Do not enable split debuginfo for windows-gnu by mati865 · Pull Request #152870 · rust-lang/rust

mati865 · 2026-02-19T21:38:33Z

Because rustc doesn't handle split debuginfo for these targets, enabling that option causes them to be missing some of the debuginfo.

rustbot · 2026-02-19T21:38:37Z

r? @Mark-Simulacrum

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Owners of files modified in this PR: bootstrap
bootstrap expanded to 6 candidates
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mati865 · 2026-02-19T21:42:27Z

To avoid ballooning commit message, I'm posting the backtraces of i686-pc-windows-gnu, x86_64-pc-windows-gnu and x86_64-pc-windows-gnullvm targets here.

Before this PR:

Details

❯ RUST_BACKTRACE=full PATH=$PATH:/mingw32/bin target/i686-pc-windows-gnu/debug/hello

thread 'main' (23732) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:   0xa505ff - core[5cafb38444544012]::fmt::write
                       at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   1:   0xa282e4 - <std[ef01411f5665c104]::sys::stdio::windows::Stderr as std[ef01411f5665c104]::io::Write>::write_fmt
                       at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   2:   0x9e9cd1 - std[ef01411f5665c104]::panicking::default_hook::{closure#0}
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   3:   0xa09f7f - std[ef01411f5665c104]::panicking::default_hook
                       at G:\Projects\rust\library\std\src\panicking.rs:319:9
   4:   0xa0a269 - std[ef01411f5665c104]::panicking::panic_with_hook
                       at G:\Projects\rust\library\std\src\panicking.rs:825:13
   5:   0x9e8ae6 - std[ef01411f5665c104]::panicking::begin_panic::<&str>::{closure#0}
                       at G:\Projects\rust\library\std\src\panicking.rs:762:9
   6:   0x9dc78b - std[ef01411f5665c104]::sys::backtrace::__rust_end_short_backtrace::<std[ef01411f5665c104]::panicking::begin_panic<&str>::{closure#0}, !>
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
   7:   0x9dc77a - std[ef01411f5665c104]::panicking::begin_panic::<&str>
                       at G:\Projects\rust\library\std\src\panicking.rs:761:5
   8:   0x9d17d6 - hello[96e289bff0c57e4e]::main::{closure#0}
                       at E:\tmp\hello\src\main.rs:5:13
   9:   0x9d1621 - std[ef01411f5665c104]::panicking::catch_unwind::do_call::<hello[96e289bff0c57e4e]::main::{closure#0}, ()>
                       at G:\Projects\rust\library\std\src\panicking.rs:581:40
  10:   0x9d177c - ___rust_try
  11:   0x9d172b - std[ef01411f5665c104]::panicking::catch_unwind::<(), hello[96e289bff0c57e4e]::main::{closure#0}>
                       at G:\Projects\rust\library\std\src\panicking.rs:544:19
  12:   0x9d172b - std[ef01411f5665c104]::panic::catch_unwind::<hello[96e289bff0c57e4e]::main::{closure#0}, ()>
                       at G:\Projects\rust\library\std\src\panic.rs:359:14
  13:   0x9d1c3b - hello[96e289bff0c57e4e]::main
                       at E:\tmp\hello\src\main.rs:4:9
  14:   0x9d19a9 - <fn() as core[5cafb38444544012]::ops::function::FnOnce<()>>::call_once
                       at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  15:   0x9d1a01 - std[ef01411f5665c104]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  16:   0x9d16e3 - std[ef01411f5665c104]::rt::lang_start::<()>::{closure#0}
                       at G:\Projects\rust\library\std\src\rt.rs:206:18
  17:   0xa08681 - std[ef01411f5665c104]::rt::lang_start_internal
                       at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  18:   0x9d16bb - std[ef01411f5665c104]::rt::lang_start::<()>
                       at G:\Projects\rust\library\std\src\rt.rs:205:5
  19:   0x9d1d0e - _main
  20:   0x9d10fd - __tmainCRTStartup
                       at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  21: 0x74af5d49 - <unknown>
  22: 0x76fdd83b - <unknown>
  23: 0x76fdd7c1 - <unknown>
Err(Any { .. })

