[ICE]: ` don't parse a statement if you see '}'`

[matthiaskrgr]

snippet:

fn main() { pub }

Version information

rustc 1.99.0-nightly (d3663963c 2026-07-29)
binary: rustc
commit-hash: d3663963ca08f465d01d283a7199778902623bb9
commit-date: 2026-07-29
host: x86_64-unknown-linux-gnu
release: 1.99.0-nightly
LLVM version: 22.1.8

Possibly related line of code:

rust/compiler/rustc_parse/src/parser/stmt.rs

Lines 167 to 179 in d366396

	} else if self.eat(exp!(Semi)) {
	// Do not attempt to parse an expression if we're done here.
	self.error_outer_attrs(attrs)?;
	self.mk_stmt(lo, StmtKind::Empty)
	} else if self.token == token::CloseBrace {
	self.error_outer_attrs(attrs)?;
	self.dcx().span_bug(self.token.span, "don't parse a statement if you see `}`");
	} else {
	// Remainder are line-expr stmts. This is similar to the `parse_stmt_path_start` case
	// above.
	let restrictions =
	if force_full_expr { Restrictions::empty() } else { Restrictions::STMT_EXPR };
	let e = self.collect_tokens(

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error: visibility `pub` is not followed by an item
 --> /tmp/icemaker_global_tempdir.85Auzek59MzW/rustc_testrunner_tmpdir_reporting.IMYecndfGNap/mvce.rs:1:13
  |
1 | fn main() { pub }
  |             ^^^ the visibility
  |
  = help: you likely meant to define an item, e.g., `pub fn foo() {}`

error: internal compiler error: don't parse a statement if you see `}`
 --> /tmp/icemaker_global_tempdir.85Auzek59MzW/rustc_testrunner_tmpdir_reporting.IMYecndfGNap/mvce.rs:1:17
  |
1 | fn main() { pub }
  |                 ^


thread 'rustc' (1821747) panicked at /rustc-dev/d3663963ca08f465d01d283a7199778902623bb9/compiler/rustc_parse/src/parser/stmt.rs:173:24:
Box<dyn Any>
stack backtrace:
   0:     0x7fc8384b3046 - <<std[de18a84e87bef96]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[11760cdd6396813d]::fmt::Display>::fmt
   1:     0x7fc838c0ad52 - core[11760cdd6396813d]::fmt::write
   2:     0x7fc8384c818c - <std[de18a84e87bef96]::sys::stdio::unix::Stderr as core[11760cdd6396813d]::io::write::Write>::write_fmt
   3:     0x7fc838484c1a - std[de18a84e87bef96]::panicking::default_hook::{closure#0}
   4:     0x7fc8384a5723 - std[de18a84e87bef96]::panicking::default_hook
   5:     0x7fc837419e0b - std[de18a84e87bef96]::panicking::update_hook::<alloc[6d2f5dc59fc5ad00]::boxed::Box<rustc_driver_impl[80ca0a791fc64eb4]::install_ice_hook::{closure#1}>>::{closure#0}
   6:     0x7fc8384a5bc2 - std[de18a84e87bef96]::panicking::panic_with_hook
   7:     0x7fc837447bd4 - std[de18a84e87bef96]::panicking::begin_panic::<rustc_errors[3360ec22066709a2]::ExplicitBug>::{closure#0}
   8:     0x7fc837440926 - std[de18a84e87bef96]::sys::backtrace::__rust_end_short_backtrace::<std[de18a84e87bef96]::panicking::begin_panic<rustc_errors[3360ec22066709a2]::ExplicitBug>::{closure#0}, !>
   9:     0x7fc83743e967 - std[de18a84e87bef96]::panicking::begin_panic::<rustc_errors[3360ec22066709a2]::ExplicitBug>
  10:     0x7fc837453781 - <rustc_errors[3360ec22066709a2]::diagnostic::BugAbort as rustc_errors[3360ec22066709a2]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  11:     0x7fc837c9c175 - <rustc_errors[3360ec22066709a2]::DiagCtxtHandle>::span_bug::<rustc_span[22444b93dc8c3ee6]::span_encoding::Span, &str>
  12:     0x7fc838d03070 - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_stmt_without_recovery
  13:     0x7fc838cfa4a6 - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_block_common
  14:     0x7fc838d09c3d - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_fn
  15:     0x7fc838d8e92c - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_item_kind
  16:     0x7fc838d89f5a - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_item_common
  17:     0x7fc838d3ddd4 - <rustc_parse[cfe3938aa4a232f5]::parser::Parser>::parse_mod
  18:     0x7fc839d75abd - rustc_interface[2e32ffefb2ac5795]::passes::parse
  19:     0x7fc839d87750 - rustc_interface[2e32ffefb2ac5795]::interface::run_compiler::<(), rustc_driver_impl[80ca0a791fc64eb4]::run_compiler::{closure#0}>::{closure#2}
  20:     0x7fc839e05f24 - std[de18a84e87bef96]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[2e32ffefb2ac5795]::util::run_in_thread_with_globals<rustc_interface[2e32ffefb2ac5795]::util::run_in_thread_pool_with_globals<rustc_interface[2e32ffefb2ac5795]::interface::run_compiler<(), rustc_driver_impl[80ca0a791fc64eb4]::run_compiler::{closure#0}>::{closure#2}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  21:     0x7fc839e05ced - <std[de18a84e87bef96]::thread::lifecycle::spawn_unchecked<rustc_interface[2e32ffefb2ac5795]::util::run_in_thread_with_globals<rustc_interface[2e32ffefb2ac5795]::util::run_in_thread_pool_with_globals<rustc_interface[2e32ffefb2ac5795]::interface::run_compiler<(), rustc_driver_impl[80ca0a791fc64eb4]::run_compiler::{closure#0}>::{closure#2}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[11760cdd6396813d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  22:     0x7fc839e1207a - <std[de18a84e87bef96]::sys::thread::unix::Thread>::new::thread_start
  23:     0x7fc833297739 - <unknown>
  24:     0x7fc83331bedc - <unknown>
  25:                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 1.99.0-nightly (d3663963c 2026-07-29) running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
error: aborting due to 2 previous errors

[chenyukang]

introduced by #159849