panic: `self.deferred_call_resolutions.is_empty()` missing `]`

const _: usize = _usize as [[]; (|| )()

RUSTFLAGS="" ~/.rustup/toolchains/master/bin/rust-analyzer highlight < code.rs

thread 'main' (3610025) panicked at src/tools/rust-analyzer/crates/hir-ty/src/infer/closure/analysis.rs:206:9:
assertion failed: self.deferred_call_resolutions.is_empty()
stack backtrace:
   0:     0x7fc050a0a566 - <<std[7a677e1801b0b374]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[8947f86082328bb0]::fmt::Display>::fmt
   1:     0x7fc05100ec88 - core[8947f86082328bb0]::fmt::write
   2:     0x7fc050a1f9dc - <std[7a677e1801b0b374]::sys::stdio::unix::Stderr as core[8947f86082328bb0]::io::write::Write>::write_fmt
   3:     0x7fc0509de8ea - std[7a677e1801b0b374]::panicking::default_hook::{closure#0}
   4:     0x7fc0509fcc83 - std[7a677e1801b0b374]::panicking::default_hook
   5:     0x7fc0509fd0eb - std[7a677e1801b0b374]::panicking::panic_with_hook
   6:     0x7fc0509de9d4 - std[7a677e1801b0b374]::panicking::panic_handler::{closure#0}
   7:     0x7fc0509d2e89 - std[7a677e1801b0b374]::sys::backtrace::__rust_end_short_backtrace::<std[7a677e1801b0b374]::panicking::panic_handler::{closure#0}, !>
   8:     0x7fc0509e02fd - __rustc[3266c8557f45551c]::rust_begin_unwind
   9:     0x7fc04d75c47c - core[8947f86082328bb0]::panicking::panic_fmt
  10:     0x7fc04db907b2 - core[8947f86082328bb0]::panicking::panic
  11:     0x562524a2e1bd - hir_ty[93cf116e5217208d]::infer::infer_finalize
  12:     0x562524921812 - <salsa[f6baacb4446d11cc]::function::IngredientImpl<<hir_ty[93cf116e5217208d]::infer::InferenceResult>::for_anon_const::_::for_anon_const__Configuration_>>::execute
  13:     0x562524900042 - <salsa[f6baacb4446d11cc]::function::IngredientImpl<<hir_ty[93cf116e5217208d]::infer::InferenceResult>::for_anon_const::_::for_anon_const__Configuration_>>::fetch
  14:     0x562524714d0c - <std[7a677e1801b0b374]::thread::local::LocalKey<salsa[f6baacb4446d11cc]::attach::Attached>>::with::<salsa[f6baacb4446d11cc]::attach::attach<&hir_ty[93cf116e5217208d]::infer::InferenceResult, dyn hir_ty[93cf116e5217208d]::db::HirDatabase, <hir_ty[93cf116e5217208d]::infer::InferenceResult>::for_anon_const::for_anon_const_::{closure#0}>::{closure#0}, &hir_ty[93cf116e5217208d]::infer::InferenceResult>
  15:     0x562524a29ed2 - hir_ty[93cf116e5217208d]::infer::infer_finalize
  16:     0x562524a33a6f - hir_ty[93cf116e5217208d]::infer::infer_query_with_inspect
  17:     0x5625249234a4 - <salsa[f6baacb4446d11cc]::function::IngredientImpl<<hir_ty[93cf116e5217208d]::infer::InferenceResult>::for_body::_::for_body__Configuration_>>::execute
  18:     0x5625246ee377 - <salsa[f6baacb4446d11cc]::attach::Attached>::attach::<dyn hir_ty[93cf116e5217208d]::db::HirDatabase, &hir_ty[93cf116e5217208d]::infer::InferenceResult, <hir_ty[93cf116e5217208d]::infer::InferenceResult>::for_body::for_body_::{closure#0}>
  19:     0x56252434dc3c - <hir[7d9bbb24bae6c127]::semantics::SemanticsImpl>::get_unsafe_ops
  20:     0x562524cb8313 - ide[6233e951667d8107]::syntax_highlighting::highlight
  21:     0x562524cf203e - ide[6233e951667d8107]::syntax_highlighting::html::highlight_as_html_with_config
  22:     0x562524c58e4c - <ide[6233e951667d8107]::Analysis>::highlight_as_html
  23:     0x5625256a7932 - <rust_analyzer[9f47c25af0fec260]::cli::flags::Highlight>::run
  24:     0x5625259470f4 - rust_analyzer[9193986eb7972329]::main
  25:     0x5625258dd7d3 - std[7a677e1801b0b374]::sys::backtrace::__rust_begin_short_backtrace::<fn() -> core[8947f86082328bb0]::result::Result<std[7a677e1801b0b374]::process::ExitCode, anyhow[6c3359fcb7bf7f47]::Error>, core[8947f86082328bb0]::result::Result<std[7a677e1801b0b374]::process::ExitCode, anyhow[6c3359fcb7bf7f47]::Error>>
  26:     0x562525940142 - std[7a677e1801b0b374]::rt::lang_start::<core[8947f86082328bb0]::result::Result<std[7a677e1801b0b374]::process::ExitCode, anyhow[6c3359fcb7bf7f47]::Error>>::{closure#0}
  27:     0x7fc05216b599 - std[7a677e1801b0b374]::rt::lang_start_internal
  28:     0x562525960238 - main
  29:     0x7fc04ba27741 - <unknown>
  30:     0x7fc04ba27879 - __libc_start_main
  31:     0x562524251709 - <unknown>
  32:                0x0 - <unknown>

rust-analyzer 1.99.0-nightly (da80ed0 2026-07-14)

Reproduce the panic with the rust-analyzer highlight command and the provided Rust snippet. Start at src/tools/rust-analyzer/crates/hir-ty/src/infer/closure/analysis.rs:206, then trace inference finalization and deferred call resolutions. Done means highlighting this input completes without the assertion panic, with regression coverage for the reproducer.