❯ RUST_BACKTRACE=full target/x86_64-pc-windows-gnu/debug/hello

thread 'main' (23732) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:     0x7ff600cf89cf - <<std[d4f876d29f390f94]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[64193fd96b05540e]::fmt::Display>::fmt
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\win64.rs:85:14
   1:     0x7ff600d34291 - core[64193fd96b05540e]::fmt::write
                               at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   2:     0x7ff600d08a12 - <std[d4f876d29f390f94]::sys::stdio::windows::Stderr as std[d4f876d29f390f94]::io::Write>::write_fmt
                               at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   3:     0x7ff600cc7c81 - std[d4f876d29f390f94]::panicking::default_hook::{closure#0}
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   4:     0x7ff600ce8a3a - std[d4f876d29f390f94]::panicking::default_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:319:9
   5:     0x7ff600ce8d6a - std[d4f876d29f390f94]::panicking::panic_with_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:825:13
   6:     0x7ff600cc6bbd - std[d4f876d29f390f94]::panicking::begin_panic::<&str>::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:762:9
   7:     0x7ff600cbde6f - std[d4f876d29f390f94]::sys::backtrace::__rust_end_short_backtrace::<std[d4f876d29f390f94]::panicking::begin_panic<&str>::{closure#0}, !>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
   8:     0x7ff600cbace2 - std[d4f876d29f390f94]::panicking::begin_panic::<&str>
                               at G:\Projects\rust\library\std\src\panicking.rs:761:5
   9:     0x7ff600cb156c - hello[adf1cd9dd2e96171]::main::{closure#0}
                               at E:\tmp\hello\src\main.rs:5:13
  10:     0x7ff600cb1633 - std[d4f876d29f390f94]::panicking::catch_unwind::do_call::<hello[adf1cd9dd2e96171]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  11:     0x7ff600cb1528 - __rust_try
  12:     0x7ff600cb14b6 - std[d4f876d29f390f94]::panicking::catch_unwind::<(), hello[adf1cd9dd2e96171]::main::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  13:     0x7ff600cb14b6 - std[d4f876d29f390f94]::panic::catch_unwind::<hello[adf1cd9dd2e96171]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  14:     0x7ff600cb1889 - hello[adf1cd9dd2e96171]::main
                               at E:\tmp\hello\src\main.rs:4:9
  15:     0x7ff600cb1c2b - <fn() as core[64193fd96b05540e]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  16:     0x7ff600cb19ae - std[d4f876d29f390f94]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  17:     0x7ff600cb17c1 - std[d4f876d29f390f94]::rt::lang_start::<()>::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:206:18
  18:     0x7ff600ce6dc2 - std[d4f876d29f390f94]::rt::lang_start_internal
                               at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  19:     0x7ff600cb17aa - std[d4f876d29f390f94]::rt::lang_start::<()>
                               at G:\Projects\rust\library\std\src\rt.rs:205:5
  20:     0x7ff600cb194f - main
  21:     0x7ff600cb10d9 - __tmainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  22:     0x7ff600cb1456 - mainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:130:9
  23:     0x7fff60d6e8d7 - <unknown>
  24:     0x7fff6266c40c - <unknown>
Err(Any { .. })

