regression: ICE: expr in place where literal is expected (builtin attr parsing)

[jieyouxu]

Tip

This is not a duplicate of #140219, this one is delayed at compiler/rustc_attr_parsing/src/parser.rs:498:34 and was found via crater, that is known to impact user macros. This is extracted from #137687 (comment).

Crater results

Crater #139827:

• https://crater-reports.s3.amazonaws.com/beta-1.87-2/beta-2025-04-13/gh/0x4C656F.levi.rs/log.txt

  ICE backtrace

  [INFO] [stdout] note: no errors encountered even though delayed bugs were created
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] note: those delayed bugs will now be shown as internal compiler errors
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] error: internal compiler error: expr in place where literal is expected (builtin attr parsing)
  [INFO] [stdout]   --> src/errors.rs:5:37
  [INFO] [stdout]    |
  [INFO] [stdout] 5  |         #[error("({} {})  ", $code, $text)]
  [INFO] [stdout]    |                                     ^^^^^
  [INFO] [stdout] ...
  [INFO] [stdout] 52 | define_exception!(UnauthorizedException, 401, "Unauthorized".to_string());
  [INFO] [stdout]    | ------------------------------------------------------------------------- in this macro invocation
  [INFO] [stdout]    |
  [INFO] [stdout] note: delayed at compiler/rustc_attr_parsing/src/parser.rs:498:34
  [INFO] [stdout]          0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
  [INFO] [stdout]          1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
  [INFO] [stdout]          2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  [INFO] [stdout]          3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
  [INFO] [stdout]          4: <rustc_attr_parsing::parser::MetaItemListParserContext>::next
  [INFO] [stdout]          5: <rustc_ast_lowering::LoweringContext>::lower_attrs_vec
  [INFO] [stdout]          6: <rustc_ast_lowering::item::ItemLowerer>::lower_node
  [INFO] [stdout]          7: rustc_ast_lowering::lower_to_hir
  [INFO] [stdout]          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]>>
  [INFO] [stdout]          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>
  [INFO] [stdout]         10: rustc_query_impl::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::opt_hir_owner_nodes::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         13: rustc_query_impl::query_impl::opt_hir_owner_nodes::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         14: <rustc_middle::ty::context::TyCtxt>::expect_hir_owner_nodes
  [INFO] [stdout]         15: rustc_middle::hir::map::hir_crate_items
  [INFO] [stdout]         16: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::hir_crate_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         17: 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>
  [INFO] [stdout]         18: rustc_query_impl::query_impl::hir_crate_items::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         19: rustc_interface::proc_macro_decls::proc_macro_decls_static
  [INFO] [stdout]         20: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::proc_macro_decls_static::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 4]>>
  [INFO] [stdout]         21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 4]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         22: rustc_query_impl::query_impl::proc_macro_decls_static::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         23: rustc_interface::passes::run_required_analyses
  [INFO] [stdout]         24: rustc_interface::passes::analysis
  [INFO] [stdout]         25: 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; 0]>>
  [INFO] [stdout]         26: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         27: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         28: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  [INFO] [stdout]         29: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
  [INFO] [stdout]         30: std::sys::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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  [INFO] [stdout]         31: <<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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  [INFO] [stdout]         32: std::sys::pal::unix::thread::Thread::new::thread_start
  [INFO] [stdout]         33: <unknown>
  [INFO] [stdout]         34: clone
  
  [... trimmed ...]
  
