ICE line_index < lines.len() #148684
Description
auto-reduced (treereduce-rust):
struct cat<U> {
info: Vec<U>,
meows: usize,
how_hungry: isize,
}
pub fn main() {
let mut nyan: cat<isize> = cat::<usize>(52, 99, vec![9]);
}original:
//@ run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
struct cat<U> {
info : Vec<U> ,
meows : usize,
how_hungry : isize,
}
impl<U> cat<U> {
pub fn speak<T>(&mut self, stuff: Vec<T> ) {
self.meows += stuff.len();
}
pub fn meow_count(&mut self) -> usize { self.meows }
}
fn speak<U>(in_x : usize, in_y : isize, in_info: T<U> ) -> cat<U> {
cat {
meows: in_x,
how_hungry: in_y,
info: in_info
}
}
pub fn main() {
let mut nyan : cat<isize> = cat::<usize>(52, 99, vec![9]);
let mut kitty = cat(1000, 2, vec!["tabby".to_string()]);
assert_eq!(nyan.how_hungry, 99);
assert_eq!(kitty.how_hungry, 2);
nyan.speak(vec![1,2,3]);
assert_eq!(nyan.meow_count(), 55);
kitty.speak(vec!["meow"to_string(), "mew".to_string(), "purr".to_string(), "chirp".to_string()]);
assert_eq!(kitty.meow_count(), 1004);
}Version information
rustc 1.93.0-nightly (843f8ce2e 2025-11-07)
binary: rustc
commit-hash: 843f8ce2ebc01d35a30484eadc8a84cdc6130844
commit-date: 2025-11-07
host: x86_64-unknown-linux-gnu
release: 1.93.0-nightly
LLVM version: 21.1.3
Possibly related line of code:
rust/compiler/rustc_span/src/lib.rs
Lines 2175 to 2187 in 843f8ce
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
warning: type `cat` should have an upper camel case name
--> /tmp/icemaker_global_tempdir.F1g5tlKFlisA/rustc_testrunner_tmpdir_reporting.JKto2pcPmdzW/mvce.rs:1:8
|
1 | struct cat<U> {
| ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cat`
|
= note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
thread 'rustc' (711452) panicked at compiler/rustc_span/src/lib.rs:2181:9:
assertion failed: line_index < lines.len()
stack backtrace:
0: 0x7ff2362619f3 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h34ffdfe5b35d09bd
1: 0x7ff236a01afc - core::fmt::write::h44fabcc2c45f5b01
2: 0x7ff236216473 - std::io::Write::write_fmt::h033bfcde7b068b45
3: 0x7ff236227b72 - std::sys::backtrace::BacktraceLock::print::h21726ec41a769a6e
4: 0x7ff23622dbc9 - std::panicking::default_hook::{{closure}}::h3fcc4b417ccd3280
5: 0x7ff23622d6f3 - std::panicking::default_hook::ha9aeb39b300b35c8
6: 0x7ff2352221a1 - std[70918e54a4c01c2f]::panicking::update_hook::<alloc[bd51d97ef4855f08]::boxed::Box<rustc_driver_impl[7b62307e987fdf9b]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x7ff23622dfef - std::panicking::panic_with_hook::h4253fc3c0f99d3b2
8: 0x7ff23622dd76 - std::panicking::panic_handler::{{closure}}::h279f7b42e8f430f3
9: 0x7ff236227cb9 - std::sys::backtrace::__rust_end_short_backtrace::haadc81f22413cc4f
10: 0x7ff2362087bd - __rustc[6a4d7f6399f48b20]::rust_begin_unwind
11: 0x7ff233289560 - core::panicking::panic_fmt::ha9b7d4a596fc9998
12: 0x7ff232c49dec - core::panicking::panic::h9218a293172c2784
13: 0x7ff237e30806 - rustc_errors[eb190226f309982d]::annotate_snippet_emitter_writer::shrink_file
14: 0x7ff237e2f0e9 - <core[6e2b95161510a05c]::iter::adapters::filter_map::FilterMap<core[6e2b95161510a05c]::iter::adapters::take::Take<alloc[bd51d97ef4855f08]::vec::into_iter::IntoIter<rustc_errors[eb190226f309982d]::Substitution>>, <rustc_errors[eb190226f309982d]::annotate_snippet_emitter_writer::AnnotateSnippetEmitter>::emit_messages_default::{closure#9}> as core[6e2b95161510a05c]::iter::traits::iterator::Iterator>::next
15: 0x7ff237e2ba85 - <rustc_errors[eb190226f309982d]::annotate_snippet_emitter_writer::AnnotateSnippetEmitter>::emit_messages_default
16: 0x7ff237effd36 - <rustc_errors[eb190226f309982d]::annotate_snippet_emitter_writer::AnnotateSnippetEmitter as rustc_errors[eb190226f309982d]::emitter::Emitter>::emit_diagnostic
17: 0x7ff237efc526 - <rustc_errors[eb190226f309982d]::DiagCtxtInner>::emit_diagnostic::{closure#3}
18: 0x7ff237efa03d - rustc_interface[ee8ca9de4d50d0ec]::callbacks::track_diagnostic::<core[6e2b95161510a05c]::option::Option<rustc_span[94b94e6084f0e502]::ErrorGuaranteed>>
19: 0x7ff237ef90b6 - <rustc_errors[eb190226f309982d]::DiagCtxtInner>::emit_diagnostic
20: 0x7ff237ef8f7f - <rustc_errors[eb190226f309982d]::DiagCtxtHandle>::emit_diagnostic
21: 0x7ff2333416e0 - <rustc_span[94b94e6084f0e502]::ErrorGuaranteed as rustc_errors[eb190226f309982d]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
22: 0x7ff236cf8480 - <rustc_hir_typeck[a64a265d251a4b4b]::fn_ctxt::FnCtxt>::check_expr_call
23: 0x7ff236ccb9b8 - <rustc_hir_typeck[a64a265d251a4b4b]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
24: 0x7ff236cad9c4 - <rustc_hir_typeck[a64a265d251a4b4b]::fn_ctxt::FnCtxt>::check_decl