❯ RUST_BACKTRACE=full target/x86_64-pc-windows-gnullvm/debug/hello

thread 'main' (660) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:     0x7ff6237a3e0f - <<std[6d0b14057f6c718b]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[70ad8383decbc5af]::fmt::Display>::fmt
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\win64.rs:85:14
   1:     0x7ff6237af3b1 - core[70ad8383decbc5af]::fmt::write
                               at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   2:     0x7ff6237a6e12 - <std[6d0b14057f6c718b]::sys::stdio::windows::Stderr as std[6d0b14057f6c718b]::io::Write>::write_fmt
                               at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   3:     0x7ff6237922d6 - std[6d0b14057f6c718b]::panicking::default_hook::{closure#0}
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   4:     0x7ff62379d0c1 - std[6d0b14057f6c718b]::panicking::default_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:319:9
   5:     0x7ff62379d27a - std[6d0b14057f6c718b]::panicking::panic_with_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:825:13
   6:     0x7ff62379172d - std[6d0b14057f6c718b]::panicking::begin_panic::<&str>::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:762:9
   7:     0x7ff6237879bf - std[6d0b14057f6c718b]::sys::backtrace::__rust_end_short_backtrace::<std[6d0b14057f6c718b]::panicking::begin_panic<&str>::{closure#0}, !>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
   8:     0x7ff623786fe2 - std[6d0b14057f6c718b]::panicking::begin_panic::<&str>
                               at G:\Projects\rust\library\std\src\panicking.rs:761:5
   9:     0x7ff62378197c - hello[3c5525e93ad5fb39]::main::{closure#0}
                               at E:\tmp\hello\src\main.rs:5:13
  10:     0x7ff623781493 - std[6d0b14057f6c718b]::panicking::catch_unwind::do_call::<hello[3c5525e93ad5fb39]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  11:     0x7ff623781a18 - __rust_try
  12:     0x7ff6237819a6 - std[6d0b14057f6c718b]::panicking::catch_unwind::<(), hello[3c5525e93ad5fb39]::main::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  13:     0x7ff6237819a6 - std[6d0b14057f6c718b]::panic::catch_unwind::<hello[3c5525e93ad5fb39]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  14:     0x7ff623781829 - hello[3c5525e93ad5fb39]::main
                               at E:\tmp\hello\src\main.rs:4:9
  15:     0x7ff62378171b - <fn() as core[70ad8383decbc5af]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  16:     0x7ff623781bce - std[6d0b14057f6c718b]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  17:     0x7ff623781b41 - std[6d0b14057f6c718b]::rt::lang_start::<()>::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:206:18
  18:     0x7ff62379c6dc - std[6d0b14057f6c718b]::rt::lang_start_internal
                               at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  19:     0x7ff623781b2a - std[6d0b14057f6c718b]::rt::lang_start::<()>
                               at G:\Projects\rust\library\std\src\rt.rs:205:5
  20:     0x7ff6237818ef - main
  21:     0x7ff6237810fe - __tmainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  22:     0x7ff6237813e6 - mainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:130:9
  23:     0x7fff60d6e8d7 - <unknown>
  24:     0x7fff6266c40c - <unknown>
Err(Any { .. })

With this PR:

Details

❯ RUST_BACKTRACE=full target/i686-pc-windows-gnu/debug/hello

thread 'main' (37308) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:   0x6805ff - <core[5cafb38444544012]::fmt::rt::Argument>::fmt
                       at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   1:   0x6805ff - core[5cafb38444544012]::fmt::write
                       at G:\Projects\rust\library\core\src\fmt\mod.rs:1686:22
   2:   0x6582e4 - std[ef01411f5665c104]::io::default_write_fmt::<std[ef01411f5665c104]::sys::stdio::windows::Stderr>
                       at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   3:   0x6582e4 - <std[ef01411f5665c104]::sys::stdio::windows::Stderr as std[ef01411f5665c104]::io::Write>::write_fmt
                       at G:\Projects\rust\library\std\src\io\mod.rs:1994:13
   4:   0x619cd1 - <std[ef01411f5665c104]::sys::backtrace::BacktraceLock>::print
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   5:   0x619cd1 - std[ef01411f5665c104]::panicking::default_hook::{closure#0}
                       at G:\Projects\rust\library\std\src\panicking.rs:292:27
   6:   0x639f7f - std[ef01411f5665c104]::panicking::default_hook
                       at G:\Projects\rust\library\std\src\panicking.rs:319:9
   7:   0x63a269 - std[ef01411f5665c104]::panicking::panic_with_hook
                       at G:\Projects\rust\library\std\src\panicking.rs:825:13
   8:   0x618ae6 - std[ef01411f5665c104]::panicking::begin_panic::<&str>::{closure#0}
                       at G:\Projects\rust\library\std\src\panicking.rs:762:9
   9:   0x60c78b - std[ef01411f5665c104]::sys::backtrace::__rust_end_short_backtrace::<std[ef01411f5665c104]::panicking::begin_panic<&str>::{closure#0}, !>
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
  10:   0x60c77a - std[ef01411f5665c104]::panicking::begin_panic::<&str>
                       at G:\Projects\rust\library\std\src\panicking.rs:761:5
  11:   0x6017d6 - hello[96e289bff0c57e4e]::main::{closure#0}
                       at E:\tmp\hello\src\main.rs:5:13
  12:   0x601621 - std[ef01411f5665c104]::panicking::catch_unwind::do_call::<hello[96e289bff0c57e4e]::main::{closure#0}, ()>
                       at G:\Projects\rust\library\std\src\panicking.rs:581:40
  13:   0x60177c - ___rust_try
  14:   0x60172b - std[ef01411f5665c104]::panicking::catch_unwind::<(), hello[96e289bff0c57e4e]::main::{closure#0}>
                       at G:\Projects\rust\library\std\src\panicking.rs:544:19
  15:   0x60172b - std[ef01411f5665c104]::panic::catch_unwind::<hello[96e289bff0c57e4e]::main::{closure#0}, ()>
                       at G:\Projects\rust\library\std\src\panic.rs:359:14
  16:   0x601c3b - hello[96e289bff0c57e4e]::main
                       at E:\tmp\hello\src\main.rs:4:9
  17:   0x6019a9 - <fn() as core[5cafb38444544012]::ops::function::FnOnce<()>>::call_once
                       at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  18:   0x601a01 - std[ef01411f5665c104]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                       at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  19:   0x6016e3 - std[ef01411f5665c104]::rt::lang_start::<()>::{closure#0}
                       at G:\Projects\rust\library\std\src\rt.rs:206:18
  20:   0x638681 - <&dyn core[5cafb38444544012]::ops::function::Fn<(), Output = i32> + core[5cafb38444544012]::marker::Sync + core[5cafb38444544012]::panic::unwind_safe::RefUnwindSafe as core[5cafb38444544012]::ops::function::FnOnce<()>>::call_once
                       at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  21:   0x638681 - std[ef01411f5665c104]::panicking::catch_unwind::do_call::<&dyn core[5cafb38444544012]::ops::function::Fn<(), Output = i32> + core[5cafb38444544012]::marker::Sync + core[5cafb38444544012]::panic::unwind_safe::RefUnwindSafe, i32>
                       at G:\Projects\rust\library\std\src\panicking.rs:581:40
  22:   0x638681 - std[ef01411f5665c104]::panicking::catch_unwind::<i32, &dyn core[5cafb38444544012]::ops::function::Fn<(), Output = i32> + core[5cafb38444544012]::marker::Sync + core[5cafb38444544012]::panic::unwind_safe::RefUnwindSafe>
                       at G:\Projects\rust\library\std\src\panicking.rs:544:19
  23:   0x638681 - std[ef01411f5665c104]::panic::catch_unwind::<&dyn core[5cafb38444544012]::ops::function::Fn<(), Output = i32> + core[5cafb38444544012]::marker::Sync + core[5cafb38444544012]::panic::unwind_safe::RefUnwindSafe, i32>
                       at G:\Projects\rust\library\std\src\panic.rs:359:14
  24:   0x638681 - std[ef01411f5665c104]::rt::lang_start_internal::{closure#0}
                       at G:\Projects\rust\library\std\src\rt.rs:175:24
  25:   0x638681 - std[ef01411f5665c104]::panicking::catch_unwind::do_call::<std[ef01411f5665c104]::rt::lang_start_internal::{closure#0}, isize>
                       at G:\Projects\rust\library\std\src\panicking.rs:581:40
  26:   0x638681 - std[ef01411f5665c104]::panicking::catch_unwind::<isize, std[ef01411f5665c104]::rt::lang_start_internal::{closure#0}>
                       at G:\Projects\rust\library\std\src\panicking.rs:544:19
  27:   0x638681 - std[ef01411f5665c104]::panic::catch_unwind::<std[ef01411f5665c104]::rt::lang_start_internal::{closure#0}, isize>
                       at G:\Projects\rust\library\std\src\panic.rs:359:14
  28:   0x638681 - std[ef01411f5665c104]::rt::lang_start_internal
                       at G:\Projects\rust\library\std\src\rt.rs:171:5
  29:   0x6016bb - std[ef01411f5665c104]::rt::lang_start::<()>
                       at G:\Projects\rust\library\std\src\rt.rs:205:5
  30:   0x601d0e - _main
  31:   0x6010fd - __tmainCRTStartup
                       at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  32: 0x74af5d49 - <unknown>
  33: 0x76fdd83b - <unknown>
  34: 0x76fdd7c1 - <unknown>
Err(Any { .. })