  [INFO] [stderr] 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
  [INFO] [stderr] 
  [INFO] [stderr] note: rustc 1.87.0-beta.4 (a5948295b 2025-04-12) running on x86_64-unknown-linux-gnu
  [INFO] [stderr] 
  [INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
  [INFO] [stderr] 
  [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
  [INFO] [stderr] 
  [INFO] [stderr] query stack during panic:
  [INFO] [stderr] end of query stack
  [INFO] [stderr] error: could not compile `levi` (lib); 1 warning emitted
  

• https://crater-reports.s3.amazonaws.com/beta-1.87-2/beta-2025-04-13/gh/Hywan.weld/log.txt

  ICE backtrace

  [INFO] [stdout] note: no errors encountered even though delayed bugs were created
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] note: those delayed bugs will now be shown as internal compiler errors
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] error: internal compiler error: expr in place where literal is expected (builtin attr parsing)
  [INFO] [stdout]   --> crates/linker/src/linker.rs:19:1
  [INFO] [stdout]    |
  [INFO] [stdout] 19 | / error! {
  [INFO] [stdout] 20 | |     #[doc = "Linker errors."]
  [INFO] [stdout] 21 | |     pub enum Error {
  [INFO] [stdout] 22 | |         #[code = E002]
  [INFO] [stdout] ...  |
  [INFO] [stdout] 37 | | }
  [INFO] [stdout]    | |_^
  [INFO] [stdout]    |
  [INFO] [stdout] note: delayed at compiler/rustc_attr_parsing/src/parser.rs:498:34
  [INFO] [stdout]          0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
  [INFO] [stdout]          1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
  [INFO] [stdout]          2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  [INFO] [stdout]          3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
  [INFO] [stdout]          4: <rustc_attr_parsing::parser::MetaItemListParserContext>::next
  [INFO] [stdout]          5: <rustc_ast_lowering::LoweringContext>::lower_attrs_vec
  [INFO] [stdout]          6: <rustc_ast_lowering::LoweringContext>::lower_attrs
  [INFO] [stdout]          7: <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_ast::ast::Variant>, <rustc_ast_lowering::LoweringContext>::lower_item_kind::{closure#6}::{closure#0}> as core::iter::traits::iterator::Iterator>::next
  [INFO] [stdout]          8: <rustc_ast_lowering::LoweringContext>::lower_item_kind
  [INFO] [stdout]          9: <rustc_ast_lowering::item::ItemLowerer>::lower_node
  [INFO] [stdout]         10: rustc_ast_lowering::lower_to_hir
  [INFO] [stdout]         11: 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]>>
  [INFO] [stdout]         12: 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>
  [INFO] [stdout]         13: rustc_query_impl::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::opt_hir_owner_nodes::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         16: rustc_query_impl::query_impl::opt_hir_owner_nodes::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         17: <rustc_middle::ty::context::TyCtxt>::expect_hir_owner_nodes
  [INFO] [stdout]         18: rustc_middle::hir::map::hir_crate_items
  [INFO] [stdout]         19: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::hir_crate_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         20: 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>
  [INFO] [stdout]         21: rustc_query_impl::query_impl::hir_crate_items::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         22: rustc_interface::proc_macro_decls::proc_macro_decls_static
  [INFO] [stdout]         23: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::proc_macro_decls_static::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 4]>>
  [INFO] [stdout]         24: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 4]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         25: rustc_query_impl::query_impl::proc_macro_decls_static::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         26: rustc_interface::passes::run_required_analyses
  [INFO] [stdout]         27: rustc_interface::passes::analysis
  [INFO] [stdout]         28: 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; 0]>>
  [INFO] [stdout]         29: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         30: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         31: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  [INFO] [stdout]         32: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
  [INFO] [stdout]         33: std::sys::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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  [INFO] [stdout]         34: <<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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  [INFO] [stdout]         35: std::sys::pal::unix::thread::Thread::new::thread_start
  [INFO] [stdout]         36: <unknown>
  [INFO] [stdout]         37: clone
  [INFO] [stdout]   --> crates/linker/src/linker.rs:19:1
  [INFO] [stdout]    |
  [INFO] [stdout] 19 | / error! {
  [INFO] [stdout] 20 | |     #[doc = "Linker errors."]
  [INFO] [stdout] 21 | |     pub enum Error {
  [INFO] [stdout] 22 | |         #[code = E002]
  [INFO] [stdout] ...  |
  [INFO] [stdout] 37 | | }
  [INFO] [stdout]    | |_^
  [INFO] [stdout]    = note: this error: internal compiler error originates in the macro `error` (in Nightly builds, run with -Z macro-backtrace for more info)
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stderr] 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
  [INFO] [stderr] 
  [INFO] [stderr] note: rustc 1.87.0-beta.4 (a5948295b 2025-04-12) running on x86_64-unknown-linux-gnu
  [INFO] [stderr] 
  [INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
  [INFO] [stderr] 
  [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
  [INFO] [stderr] 
  [INFO] [stderr] query stack during panic:
  [INFO] [stderr] end of query stack
  [INFO] [stderr] error: could not compile `weld-linker` (lib)
  

