ice: no resolution for an import

[matthiaskrgr]

Code

use ::{}; fn main() {}

Meta

rustc --version --verbose:

rustc 1.78.0-nightly (af88f7db5 2024-02-08)
binary: rustc
commit-hash: af88f7db51f6f2a1472f9279d7c7e7c822afff77
commit-date: 2024-02-08
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 17.0.6

Error output

<output>

Backtrace

warning: unused import: `::{}`
 --> 08D75AC466B02457D5C4F4BDCCE0271869625FFC766C1ECE2C2483B3DB3E449C.rs:3:5
  |
3 | use ::{}; fn main() {}
  |     ^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

note: no errors encountered even though delayed bugs were created

note: those delayed bugs will now be shown as internal compiler errors

error: internal compiler error: no resolution for an import
 --> 08D75AC466B02457D5C4F4BDCCE0271869625FFC766C1ECE2C2483B3DB3E449C.rs:3:5
  |
3 | use ::{}; fn main() {}
  |     ^^^^
  |
note: delayed at compiler/rustc_ast_lowering/src/lib.rs:757:24
         0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
         1: <rustc_errors::DiagCtxt>::emit_diagnostic
         2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee
         3: <rustc_ast_lowering::LoweringContext>::lower_import_res
         4: <rustc_ast_lowering::LoweringContext>::lower_use_tree
         5: <rustc_ast_lowering::LoweringContext>::lower_item_kind
         6: <rustc_ast_lowering::item::ItemLowerer>::lower_node
         7: rustc_ast_lowering::lower_to_hir
         8: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::hir_crate::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
         9: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        10: rustc_query_impl::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace
        11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::hir_attrs::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_hir::hir_id::OwnerId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        13: rustc_query_impl::query_impl::hir_attrs::get_query_non_incr::__rust_end_short_backtrace
        14: <rustc_middle::hir::map::Map>::attrs
        15: rustc_passes::entry::entry_fn
        16: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::entry_fn::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 12]>>
        17: <rustc_query_impl::query_impl::entry_fn::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, ())>>::call_once
        18: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 12]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        19: rustc_query_impl::query_impl::entry_fn::get_query_non_incr::__rust_end_short_backtrace
        20: rustc_interface::passes::analysis
        21: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
        22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        23: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
        24: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
        25: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
        26: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
        27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                   at /rustc/8ace7ea1f7cbba7b4f031e66c54ca237a0d65de6/library/alloc/src/boxed.rs:2015:9
        28: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                   at /rustc/8ace7ea1f7cbba7b4f031e66c54ca237a0d65de6/library/alloc/src/boxed.rs:2015:9
        29: std::sys::pal::unix::thread::Thread::new::thread_start
                   at /rustc/8ace7ea1f7cbba7b4f031e66c54ca237a0d65de6/library/std/src/sys/pal/unix/thread.rs:108:17
        30: <unknown>
        31: <unknown>
 --> 08D75AC466B02457D5C4F4BDCCE0271869625FFC766C1ECE2C2483B3DB3E449C.rs:3:5
  |
3 | use ::{}; fn main() {}
  |     ^^^^

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 attach the file at `/tmp/im/rustc-ice-2024-02-08T16_41_58-1021684.txt` to your bug report

query stack during panic:
end of query stack
error: aborting due to 1 previous error; 1 warning emitted

[petrochenkov]

Regression from #120609.

[petrochenkov]

Fixed in #120850.