❯ RUST_BACKTRACE=full target/x86_64-pc-windows-gnu/debug/hello

thread 'main' (37624) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:     0x7ff611e989cf - std[d4f876d29f390f94]::backtrace_rs::backtrace::win64::trace
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\win64.rs:85:14
   1:     0x7ff611e989cf - std[d4f876d29f390f94]::backtrace_rs::backtrace::trace_unsynchronized::<std[d4f876d29f390f94]::sys::backtrace::_print_fmt::{closure#1}>
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\mod.rs:66:14
   2:     0x7ff611e989cf - std[d4f876d29f390f94]::sys::backtrace::_print_fmt
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:74:9
   3:     0x7ff611e989cf - <<std[d4f876d29f390f94]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[64193fd96b05540e]::fmt::Display>::fmt
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:44:26
   4:     0x7ff611ed4291 - <core[64193fd96b05540e]::fmt::rt::Argument>::fmt
                               at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   5:     0x7ff611ed4291 - core[64193fd96b05540e]::fmt::write
   6:     0x7ff611ea8a12 - std[d4f876d29f390f94]::io::default_write_fmt::<std[d4f876d29f390f94]::sys::stdio::windows::Stderr>
                               at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   7:     0x7ff611ea8a12 - <std[d4f876d29f390f94]::sys::stdio::windows::Stderr as std[d4f876d29f390f94]::io::Write>::write_fmt
                               at G:\Projects\rust\library\std\src\io\mod.rs:1994:13
   8:     0x7ff611e67c81 - <std[d4f876d29f390f94]::sys::backtrace::BacktraceLock>::print
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   9:     0x7ff611e67c81 - std[d4f876d29f390f94]::panicking::default_hook::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:292:27
  10:     0x7ff611e88a3a - std[d4f876d29f390f94]::panicking::default_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:319:9
  11:     0x7ff611e88d6a - std[d4f876d29f390f94]::panicking::panic_with_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:825:13
  12:     0x7ff611e66bbd - std[d4f876d29f390f94]::panicking::begin_panic::<&str>::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:762:9
  13:     0x7ff611e5de6f - std[d4f876d29f390f94]::sys::backtrace::__rust_end_short_backtrace::<std[d4f876d29f390f94]::panicking::begin_panic<&str>::{closure#0}, !>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
  14:     0x7ff611e5ace2 - std[d4f876d29f390f94]::panicking::begin_panic::<&str>
                               at G:\Projects\rust\library\std\src\panicking.rs:761:5
  15:     0x7ff611e5156c - hello[adf1cd9dd2e96171]::main::{closure#0}
                               at E:\tmp\hello\src\main.rs:5:13
  16:     0x7ff611e51633 - std[d4f876d29f390f94]::panicking::catch_unwind::do_call::<hello[adf1cd9dd2e96171]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  17:     0x7ff611e51528 - __rust_try
  18:     0x7ff611e514b6 - std[d4f876d29f390f94]::panicking::catch_unwind::<(), hello[adf1cd9dd2e96171]::main::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  19:     0x7ff611e514b6 - std[d4f876d29f390f94]::panic::catch_unwind::<hello[adf1cd9dd2e96171]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  20:     0x7ff611e51889 - hello[adf1cd9dd2e96171]::main
                               at E:\tmp\hello\src\main.rs:4:9
  21:     0x7ff611e51c2b - <fn() as core[64193fd96b05540e]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  22:     0x7ff611e519ae - std[d4f876d29f390f94]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  23:     0x7ff611e517c1 - std[d4f876d29f390f94]::rt::lang_start::<()>::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:206:18
  24:     0x7ff611e86dc2 - <&dyn core[64193fd96b05540e]::ops::function::Fn<(), Output = i32> + core[64193fd96b05540e]::marker::Sync + core[64193fd96b05540e]::panic::unwind_safe::RefUnwindSafe as core[64193fd96b05540e]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  25:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panicking::catch_unwind::do_call::<&dyn core[64193fd96b05540e]::ops::function::Fn<(), Output = i32> + core[64193fd96b05540e]::marker::Sync + core[64193fd96b05540e]::panic::unwind_safe::RefUnwindSafe, i32>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  26:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panicking::catch_unwind::<i32, &dyn core[64193fd96b05540e]::ops::function::Fn<(), Output = i32> + core[64193fd96b05540e]::marker::Sync + core[64193fd96b05540e]::panic::unwind_safe::RefUnwindSafe>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  27:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panic::catch_unwind::<&dyn core[64193fd96b05540e]::ops::function::Fn<(), Output = i32> + core[64193fd96b05540e]::marker::Sync + core[64193fd96b05540e]::panic::unwind_safe::RefUnwindSafe, i32>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  28:     0x7ff611e86dc2 - std[d4f876d29f390f94]::rt::lang_start_internal::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:175:24
  29:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panicking::catch_unwind::do_call::<std[d4f876d29f390f94]::rt::lang_start_internal::{closure#0}, isize>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  30:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panicking::catch_unwind::<isize, std[d4f876d29f390f94]::rt::lang_start_internal::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  31:     0x7ff611e86dc2 - std[d4f876d29f390f94]::panic::catch_unwind::<std[d4f876d29f390f94]::rt::lang_start_internal::{closure#0}, isize>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  32:     0x7ff611e86dc2 - std[d4f876d29f390f94]::rt::lang_start_internal
                               at G:\Projects\rust\library\std\src\rt.rs:171:5
  33:     0x7ff611e517aa - std[d4f876d29f390f94]::rt::lang_start::<()>
                               at G:\Projects\rust\library\std\src\rt.rs:205:5
  34:     0x7ff611e5194f - main
  35:     0x7ff611e510d9 - __tmainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  36:     0x7ff611e51456 - mainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:130:9
  37:     0x7fff60d6e8d7 - <unknown>
  38:     0x7fff6266c40c - <unknown>
Err(Any { .. })