• https://crater-reports.s3.amazonaws.com/beta-1.87-2/beta-2025-04-13/gh/oberien.rebo/log.txt

  ICE backtrace

  [INFO] [stdout] note: no errors encountered even though delayed bugs were created
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] note: those delayed bugs will now be shown as internal compiler errors
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stdout] error: internal compiler error: expr in place where literal is expected (builtin attr parsing)
  [INFO] [stdout]    --> rebo/src/lexer/token.rs:58:38
  [INFO] [stdout]     |
  [INFO] [stdout] 58  |               #[display(fmt = $fmt $(, $fmtarg)*)]
  [INFO] [stdout]     |                                        ^^^^^^^
  [INFO] [stdout] ...
  [INFO] [stdout] 102 | / gen_tokens! {
  [INFO] [stdout] 103 | |     // primitives
  [INFO] [stdout] 104 | |     Ident<'i>, TokenIdent, "ident", {ident: &'i str,}, (fmt = "{}", ident), (Copy, Eq, Hash);
  [INFO] [stdout] 105 | |     DqString, TokenDqString, "double-quoted string", {string: String,}, (fmt = "{:?}", string), (Eq, Hash);
  [INFO] [stdout] ...   |
  [INFO] [stdout] 171 | |     Eof, TokenEof, "EOF", {}, (fmt = "EOF");
  [INFO] [stdout] 172 | | }
  [INFO] [stdout]     | |_- in this macro invocation
  [INFO] [stdout]     |
  [INFO] [stdout] note: delayed at compiler/rustc_attr_parsing/src/parser.rs:498:34
  [INFO] [stdout]          0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
  [INFO] [stdout]          1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
  [INFO] [stdout]          2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  [INFO] [stdout]          3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
  [INFO] [stdout]          4: <rustc_attr_parsing::parser::MetaItemListParserContext>::next
  [INFO] [stdout]          5: <rustc_ast_lowering::LoweringContext>::lower_attrs_vec
  [INFO] [stdout]          6: <rustc_ast_lowering::item::ItemLowerer>::lower_node
  [INFO] [stdout]          7: rustc_ast_lowering::lower_to_hir
  [INFO] [stdout]          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]>>
  [INFO] [stdout]          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>
  [INFO] [stdout]         10: rustc_query_impl::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::opt_hir_owner_nodes::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         13: rustc_query_impl::query_impl::opt_hir_owner_nodes::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         14: <rustc_middle::ty::context::TyCtxt>::expect_hir_owner_nodes
  [INFO] [stdout]         15: rustc_middle::hir::map::hir_crate_items
  [INFO] [stdout]         16: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::hir_crate_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  [INFO] [stdout]         17: 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>
  [INFO] [stdout]         18: rustc_query_impl::query_impl::hir_crate_items::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         19: rustc_interface::proc_macro_decls::proc_macro_decls_static
  [INFO] [stdout]         20: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::proc_macro_decls_static::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 4]>>
  [INFO] [stdout]         21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 4]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         22: rustc_query_impl::query_impl::proc_macro_decls_static::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         23: rustc_interface::passes::run_required_analyses
  [INFO] [stdout]         24: rustc_interface::passes::analysis
  [INFO] [stdout]         25: 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; 0]>>
  [INFO] [stdout]         26: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  [INFO] [stdout]         27: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  [INFO] [stdout]         28: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  [INFO] [stdout]         29: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
  [INFO] [stdout]         30: std::sys::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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  [INFO] [stdout]         31: <<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<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  [INFO] [stdout]         32: std::sys::pal::unix::thread::Thread::new::thread_start
  [INFO] [stdout]         33: <unknown>
  [INFO] [stdout]         34: clone
  [INFO] [stdout]    --> rebo/src/lexer/token.rs:58:38
  [INFO] [stdout]     |
  [INFO] [stdout] 58  |               #[display(fmt = $fmt $(, $fmtarg)*)]
  [INFO] [stdout]     |                                        ^^^^^^^
  [INFO] [stdout] ...
  [INFO] [stdout] 102 | / gen_tokens! {
  [INFO] [stdout] 103 | |     // primitives
  [INFO] [stdout] 104 | |     Ident<'i>, TokenIdent, "ident", {ident: &'i str,}, (fmt = "{}", ident), (Copy, Eq, Hash);
  [INFO] [stdout] 105 | |     DqString, TokenDqString, "double-quoted string", {string: String,}, (fmt = "{:?}", string), (Eq, Hash);
  [INFO] [stdout] ...   |
  [INFO] [stdout] 171 | |     Eof, TokenEof, "EOF", {}, (fmt = "EOF");
  [INFO] [stdout] 172 | | }
  [INFO] [stdout]     | |_- in this macro invocation
  [INFO] [stdout]     = note: this error: internal compiler error originates in the macro `gen_tokens` (in Nightly builds, run with -Z macro-backtrace for more info)
  [INFO] [stdout] 
  [INFO] [stdout] 
  [INFO] [stderr] 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
  [INFO] [stderr] 
  [INFO] [stderr] note: rustc 1.87.0-beta.4 (a5948295b 2025-04-12) running on x86_64-unknown-linux-gnu
  [INFO] [stderr] 
  [INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
  [INFO] [stderr] 
  [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
  [INFO] [stderr] 
  [INFO] [stderr] query stack during panic:
  [INFO] [stderr] end of query stack
  [INFO] [stderr] error: could not compile `rebo` (lib)
  

