {}
reuse a as b {
let closure = || {
fn foo<'a, 'b, T: Clone, const N: usize, U: Clone>(_t: &'a T, _u: &'b U) {}
reuse foo::<String, 1, String> as bar;
bar(&"".to_string(), &"".to_string());
};
closure();
} //~ ERROR an inner attribute is not permitted in this context
fn main() {}Version information
rustc 1.96.0-nightly (0312931d8 2026-03-24)
binary: rustc
commit-hash: 0312931d8c0ba1a28268a12c06202b68cbc65f76
commit-date: 2026-03-24
host: x86_64-unknown-linux-gnu
release: 1.96.0-nightly
LLVM version: 22.1.0
Possibly related line of code:
rust/compiler/rustc_middle/src/hir/mod.rs
Lines 472 to 484 in 0312931
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
error: expected parameter name, found `,`
--> /tmp/icemaker_global_tempdir.TJGRzDGRPjbZ/rustc_testrunner_tmpdir_reporting.fWMLkXu4AjP3/mvce.rs:8:64
|
8 | fn foo<'a, 'b, T: Clone, const N: usize, U: Clone>(, ) {}
| ^ expected parameter name
error[E0658]: functions delegation is not yet fully implemented
--> /tmp/icemaker_global_tempdir.TJGRzDGRPjbZ/rustc_testrunner_tmpdir_reporting.fWMLkXu4AjP3/mvce.rs:10:13
|
10 | reuse foo::<String, 1, String> as bar;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= 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= note: this compiler was built on 2026-03-24; consider upgrading it if it is out of date
error[E0658]: functions delegation is not yet fully implemented
--> /tmp/icemaker_global_tempdir.TJGRzDGRPjbZ/rustc_testrunner_tmpdir_reporting.fWMLkXu4AjP3/mvce.rs:6:1
|
6 | / reuse a as b {
7 | | let closure = || {
8 | | fn foo<'a, 'b, T: Clone, const N: usize, U: Clone>(, ) {}
... |
14 | | closure();
15 | | }
| |_____^
|
= 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= note: this compiler was built on 2026-03-24; consider upgrading it if it is out of date
error: internal compiler error: /rustc-dev/0312931d8c0ba1a28268a12c06202b68cbc65f76/compiler/rustc_middle/src/hir/mod.rs:478:32: No HirId for DefId(0:5 ~ mvce[c8c2]::b::{closure#0})
thread 'rustc' (3048008) panicked at /rustc-dev/0312931d8c0ba1a28268a12c06202b68cbc65f76/compiler/rustc_middle/src/hir/mod.rs:478:32:
Box<dyn Any>
stack backtrace:
0: 0x7f10db980ccb - <<std[7ac4a4f233f64e32]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[9fdad5ee2fa795]::fmt::Display>::fmt
1: 0x7f10dc02f608 - core[9fdad5ee2fa795]::fmt::write
2: 0x7f10db997cd6 - <std[7ac4a4f233f64e32]::sys::stdio::unix::Stderr as std[7ac4a4f233f64e32]::io::Write>::write_fmt
3: 0x7f10db956cd8 - std[7ac4a4f233f64e32]::panicking::default_hook::{closure#0}
4: 0x7f10db9740d3 - std[7ac4a4f233f64e32]::panicking::default_hook
5: 0x7f10da97cfec - std[7ac4a4f233f64e32]::panicking::update_hook::<alloc[7be27c54429f639d]::boxed::Box<rustc_driver_impl[3e109776558d5f8]::install_ice_hook::{closure#1}>>::{closure#0}
6: 0x7f10db9743b2 - std[7ac4a4f233f64e32]::panicking::panic_with_hook
7: 0x7f10da9acd01 - std[7ac4a4f233f64e32]::panicking::begin_panic::<rustc_errors[ad69bad4fcee133e]::ExplicitBug>::{closure#0}
8: 0x7f10da9a5876 - std[7ac4a4f233f64e32]::sys::backtrace::__rust_end_short_backtrace::<std[7ac4a4f233f64e32]::panicking::begin_panic<rustc_errors[ad69bad4fcee133e]::ExplicitBug>::{closure#0}, !>
9: 0x7f10da9a574b - std[7ac4a4f233f64e32]::panicking::begin_panic::<rustc_errors[ad69bad4fcee133e]::ExplicitBug>
10: 0x7f10da9b8341 - <rustc_errors[ad69bad4fcee133e]::diagnostic::BugAbort as rustc_errors[ad69bad4fcee133e]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
