error[E0425]: cannot find function `a` in this scope --> /tmp/icemaker_global_tempdir.GOBsuI6uLW7V/rustc_testrunner_tmpdir_reporting.68eevxTlR5Y2/mvce.rs:1:7 | 1 | reuse a as b { | ^ not found in this scope error[E0425]: cannot find value `x` in this scope --> /tmp/icemaker_global_tempdir.GOBsuI6uLW7V/rustc_testrunner_tmpdir_reporting.68eevxTlR5Y2/mvce.rs:4:9 | 4 | x.add | ^ not found in this scope error[E0658]: functions delegation is not yet fully implemented --> /tmp/icemaker_global_tempdir.GOBsuI6uLW7V/rustc_testrunner_tmpdir_reporting.68eevxTlR5Y2/mvce.rs:1:1 | 1 | / reuse a as b { 2 | | || { 3 | | use std::ops::Add; 4 | | x.add 5 | | } 6 | | } | |_^ | = 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to the crate attributes to enable = note: this compiler was built on 2025-07-28; consider upgrading it if it is out of date error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.GOBsuI6uLW7V/rustc_testrunner_tmpdir_reporting.68eevxTlR5Y2/mvce.rs:6:2 | 6 | } | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.GOBsuI6uLW7V/rustc_testrunner_tmpdir_reporting.68eevxTlR5Y2/mvce.rs` error: internal compiler error: /rustc-dev/65b6cdb6a6d33987b9d642a4882283c71fbe3957/compiler/rustc_middle/src/hir/mod.rs:214:32: No HirId for DefId(0:4 ~ mvce[4656]::b::{closure#0}) thread 'rustc' panicked at /rustc-dev/65b6cdb6a6d33987b9d642a4882283c71fbe3957/compiler/rustc_middle/src/hir/mod.rs:214:32: Box<dyn Any> stack backtrace: 0: 0x711dc0fddea3 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hf5f52471e56b3c77 1: 0x711dc1802db7 - core::fmt::write::h84c41b9a432e75e8 2: 0x711dc0fd39b3 - std::io::Write::write_fmt::h1bed43fefa2c500a 3: 0x711dc0fddd02 - std::sys::backtrace::BacktraceLock::print::h37cadd86d3cdf2a2 4: 0x711dc0fe17a7 - std::panicking::default_hook::{{closure}}::he4900cfd4119c037 5: 0x711dc0fe130b - std::panicking::default_hook::h714d3e918eaabef3 6: 0x711dc0065bc3 - std[9de738f3b1df770f]::panicking::update_hook::<alloc[84fa6edd143b6b1]::boxed::Box<rustc_driver_impl[8b2e16b5426fe55f]::install_ice_hook::{closure#1}>>::{closure#0} 7: 0x711dc0fe1fee - std::panicking::rust_panic_with_hook::h288a274c83e34e7f 8: 0x711dc009f641 - std[9de738f3b1df770f]::panicking::begin_panic::<rustc_errors[9fa276623d937f2b]::ExplicitBug>::{closure#0} 9: 0x711dc00945d6 - std[9de738f3b1df770f]::sys::backtrace::__rust_end_short_backtrace::<std[9de738f3b1df770f]::panicking::begin_panic<rustc_errors[9fa276623d937f2b]::ExplicitBug>::{closure#0}, !> 10: 0x711dc0094467 - std[9de738f3b1df770f]::panicking::begin_panic::<rustc_errors[9fa276623d937f2b]::ExplicitBug> 11: 0x711dc00a90b1 - <rustc_errors[9fa276623d937f2b]::diagnostic::BugAbort as rustc_errors[9fa276623d937f2b]::diagnostic::EmissionGuarantee>::emit_producing_guarantee 12: 0x711dc06a97fa - rustc_middle[d2d672f435ff4af8]::util::bug::opt_span_bug_fmt::<rustc_span[848413984e4365d0]::span_encoding::Span>::{closure#0} 13: 0x711dc0689b4a - rustc_middle[d2d672f435ff4af8]::ty::context::tls::with_opt::<rustc_middle[d2d672f435ff4af8]::util::bug::opt_span_bug_fmt<rustc_span[848413984e4365d0]::span_encoding::Span>::{closure#0}, !>::{closure#0} 14: 0x711dc06899bb - rustc_middle[d2d672f435ff4af8]::ty::context::tls::with_context_opt::<rustc_middle[d2d672f435ff4af8]::ty::context::tls::with_opt<rustc_middle[d2d672f435ff4af8]::util::bug::opt_span_bug_fmt<rustc_span[848413984e4365d0]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !> 15: 0x711dbd6cde30 - rustc_middle[d2d672f435ff4af8]::util::bug::bug_fmt 16: 0x711dc1ab1d05 - rustc_query_impl[f908ec19bf25b89d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f908ec19bf25b89d]::query_impl::local_def_id_to_hir_id::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 8usize]>> 17: 0x711dc1ab1343 - rustc_query_system[8f3127010f038fd0]::query::plumbing::try_execute_query::<rustc_query_impl[f908ec19bf25b89d]::DynamicConfig<rustc_data_structures[3f190877304a9a41]::vec_cache::VecCache<rustc_span[848413984e4365d0]::def_id::LocalDefId, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[8f3127010f038fd0]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[f908ec19bf25b89d]::plumbing::QueryCtxt, false> 18: 0x711dc1ab0e4b - rustc_query_impl[f908ec19bf25b89d]::query_impl::local_def_id_to_hir_id::get_query_non_incr::__rust_end_short_backtrace 19: 0x711dc1ed31a9 - rustc_query_impl[f908ec19bf25b89d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f908ec19bf25b89d]::query_impl::hir_owner_parent::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 8usize]>> 20: 0x711dc1ed201b - rustc_query_system[8f3127010f038fd0]::query::plumbing::try_execute_query::<rustc_query_impl[f908ec19bf25b89d]::DynamicConfig<rustc_data_structures[3f190877304a9a41]::vec_cache::VecCache<rustc_hir[6fa30b83404d60f9]::hir_id::OwnerId, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[8f3127010f038fd0]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[f908ec19bf25b89d]::plumbing::QueryCtxt, false> 21: 0x711dc1ed1c0f - rustc_query_impl[f908ec19bf25b89d]::query_impl::hir_owner_parent::get_query_non_incr::__rust_end_short_backtrace 22: 0x711dc1ed70c2 - <rustc_middle[d2d672f435ff4af8]::lint::ShallowLintLevelMap>::lint_level_id_at_node 23: 0x711dc1ed6eef - <rustc_middle[d2d672f435ff4af8]::ty::context::TyCtxt>::lint_level_at_node 24: 0x711dc1ab21c8 - rustc_hir_analysis[f35b0b19c12bb529]::check_unused::check_unused_traits 25: 0x711dc28b9909 - rustc_query_impl[f908ec19bf25b89d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f908ec19bf25b89d]::query_impl::check_unused_traits::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 0usize]>> 26: 0x711dc28b94fc - rustc_query_system[8f3127010f038fd0]::query::plumbing::try_execute_query::<rustc_query_impl[f908ec19bf25b89d]::DynamicConfig<rustc_query_system[8f3127010f038fd0]::query::caches::SingleCache<rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[f908ec19bf25b89d]::plumbing::QueryCtxt, false> 27: 0x711dc28b9276 - rustc_query_impl[f908ec19bf25b89d]::query_impl::check_unused_traits::get_query_non_incr::__rust_end_short_backtrace 28: 0x711dc1aa8866 - rustc_hir_analysis[f35b0b19c12bb529]::check_crate 29: 0x711dc1aad106 - rustc_interface[ed6b3323245567cc]::passes::analysis 30: 0x711dc1aacdc9 - rustc_query_impl[f908ec19bf25b89d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f908ec19bf25b89d]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 0usize]>> 31: 0x711dc28b94fc - rustc_query_system[8f3127010f038fd0]::query::plumbing::try_execute_query::<rustc_query_impl[f908ec19bf25b89d]::DynamicConfig<rustc_query_system[8f3127010f038fd0]::query::caches::SingleCache<rustc_middle[d2d672f435ff4af8]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[f908ec19bf25b89d]::plumbing::QueryCtxt, false> 32: 0x711dc28b91d0 - rustc_query_impl[f908ec19bf25b89d]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 33: 0x711dc2cb208b - rustc_interface[ed6b3323245567cc]::passes::create_and_enter_global_ctxt::<core[a13b22b301c6dc6d]::option::Option<rustc_interface[ed6b3323245567cc]::queries::Linker>, rustc_driver_impl[8b2e16b5426fe55f]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0} 34: 0x711dc2aab11e - rustc_interface[ed6b3323245567cc]::interface::run_compiler::<(), rustc_driver_impl[8b2e16b5426fe55f]::run_compiler::{closure#0}>::{closure#1} 35: 0x711dc29b4181 - std[9de738f3b1df770f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[ed6b3323245567cc]::util::run_in_thread_with_globals<rustc_interface[ed6b3323245567cc]::util::run_in_thread_pool_with_globals<rustc_interface[ed6b3323245567cc]::interface::run_compiler<(), rustc_driver_impl[8b2e16b5426fe55f]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> 36: 0x711dc29b3e62 - <<std[9de738f3b1df770f]::thread::Builder>::spawn_unchecked_<rustc_interface[ed6b3323245567cc]::util::run_in_thread_with_globals<rustc_interface[ed6b3323245567cc]::util::run_in_thread_pool_with_globals<rustc_interface[ed6b3323245567cc]::interface::run_compiler<(), rustc_driver_impl[8b2e16b5426fe55f]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[a13b22b301c6dc6d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 37: 0x711dc29b9fc1 - std::sys::pal::unix::thread::Thread::new::thread_start::h8d82ba4296c67c8c 38: 0x711dbc2a57eb - <unknown> 39: 0x711dbc32918c - <unknown> 40: 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 1.90.0-nightly (65b6cdb6a 2025-07-28) 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 [hir_owner_parent] getting HIR parent of `b::{closure#0}::{use#0}` #2 [check_unused_traits] checking unused trait imports in crate #3 [analysis] running analysis passes on this crate end of query stack error: aborting due to 5 previous errors Some errors have detailed explanations: E0425, E0601, E0658. For more information about an error, try `rustc --explain E0425`.