❯ RUST_BACKTRACE=full target/x86_64-pc-windows-gnullvm/debug/hello

thread 'main' (11672) panicked at src\main.rs:5:13:
Hello, world!
stack backtrace:
   0:     0x7ff6cfc33e0f - std[6d0b14057f6c718b]::backtrace_rs::backtrace::win64::trace
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\win64.rs:85:14
   1:     0x7ff6cfc33e0f - std[6d0b14057f6c718b]::backtrace_rs::backtrace::trace_unsynchronized::<std[6d0b14057f6c718b]::sys::backtrace::_print_fmt::{closure#1}>
                               at G:\Projects\rust\library\std\src\..\..\backtrace\src\backtrace\mod.rs:66:14
   2:     0x7ff6cfc33e0f - std[6d0b14057f6c718b]::sys::backtrace::_print_fmt
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:74:9
   3:     0x7ff6cfc33e0f - <<std[6d0b14057f6c718b]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[70ad8383decbc5af]::fmt::Display>::fmt
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:44:26
   4:     0x7ff6cfc3f3b1 - <core[70ad8383decbc5af]::fmt::rt::Argument>::fmt
                               at G:\Projects\rust\library\core\src\fmt\rt.rs:152:76
   5:     0x7ff6cfc3f3b1 - core[70ad8383decbc5af]::fmt::write
   6:     0x7ff6cfc36e12 - std[6d0b14057f6c718b]::io::default_write_fmt::<std[6d0b14057f6c718b]::sys::stdio::windows::Stderr>
                               at G:\Projects\rust\library\std\src\io\mod.rs:639:11
   7:     0x7ff6cfc36e12 - <std[6d0b14057f6c718b]::sys::stdio::windows::Stderr as std[6d0b14057f6c718b]::io::Write>::write_fmt
                               at G:\Projects\rust\library\std\src\io\mod.rs:1994:13
   8:     0x7ff6cfc222d6 - <std[6d0b14057f6c718b]::sys::backtrace::BacktraceLock>::print
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:47:9
   9:     0x7ff6cfc222d6 - std[6d0b14057f6c718b]::panicking::default_hook::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:292:27
  10:     0x7ff6cfc2d0c1 - std[6d0b14057f6c718b]::panicking::default_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:319:9
  11:     0x7ff6cfc2d27a - std[6d0b14057f6c718b]::panicking::panic_with_hook
                               at G:\Projects\rust\library\std\src\panicking.rs:825:13
  12:     0x7ff6cfc2172d - std[6d0b14057f6c718b]::panicking::begin_panic::<&str>::{closure#0}
                               at G:\Projects\rust\library\std\src\panicking.rs:762:9
  13:     0x7ff6cfc179bf - std[6d0b14057f6c718b]::sys::backtrace::__rust_end_short_backtrace::<std[6d0b14057f6c718b]::panicking::begin_panic<&str>::{closure#0}, !>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:182:18
  14:     0x7ff6cfc16fe2 - std[6d0b14057f6c718b]::panicking::begin_panic::<&str>
                               at G:\Projects\rust\library\std\src\panicking.rs:761:5
  15:     0x7ff6cfc1197c - hello[3c5525e93ad5fb39]::main::{closure#0}
                               at E:\tmp\hello\src\main.rs:5:13
  16:     0x7ff6cfc11493 - std[6d0b14057f6c718b]::panicking::catch_unwind::do_call::<hello[3c5525e93ad5fb39]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  17:     0x7ff6cfc11a18 - __rust_try
  18:     0x7ff6cfc119a6 - std[6d0b14057f6c718b]::panicking::catch_unwind::<(), hello[3c5525e93ad5fb39]::main::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  19:     0x7ff6cfc119a6 - std[6d0b14057f6c718b]::panic::catch_unwind::<hello[3c5525e93ad5fb39]::main::{closure#0}, ()>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  20:     0x7ff6cfc11829 - hello[3c5525e93ad5fb39]::main
