Closed
Description
auto-reduced (treereduce-rust):
macro_rules! m {
($abi : literal) => { extern $abi }
}
fn main() {
m!(-2)
}original:
macro_rules! m {
($abi : literal) => { extern $abi } //~ ERROR expected expression, found keyword `extern`
}
fn main() {
m!(-2)
}Version information
rustc 1.88.0-nightly (b8005bff3 2025-04-20)
binary: rustc
commit-hash: b8005bff3248cfc6e327faf4fa631ac49bb49ba9
commit-date: 2025-04-20
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2
Possibly related line of code:
rust/compiler/rustc_parse/src/parser/expr.rs
Lines 2161 to 2173 in b8005bf
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
thread 'rustc' panicked at compiler/rustc_parse/src/parser/expr.rs:2167:21:
didn't reparse a literal
stack backtrace:
0: 0x7796dc0bfa13 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hd3d6a01c34b68e33
1: 0x7796dc805b07 - core::fmt::write::hc8609d2830ea7209
2: 0x7796ddca2b11 - std::io::Write::write_fmt::h5803b161d154e6bb
3: 0x7796dc0bf872 - std::sys::backtrace::BacktraceLock::print::h7d1ba71c4ac8a197
4: 0x7796dc0c31ea - std::panicking::default_hook::{{closure}}::h81636b35691bb80d
5: 0x7796dc0c2d6f - std::panicking::default_hook::h3d6df3ec9a366961
6: 0x7796db1439a3 - std[a4b1c5db45b5369]::panicking::update_hook::<alloc[a753183b20116edd]::boxed::Box<rustc_driver_impl[64822a3bbb8e5a99]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x7796dc0c3a63 - std::panicking::rust_panic_with_hook::hc0072f606cfb3c45
8: 0x7796dc0c3726 - std::panicking::begin_panic_handler::{{closure}}::h9dfbf037bfb6d7d4
9: 0x7796dc0bfee9 - std::sys::backtrace::__rust_end_short_backtrace::hdeb7489c831217fd
10: 0x7796dc0c341d - __rustc[d3657d69ef8eb27f]::rust_begin_unwind
11: 0x7796d8a86440 - core::panicking::panic_fmt::h3cd888558dd93878
12: 0x7796dcc8af2a - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_opt_meta_item_lit
13: 0x7796dcc89b21 - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_abi
14: 0x7796dd292961 - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_item_foreign_mod
15: 0x7796dd2a0365 - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_item_kind
16: 0x7796dd29c2b6 - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_item_common
17: 0x7796dd288229 - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_stmt_without_recovery
18: 0x7796dd286b4d - <rustc_parse[1eb829f8d0d4d997]::parser::Parser>::parse_full_stmt
19: 0x7796ddbf56c6 - rustc_expand[bc4e8c07b7b0cd92]::expand::parse_ast_fragment
20: 0x7796ddbbb5e1 - <rustc_expand[bc4e8c07b7b0cd92]::expand::MacroExpander>::fully_expand_fragment
21: 0x7796ddb7a877 - <rustc_expand[bc4e8c07b7b0cd92]::expand::MacroExpander>::expand_crate
22: 0x7796dcf3e0fb - rustc_interface[87387720858aeda]::passes::resolver_for_lowering_raw
23: 0x7796dcf3d50d - rustc_query_impl[f9677782d554bbe0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[f9677782d554bbe0]::query_impl::resolver_for_lowering_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[105e55ff3e6629a7]::query::erase::Erased<[u8; 16usize]>>
24: 0x7796dcf3d4e9 - <rustc_query_impl[f9677782d554bbe0]::query_impl::resolver_for_lowering_raw::dynamic_query::{closure#2} as core[89ea4ceba863dd14]::ops::function::FnOnce<(rustc_middle[105e55ff3e6629a7]::ty::context::TyCtxt, ())>>::call_once
25: 0x7796dd8134d1 - rustc_query_system[6c94265d9bb07c02]::query::plumbing::try_execute_query::<rustc_query_impl[f9677782d554bbe0]::DynamicConfig<rustc_query_system[6c94265d9bb07c02]::query::caches::SingleCache<rustc_middle[105e55ff3e6629a7]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[f9677782d554bbe0]::plumbing::QueryCtxt, false>
26: 0x7796dd813040 - rustc_query_impl[f9677782d554bbe0]::query_impl::resolver_for_lowering_raw::get_query_non_incr::__rust_end_short_backtrace
27: 0x7796ddb1ed73 - rustc_interface[87387720858aeda]::passes::create_and_enter_global_ctxt::<core[89ea4ceba863dd14]::option::Option<rustc_interface[87387720858aeda]::queries::Linker>, rustc_driver_impl[64822a3bbb8e5a99]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
28: 0x7796dd955404 - rustc_interface[87387720858aeda]::interface::run_compiler::<(), rustc_driver_impl[64822a3bbb8e5a99]::run_compiler::{closure#0}>::{closure#1}
29: 0x7796dd6ecd68 - std[a4b1c5db45b5369]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[87387720858aeda]::util::run_in_thread_with_globals<rustc_interface[87387720858aeda]::util::run_in_thread_pool_with_globals<rustc_interface[87387720858aeda]::interface::run_compiler<(), rustc_driver_impl[64822a3bbb8e5a99]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
30: 0x7796dd6ed1b4 - <<std[a4b1c5db45b5369]::thread::Builder>::spawn_unchecked_<rustc_interface[87387720858aeda]::util::run_in_thread_with_globals<rustc_interface[87387720858aeda]::util::run_in_thread_pool_with_globals<rustc_interface[87387720858aeda]::interface::run_compiler<(), rustc_driver_impl[64822a3bbb8e5a99]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[89ea4ceba863dd14]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
31: 0x7796dd6ee5b7 - std::sys::pal::unix::thread::Thread::new::thread_start::h763527da6478f178
32: 0x7796d765d70a - <unknown>
33: 0x7796d76e1aac - <unknown>
34: 0x0 - <unknown>
error: the compiler unexpectedly panicked. this is a bug.
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 1.88.0-nightly (b8005bff3 2025-04-20) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [resolver_for_lowering_raw] getting the resolver for lowering
end of query stack