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ICE: must_produce_diag: trimmed_def_paths called but no diagnostics emitted #121774
Description
Input:
// lib.rs
#[must_use]
fn f() {}
pub fn g() {
f();
}rustc lib.rs -Dunused_must_use -Awarnings --cap-lints=warn --crate-type=lib
thread 'rustc' panicked at compiler/rustc_errors/src/lib.rs:572:17:
must_produce_diag: trimmed_def_paths called but no diagnostics emitted; use `DelayDm` for lints or `with_no_trimmed_paths` for debugging
stack backtrace:
0: 0x7f268108cdb6 - std::backtrace_rs::backtrace::libunwind::trace::h341f79bffd736d88
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
1: 0x7f268108cdb6 - std::backtrace_rs::backtrace::trace_unsynchronized::h699175639bf0c53f
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f268108cdb6 - std::sys_common::backtrace::_print_fmt::he64554b6b8851325
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys_common/backtrace.rs:68:5
3: 0x7f268108cdb6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6f1d81aff3ba783c
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7f26810ddd3c - core::fmt::rt::Argument::fmt::ha094c70f8a774861
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/core/src/fmt/rt.rs:142:9
5: 0x7f26810ddd3c - core::fmt::write::h7f13c4b287d5364f
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/core/src/fmt/mod.rs:1120:17
6: 0x7f268108163f - std::io::Write::write_fmt::h33c62cb7f1d9ccd2
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/io/mod.rs:1846:15
7: 0x7f268108cb64 - std::sys_common::backtrace::_print::h5a328173cecd6a17
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7f268108cb64 - std::sys_common::backtrace::print::h40f459d9b04f57e7
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7f268108f8ab - std::panicking::default_hook::{{closure}}::hd2a3df71af903bed
10: 0x7f268108f5f9 - std::panicking::default_hook::ha092baec2054d09a
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/panicking.rs:292:9
11: 0x7f267dc9bcbc - std[aeaa4a650f96ca4f]::panicking::update_hook::<alloc[4c4126b71025da3b]::boxed::Box<rustc_driver_impl[2ad8c6e0ef02d37]::install_ice_hook::{closure#0}>>::{closure#0}
12: 0x7f2681090010 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he192bb5ab07c6e66
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/alloc/src/boxed.rs:2030:9
13: 0x7f2681090010 - std::panicking::rust_panic_with_hook::h46c6fddd63cff830
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/panicking.rs:783:13
14: 0x7f268108fd19 - std::panicking::begin_panic_handler::{{closure}}::h8abc72b89d98e75c
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/panicking.rs:649:13
15: 0x7f268108d296 - std::sys_common::backtrace::__rust_end_short_backtrace::h1eafc870bd031abe
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys_common/backtrace.rs:171:18
16: 0x7f268108fa84 - rust_begin_unwind
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/panicking.rs:645:5
17: 0x7f26810da255 - core::panicking::panic_fmt::hd079a8afc216673e
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/core/src/panicking.rs:72:14
18: 0x7f26805d5ea2 - <rustc_errors[8f2d5467e268fcd1]::DiagCtxtInner as core[ceaa87f59aeb8bba]::ops::drop::Drop>::drop.cold.0
19: 0x7f267fb5719c - core[ceaa87f59aeb8bba]::ptr::drop_in_place::<rustc_errors[8f2d5467e268fcd1]::DiagCtxt>
20: 0x7f267fdee217 - core[ceaa87f59aeb8bba]::ptr::drop_in_place::<rustc_session[6420a5b3483699f8]::parse::ParseSess>
21: 0x7f267fdee7f1 - core[ceaa87f59aeb8bba]::ptr::drop_in_place::<rustc_interface[91b806f92bb77cda]::interface::Compiler>
22: 0x7f267fd3e672 - rustc_interface[91b806f92bb77cda]::interface::run_compiler::<core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>, rustc_driver_impl[2ad8c6e0ef02d37]::run_compiler::{closure#0}>::{closure#0}
23: 0x7f267ffddd05 - std[aeaa4a650f96ca4f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[91b806f92bb77cda]::util::run_in_thread_with_globals<rustc_interface[91b806f92bb77cda]::util::run_in_thread_pool_with_globals<rustc_interface[91b806f92bb77cda]::interface::run_compiler<core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>, rustc_driver_impl[2ad8c6e0ef02d37]::run_compiler::{closure#0}>::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>
24: 0x7f267ffddb32 - <<std[aeaa4a650f96ca4f]::thread::Builder>::spawn_unchecked_<rustc_interface[91b806f92bb77cda]::util::run_in_thread_with_globals<rustc_interface[91b806f92bb77cda]::util::run_in_thread_pool_with_globals<rustc_interface[91b806f92bb77cda]::interface::run_compiler<core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>, rustc_driver_impl[2ad8c6e0ef02d37]::run_compiler::{closure#0}>::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ceaa87f59aeb8bba]::result::Result<(), rustc_span[ac3b12a2af12cb0d]::ErrorGuaranteed>>::{closure#1} as core[ceaa87f59aeb8bba]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
25: 0x7f26810999e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4c4227d670230628
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/alloc/src/boxed.rs:2016:9
26: 0x7f26810999e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4bc52f0323c8ae82
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/alloc/src/boxed.rs:2016:9
27: 0x7f26810999e5 - std::sys::pal::unix::thread::Thread::new::thread_start::hd34fbf5607308b31
at /rustc/c475e2303b551d726307c646181e0677af1e0069/library/std/src/sys/pal/unix/thread.rs:108:17
28: 0x7f267aa94ac3 - start_thread
at ./nptl/pthread_create.c:442:8
29: 0x7f267ab26850 - __GI___clone3
at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
30: 0x0 - <unknown>$ rustc --version --verbose
rustc 1.78.0-nightly (c475e2303 2024-02-28)
binary: rustc
commit-hash: c475e2303b551d726307c646181e0677af1e0069
commit-date: 2024-02-28
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0
Activity
dtolnay commentedon Feb 29, 2024
Bisects to Rust 1.55.0, and nightly-2021-07-20. In older stable and nightly releases, this compiles successfully.
apiraino commentedon Feb 29, 2024
WG-prioritization assigning priority (Zulip discussion).
@rustbot label -I-prioritize +P-medium
apiraino commentedon Feb 29, 2024
bisection points to rollup 27f5d83
If I had to guess, I'd say that #93590 looks like the one. It's the only one in the rollup touching diagnostic code. Possibly my reasoning is off (pls correct me).
dtolnay commentedon Feb 29, 2024
Something went wrong with your bisect, as 27f5d83 is from 2022-02-02, whereas this ICE is present in nightly-2021-07-20.
#86970 looks the most likely to me.
Noratrieb commentedon Feb 29, 2024
Either way, this is probably easier to debug from scratch instead of digging around commits.
Previous issue with this ICE message should reveal information on how to fix these issues, which arise from eagerly formatting paths in lints instead of only when they're emitted.
chenyukang commentedon Mar 2, 2024
Fix for a similar issue : #108162
Rollup merge of rust-lang#122578 - jieyouxu:guard-decorate, r=fee1-dead
Unrolled build for rust-lang#122578