                               at E:\tmp\hello\src\main.rs:4:9
  21:     0x7ff6cfc1171b - <fn() as core[70ad8383decbc5af]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:250:5
  22:     0x7ff6cfc11bce - std[6d0b14057f6c718b]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
                               at G:\Projects\rust\library\std\src\sys\backtrace.rs:166:18
  23:     0x7ff6cfc11b41 - std[6d0b14057f6c718b]::rt::lang_start::<()>::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:206:18
  24:     0x7ff6cfc2c6dc - <&dyn core[70ad8383decbc5af]::ops::function::Fn<(), Output = i32> + core[70ad8383decbc5af]::marker::Sync + core[70ad8383decbc5af]::panic::unwind_safe::RefUnwindSafe as core[70ad8383decbc5af]::ops::function::FnOnce<()>>::call_once
                               at G:\Projects\rust\library\core\src\ops\function.rs:287:21
  25:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panicking::catch_unwind::do_call::<&dyn core[70ad8383decbc5af]::ops::function::Fn<(), Output = i32> + core[70ad8383decbc5af]::marker::Sync + core[70ad8383decbc5af]::panic::unwind_safe::RefUnwindSafe, i32>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  26:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panicking::catch_unwind::<i32, &dyn core[70ad8383decbc5af]::ops::function::Fn<(), Output = i32> + core[70ad8383decbc5af]::marker::Sync + core[70ad8383decbc5af]::panic::unwind_safe::RefUnwindSafe>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  27:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panic::catch_unwind::<&dyn core[70ad8383decbc5af]::ops::function::Fn<(), Output = i32> + core[70ad8383decbc5af]::marker::Sync + core[70ad8383decbc5af]::panic::unwind_safe::RefUnwindSafe, i32>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  28:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::rt::lang_start_internal::{closure#0}
                               at G:\Projects\rust\library\std\src\rt.rs:175:24
  29:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panicking::catch_unwind::do_call::<std[6d0b14057f6c718b]::rt::lang_start_internal::{closure#0}, isize>
                               at G:\Projects\rust\library\std\src\panicking.rs:581:40
  30:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panicking::catch_unwind::<isize, std[6d0b14057f6c718b]::rt::lang_start_internal::{closure#0}>
                               at G:\Projects\rust\library\std\src\panicking.rs:544:19
  31:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::panic::catch_unwind::<std[6d0b14057f6c718b]::rt::lang_start_internal::{closure#0}, isize>
                               at G:\Projects\rust\library\std\src\panic.rs:359:14
  32:     0x7ff6cfc2c6dc - std[6d0b14057f6c718b]::rt::lang_start_internal
                               at G:\Projects\rust\library\std\src\rt.rs:171:5
  33:     0x7ff6cfc11b2a - std[6d0b14057f6c718b]::rt::lang_start::<()>
                               at G:\Projects\rust\library\std\src\rt.rs:205:5
  34:     0x7ff6cfc118ef - main
  35:     0x7ff6cfc110fe - __tmainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:261:11
  36:     0x7ff6cfc113e6 - mainCRTStartup
                               at D:/W/B/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:130:9
  37:     0x7fff60d6e8d7 - <unknown>
  38:     0x7fff6266c40c - <unknown>
Err(Any { .. })

