Do not enable split debuginfo for windows-gnu

[mati865]

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

[rustbot]

r? @Mark-Simulacrum

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[mati865]

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]

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

[rust-bors]

💔 Test for ac89ce2 failed: CI. Failed job:

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

[mati865]

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

[rust-bors]

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

[mati865]

Oh, I didn't realize it was marked as waiting on me by bors.

@rustbot ready

[Mark-Simulacrum]

@bors r+

View changes since this review

[Mark-Simulacrum]

Should we be warning about it from rustc and/or erroring out?

[mati865]

Honestly? I don't know.

I haven't tried that but it should be possible to make split debuginfo work with the right combination of linker flags. For example when linking with LLD one can add argument to create .pdb files with debuginfo. I don't know whether this needs compiler support.

I'm totally clueless whether split debuginfo is possible with Dwarf on Windows.

[rust-bors]

📌 Commit 4da823b has been approved by Mark-Simulacrum

It is now in the queue for this repository.