11: 0x7f10daf963c9 - rustc_middle[63ac57b1bbd193ad]::util::bug::opt_span_bug_fmt::<rustc_span[89e9e13b33feef16]::span_encoding::Span>::{closure#0}
12: 0x7f10daf96552 - rustc_middle[63ac57b1bbd193ad]::ty::context::tls::with_opt::<rustc_middle[63ac57b1bbd193ad]::util::bug::opt_span_bug_fmt<rustc_span[89e9e13b33feef16]::span_encoding::Span>::{closure#0}, !>::{closure#0}
13: 0x7f10daf8701b - rustc_middle[63ac57b1bbd193ad]::ty::context::tls::with_context_opt::<rustc_middle[63ac57b1bbd193ad]::ty::context::tls::with_opt<rustc_middle[63ac57b1bbd193ad]::util::bug::opt_span_bug_fmt<rustc_span[89e9e13b33feef16]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
14: 0x7f10d875ef34 - rustc_middle[63ac57b1bbd193ad]::util::bug::bug_fmt
15: 0x7f10dc12da13 - rustc_query_impl[1a62e37e1d040ce]::query_impl::local_def_id_to_hir_id::invoke_provider_fn::__rust_begin_short_backtrace
16: 0x7f10dc12cd26 - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_data_structures[7cb43e1d7eabe054]::vec_cache::VecCache<rustc_span[89e9e13b33feef16]::def_id::LocalDefId, rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 8usize]>, rustc_middle[63ac57b1bbd193ad]::dep_graph::graph::DepNodeIndex>, false>
17: 0x7f10dc12ca85 - rustc_query_impl[1a62e37e1d040ce]::query_impl::local_def_id_to_hir_id::execute_query_non_incr::__rust_end_short_backtrace
18: 0x7f10dc1899ff - <rustc_span[89e9e13b33feef16]::def_id::LocalDefId as rustc_hir[ec9fa394ae8173e]::attrs::HasAttrs<rustc_middle[63ac57b1bbd193ad]::ty::context::TyCtxt>>::get_attrs
19: 0x7f10dc188ffb - rustc_query_impl[1a62e37e1d040ce]::query_impl::sanitizer_settings_for::invoke_provider_fn::__rust_begin_short_backtrace
20: 0x7f10dc18843b - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_data_structures[7cb43e1d7eabe054]::vec_cache::VecCache<rustc_span[89e9e13b33feef16]::def_id::LocalDefId, rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 4usize]>, rustc_middle[63ac57b1bbd193ad]::dep_graph::graph::DepNodeIndex>, false>
21: 0x7f10dc1881bb - rustc_query_impl[1a62e37e1d040ce]::query_impl::sanitizer_settings_for::execute_query_non_incr::__rust_end_short_backtrace
22: 0x7f10dc18906f - rustc_query_impl[1a62e37e1d040ce]::query_impl::sanitizer_settings_for::invoke_provider_fn::__rust_begin_short_backtrace
23: 0x7f10dc18843b - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_data_structures[7cb43e1d7eabe054]::vec_cache::VecCache<rustc_span[89e9e13b33feef16]::def_id::LocalDefId, rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 4usize]>, rustc_middle[63ac57b1bbd193ad]::dep_graph::graph::DepNodeIndex>, false>
24: 0x7f10dc1881bb - rustc_query_impl[1a62e37e1d040ce]::query_impl::sanitizer_settings_for::execute_query_non_incr::__rust_end_short_backtrace
25: 0x7f10dc17d731 - rustc_codegen_ssa[f4069af90124920b]::codegen_attrs::codegen_fn_attrs
26: 0x7f10dc17be72 - rustc_query_impl[1a62e37e1d040ce]::query_impl::codegen_fn_attrs::invoke_provider_fn::__rust_begin_short_backtrace
27: 0x7f10dc04fc4a - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_middle[63ac57b1bbd193ad]::query::caches::DefIdCache<rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 8usize]>>, false>
28: 0x7f10dc04f4d0 - rustc_query_impl[1a62e37e1d040ce]::query_impl::codegen_fn_attrs::execute_query_non_incr::__rust_end_short_backtrace
29: 0x7f10da421bbc - <rustc_ast_lowering[76ab009d4d83260]::LoweringContext<rustc_ast_lowering[76ab009d4d83260]::ResolverDelayedAstLowering>>::lower_delegation
30: 0x7f10da43b162 - <rustc_ast_lowering[76ab009d4d83260]::LoweringContext<rustc_ast_lowering[76ab009d4d83260]::ResolverDelayedAstLowering>>::lower_item_kind