Tested code:

Details

❯ bat src/main.rs -p
fn main() {
    println!(
        "{:?}",
        std::panic::catch_unwind(|| {
            panic!("Hello, world!");
        })
    );
}

I first noticed the problem when trying to debug a different issue, and I ran GNU objdump:

Details

❯ /ucrt64/bin/objdump -Wi target/x86_64-pc-windows-gnullvm/debug/hello.exe | bat
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\compiler_builtins-7aa44901764461d6.compiler_builtins.9c689dc96c55cd77-cgu.107.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\compiler_builtins-7aa44901764461d6.compiler_builtins.9c689dc96c55cd77-cgu.120.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\compiler_builtins-7aa44901764461d6.compiler_builtins.9c689dc96c55cd77-cgu.213.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\memchr-6b5548a1ef3c9e90.memchr.eca781d8a5e058-cgu.0.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\core-d846126f27a3c480.core.70ad8383decbc5af-cgu.0.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\alloc-2bddaed94656a80c.alloc.75bda1cafdd8463f-cgu.0.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\panic_unwind-49ad9a1d539f0a56.panic_unwind.9f98ee378e4e25cc-cgu.0.rcgu.dwo
G:\msys64\ucrt64\bin\objdump.exe: Warning: Unable to load dwo file: G:\Projects\rust\build\x86_64-pc-windows-gnullvm\stage1-std\x86_64-pc-windows-gnullvm\dist\deps\std-3f152964daca08de.std.6d0b14057f6c718b-cgu.0.rcgu.dwo

mati865 · 2026-02-19T21:45:31Z

Just in case, let's see if the CI likes it:

@bors try jobs=dist-aarch64-llvm-mingw,dist-i686-mingw,dist-x86_64-llvm-mingw,dist-x86_64-mingw,x86_64-mingw-1,x86_64-mingw-2

…tstrap, r=<try> Do not enable split debuginfo for windows-gnu try-job: dist-aarch64-llvm-mingw try-job: dist-i686-mingw try-job: dist-x86_64-llvm-mingw try-job: dist-x86_64-mingw try-job: x86_64-mingw-1 try-job: x86_64-mingw-2

rust-bors · 2026-02-19T23:45:04Z

💔 Test for ac89ce2 failed: CI. Failed job:

try - x86_64-mingw-1 (web logs, enhanced plaintext logs)

mati865 · 2026-02-20T00:35:46Z

The hosted runner lost communication with the server. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

@bors try jobs=dist-i686-mingw,dist-x86_64-llvm-mingw,dist-x86_64-mingw,x86_64-mingw-1,x86_64-mingw-2

…tstrap, r=<try> Do not enable split debuginfo for windows-gnu try-job: dist-i686-mingw try-job: dist-x86_64-llvm-mingw try-job: dist-x86_64-mingw try-job: x86_64-mingw-1 try-job: x86_64-mingw-2

rust-bors · 2026-02-20T03:29:52Z

☀️ Try build successful (CI)
Build commit: 150378d (150378dbf9e0da419d4cdc1fdde50f5e9c4ddb6f, parent: 7f99507f57e6c4aa0dce3daf6a13cca8cd4dd312)

Do not enable split debuginfo for windows-gnu

4da823b

Because rustc doesn't handle split debuginfo for these targets, enabling that option causes them to be missing some of the debuginfo.

rustbot assigned Mark-Simulacrum Feb 19, 2026

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) labels Feb 19, 2026

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rust-bors bot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 19, 2026

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JayanAXHF mentioned this pull request Feb 20, 2026

Port the without_debuginfo test from backtrace-rs to the testsuite #152860

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Do not enable split debuginfo for windows-gnu#152870

Do not enable split debuginfo for windows-gnu#152870
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mati865:mingw-disable-packed-debuginfo-in-bootstrap

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