Version it worked on

It most recently worked on: 1.86.0

Version with regression

rustc 1.87.0-beta.4 (a594829 2025-04-12) in crater #139827.

---

@rustbot modify labels: +regression-from-stable-to-beta -regression-untriaged

[jieyouxu]

@theemathas's MCVE from #137687 (comment) reproduced here:

---

Minimized from the levi repo (from the crater results):

src/lib.rs:

macro_rules! call_macro {
    ($text:expr) => {
        #[derive(bar::Bar)]
        #[arg($text)]
        pub struct Foo;
    };
}

call_macro!(1 + 1);

bar/src/lib.rs

extern crate proc_macro;

use proc_macro::TokenStream;

#[proc_macro_derive(Bar, attributes(arg))]
pub fn derive_bar(_: proc_macro::TokenStream) -> proc_macro::TokenStream {
    TokenStream::new()
}

Zip of all files required for reproduction: repro.zip

[jieyouxu]

@fmease's remark on #137687 (comment) edited to clarify which issue it refers to:

---

Nota bene: ICE #137687 != the 3 ICEs from the crater regression (this issue #140612)! ICE #137687 triggers the delayed_span_bugs found in compiler/rustc_attr_parsing/src/parser.rs:359:24 and compiler/rustc_attr_parsing/src/context.rs:336:43 while this ICE #140612 and MCVE trigger a different one, namely compiler/rustc_attr_parsing/src/parser.rs:498:34.

This is relevant/important because PR #124141 unintentionally fixed these crater regressions (#140612) and ICE on master but not ICE #137687 (of which we don't know if it's likely to be hit by real users and thus worth hotfixing on beta). For that, subscribe to draft PR #140584.