31: 0x7f10da46a669 - <rustc_ast_lowering[76ab009d4d83260]::item::ItemLowerer<rustc_ast_lowering[76ab009d4d83260]::ResolverDelayedAstLowering>>::lower_node
32: 0x7f10da41d57b - rustc_ast_lowering[76ab009d4d83260]::lower_delayed_owner
33: 0x7f10dc12bc27 - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_data_structures[7cb43e1d7eabe054]::vec_cache::VecCache<rustc_span[89e9e13b33feef16]::def_id::LocalDefId, rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 0usize]>, rustc_middle[63ac57b1bbd193ad]::dep_graph::graph::DepNodeIndex>, false>
34: 0x7f10db424dab - rustc_query_impl[1a62e37e1d040ce]::query_impl::lower_delayed_owner::execute_query_non_incr::__rust_end_short_backtrace
35: 0x7f10dd3674a5 - rustc_middle[63ac57b1bbd193ad]::hir::map::hir_crate_items
36: 0x7f10dd1fdd35 - rustc_query_impl[1a62e37e1d040ce]::query_impl::hir_crate_items::invoke_provider_fn::__rust_begin_short_backtrace
37: 0x7f10dd1f8f20 - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_middle[63ac57b1bbd193ad]::query::caches::SingleCache<rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 8usize]>>, false>
38: 0x7f10dd1fa257 - rustc_query_impl[1a62e37e1d040ce]::query_impl::hir_crate_items::execute_query_non_incr::__rust_end_short_backtrace
39: 0x7f10dc129418 - rustc_interface[96c6593d249ce29a]::passes::analysis
40: 0x7f10dd1f9b49 - rustc_query_impl[1a62e37e1d040ce]::execution::try_execute_query::<rustc_middle[63ac57b1bbd193ad]::query::caches::SingleCache<rustc_middle[63ac57b1bbd193ad]::query::erase::ErasedData<[u8; 0usize]>>, false>
41: 0x7f10dd1f98a9 - rustc_query_impl[1a62e37e1d040ce]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace
42: 0x7f10dd21fad4 - rustc_interface[96c6593d249ce29a]::interface::run_compiler::<(), rustc_driver_impl[3e109776558d5f8]::run_compiler::{closure#0}>::{closure#1}
43: 0x7f10dd1e60fe - std[7ac4a4f233f64e32]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[96c6593d249ce29a]::util::run_in_thread_with_globals<rustc_interface[96c6593d249ce29a]::util::run_in_thread_pool_with_globals<rustc_interface[96c6593d249ce29a]::interface::run_compiler<(), rustc_driver_impl[3e109776558d5f8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
44: 0x7f10dd1e69a0 - <std[7ac4a4f233f64e32]::thread::lifecycle::spawn_unchecked<rustc_interface[96c6593d249ce29a]::util::run_in_thread_with_globals<rustc_interface[96c6593d249ce29a]::util::run_in_thread_pool_with_globals<rustc_interface[96c6593d249ce29a]::interface::run_compiler<(), rustc_driver_impl[3e109776558d5f8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[9fdad5ee2fa795]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
45: 0x7f10dd1e782c - <std[7ac4a4f233f64e32]::sys::thread::unix::Thread>::new::thread_start
46: 0x7f10d6ca597a - <unknown>
47: 0x7f10d6d292bc - <unknown>
48: 0x0 - <unknown>
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 1.96.0-nightly (0312931d8 2026-03-24) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [local_def_id_to_hir_id] getting HIR ID of `b::{closure#0}`
#1 [sanitizer_settings_for] checking what set of sanitizers are enabled on `b::{closure#0}`
#2 [sanitizer_settings_for] checking what set of sanitizers are enabled on `b::{closure#0}::foo`
#3 [codegen_fn_attrs] computing codegen attributes of `b::{closure#0}::foo`
#4 [lower_delayed_owner] lowering the delayed AST owner `b::{closure#0}::bar`
#5 [hir_crate_items] getting HIR crate items
#6 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0658`.
@rustbot label +F-fn_delegation