25: 0x7ff236cc2983 - <rustc_hir_typeck[a64a265d251a4b4b]::fn_ctxt::FnCtxt>::check_expr_block
26: 0x7ff236ccb993 - <rustc_hir_typeck[a64a265d251a4b4b]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
27: 0x7ff236c74f71 - rustc_hir_typeck[a64a265d251a4b4b]::check::check_fn
28: 0x7ff237bbeae2 - rustc_hir_typeck[a64a265d251a4b4b]::typeck_with_inspect::{closure#0}
29: 0x7ff237bbd4ce - rustc_query_impl[6926355345ea658b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[6926355345ea658b]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[32956c401cc86bea]::query::erase::Erased<[u8; 8usize]>>
30: 0x7ff236d2a337 - rustc_query_system[3737e2f56d9982ce]::query::plumbing::try_execute_query::<rustc_query_impl[6926355345ea658b]::DynamicConfig<rustc_data_structures[72a506bfd180f26d]::vec_cache::VecCache<rustc_span[94b94e6084f0e502]::def_id::LocalDefId, rustc_middle[32956c401cc86bea]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[3737e2f56d9982ce]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[6926355345ea658b]::plumbing::QueryCtxt, false>
31: 0x7ff236d29cc9 - rustc_query_impl[6926355345ea658b]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
32: 0x7ff236d3ac2d - <rustc_middle[32956c401cc86bea]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_hir_analysis[85a88705f15666d0]::check_crate::{closure#2}>::{closure#0}
33: 0x7ff236d39e99 - rustc_hir_analysis[85a88705f15666d0]::check_crate
34: 0x7ff236d20470 - rustc_interface[ee8ca9de4d50d0ec]::passes::analysis
35: 0x7ff236d20133 - rustc_query_impl[6926355345ea658b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[6926355345ea658b]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[32956c401cc86bea]::query::erase::Erased<[u8; 0usize]>>
36: 0x7ff237a5c3e6 - rustc_query_system[3737e2f56d9982ce]::query::plumbing::try_execute_query::<rustc_query_impl[6926355345ea658b]::DynamicConfig<rustc_query_system[3737e2f56d9982ce]::query::caches::SingleCache<rustc_middle[32956c401cc86bea]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[6926355345ea658b]::plumbing::QueryCtxt, false>
37: 0x7ff237a5c03c - rustc_query_impl[6926355345ea658b]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
38: 0x7ff237cdb743 - <rustc_interface[ee8ca9de4d50d0ec]::passes::create_and_enter_global_ctxt<core[6e2b95161510a05c]::option::Option<rustc_interface[ee8ca9de4d50d0ec]::queries::Linker>, rustc_driver_impl[7b62307e987fdf9b]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[6e2b95161510a05c]::ops::function::FnOnce<(&rustc_session[57a374ecf4153235]::session::Session, rustc_middle[32956c401cc86bea]::ty::context::CurrentGcx, alloc[bd51d97ef4855f08]::sync::Arc<rustc_data_structures[72a506bfd180f26d]::jobserver::Proxy>, &std[70918e54a4c01c2f]::sync::once_lock::OnceLock<rustc_middle[32956c401cc86bea]::ty::context::GlobalCtxt>, &rustc_data_structures[72a506bfd180f26d]::sync::worker_local::WorkerLocal<rustc_middle[32956c401cc86bea]::arena::Arena>, &rustc_data_structures[72a506bfd180f26d]::sync::worker_local::WorkerLocal<rustc_hir[ae1e2e3a16b9b894]::Arena>, rustc_driver_impl[7b62307e987fdf9b]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
39: 0x7ff237b3da29 - rustc_interface[ee8ca9de4d50d0ec]::interface::run_compiler::<(), rustc_driver_impl[7b62307e987fdf9b]::run_compiler::{closure#0}>::{closure#1}
40: 0x7ff237839440 - std[70918e54a4c01c2f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[ee8ca9de4d50d0ec]::util::run_in_thread_with_globals<rustc_interface[ee8ca9de4d50d0ec]::util::run_in_thread_pool_with_globals<rustc_interface[ee8ca9de4d50d0ec]::interface::run_compiler<(), rustc_driver_impl[7b62307e987fdf9b]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
41: 0x7ff237839124 - <<std[70918e54a4c01c2f]::thread::Builder>::spawn_unchecked_<rustc_interface[ee8ca9de4d50d0ec]::util::run_in_thread_with_globals<rustc_interface[ee8ca9de4d50d0ec]::util::run_in_thread_pool_with_globals<rustc_interface[ee8ca9de4d50d0ec]::interface::run_compiler<(), rustc_driver_impl[7b62307e987fdf9b]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[6e2b95161510a05c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
42: 0x7ff237837aaf - std::sys::thread::unix::Thread::new::thread_start::hd76d5080be86b58b
43: 0x7ff2312969cb - <unknown>
44: 0x7ff23131aa0c - <unknown>
45: 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 1.93.0-nightly (843f8ce2e 2025-11-07) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [typeck] type-checking `main`
#1 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 1 previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0423`.