work around linux not honoring write_at for O_APPEND files by the8472 · Pull Request #143166 · rust-lang/rust

the8472 · 2025-06-28T22:28:16Z

the workaround only applies on kernels >= 6.9

rustbot · 2025-06-28T22:28:20Z

rustbot has assigned @thomcc.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

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the8472 · 2025-06-29T15:53:13Z

Weird, the kernel should be new enough.

bors · 2025-07-03T11:34:28Z

☔ The latest upstream changes (presumably #143294) made this pull request unmergeable. Please resolve the merge conflicts.

the8472 · 2025-07-05T13:27:30Z

At this point I'm fairly sure this is a kernel bug in the runner. Tests pass locally, the pwritev2 also happens in CI and doesn't return an error, meaning the flag should be supported.

Filed actions/runner-images#12530

the8472 · 2025-07-17T17:16:34Z

Github engineer directed me to the the ubuntu bug tracker.
https://bugs.launchpad.net/ubuntu/+source/linux-azure-6.11/+bug/2117183

bors · 2025-07-30T22:22:53Z

☔ The latest upstream changes (presumably #144692) made this pull request unmergeable. Please resolve the merge conflicts.

requires a kernel >= 6.9

rustbot · 2026-08-02T21:40:52Z

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

rust-log-analyzer · 2026-08-02T21:55:05Z

The job pr-check-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

  CARGO_UNSTABLE_BUILD_DIR_NEW_LAYOUT: true
  PR_CI_JOB: 1
  IMAGE: pr-check-2
##[endgroup]
Linux runnervmvrwv9 6.17.0-1020-azure #20~24.04.1-Ubuntu SMP Fri Jun 19 20:09:14 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
##[group]Run src/ci/scripts/collect-cpu-stats.sh
src/ci/scripts/collect-cpu-stats.sh
shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}
---

COPY scripts/sccache.sh /scripts/
RUN sh /scripts/sccache.sh

ENV SCRIPT='\
        ldd --version && \
        python3 ../x.py test --stage 1 std -- "write_at" || \
        strace -ffe write,pwritev2,pwrite64,pwritev python3 ../x.py test --stage 1 std -- "write_at"'
#!/bin/sh

# ignore-tidy-file-linelength

set -ex
---
DirectMap4k:      150656 kB
DirectMap2M:     5087232 kB
DirectMap1G:    13631488 kB
##[endgroup]
Executing         ldd --version &&         python3 ../x.py test --stage 1 std -- "write_at" ||         strace -ffe write,pwritev2,pwrite64,pwritev python3 ../x.py test --stage 1 std -- "write_at"
+ ldd --version
ldd (Ubuntu GLIBC 2.35-0ubuntu3.13) 2.35
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.
+ python3 ../x.py test --stage 1 std -- write_at
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.05s
##[endgroup]
downloading https://static.rust-lang.org/dist/2026-07-13/rustfmt-nightly-x86_64-unknown-linux-gnu.tar.xz
extracting /checkout/obj/build/cache/2026-07-13/rustfmt-nightly-x86_64-unknown-linux-gnu.tar.xz to /checkout/obj/build/x86_64-unknown-linux-gnu/rustfmt
---
failures:

---- fs::tests::file_test_append_write_at stdout ----

thread 'fs::tests::file_test_append_write_at' (13759) panicked at library/std/src/fs/tests.rs:611:5:
assertion `left == right` failed
  left: "it\'s not working!   "
 right: "it\'s     working!"
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
---- fs::tests::file_test_append_write_at stdout end ----

failures:
    fs::tests::file_test_append_write_at
---
Bootstrap failed while executing `test --stage 1 std -- write_at`
Currently active steps:
test::Crate { build_compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu, mode: Std, crates: ["std"] } at src/bootstrap/src/core/build_steps/test.rs:3390
Build completed unsuccessfully in 0:07:54
+ strace -ffe write,pwritev2,pwrite64,pwritev python3 ../x.py test --stage 1 std -- write_at
strace: Process 13765 attached
[pid 13765] write(1, "Linux x86_64 x86_64\n", 20) = 20
[pid 13765] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13765, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13766 attached
[pid 13766] write(1, "GNU/Linux\n", 10) = 10
[pid 13766] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13766, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13767 attached
[pid 13767] write(1, "28c66af27578a28bc8cad1c5957be4b1"..., 41) = 41
[pid 13767] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13767, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
write(1, "::group::Building bootstrap\n", 28) = 28
##[group]Building bootstrap
strace: Process 13768 attached
strace: Process 13769 attached
[pid 13768] pwrite64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\256\24\254\237\0\0\0\33\0\0\2\0\0\0\20\0\0\0\0\0"..., 512, 0) = 512
[pid 13768] pwrite64(5, "\0\0\0\17", 4, 512) = 4
[pid 13768] pwrite64(5, "\r\0\0\0m\0\375\0\17\340\17\271\17\233\17}\17W\17/\17\10\16\352\16\305\16\242\16z\16X"..., 4096, 516) = 4096
[pid 13768] pwrite64(5, "\256\24\262%", 4, 4612) = 4
[pid 13768] pwrite64(5, "\0\0\0\24", 4, 4616) = 4
[pid 13768] pwrite64(5, "\r\0\0\0\200\1\21\0\17\350\17\313\17\261\17\225\17z\17b\17I\0171\17\31\16\371\16\335\16\301"..., 4096, 4620) = 4096
[pid 13768] pwrite64(5, "\256\24\263O", 4, 8716) = 4
[pid 13768] pwrite64(5, "\0\0\0\1", 4, 8720) = 4
[pid 13768] pwrite64(5, "SQLite format 3\0\20\0\1\1\0@  \0\0\0\v\0\0\0\33"..., 4096, 8724) = 4096
[pid 13768] pwrite64(5, "\256\24\257\2", 4, 12820) = 4
[pid 13768] pwrite64(5, "\331\325\5\371 \241c\327\0\0\0\3", 12, 0) = 12
[pid 13768] pwrite64(4, "SQLite format 3\0\20\0\1\1\0@  \0\0\0\f\0\0\0\33"..., 4096, 0) = 4096
[pid 13768] pwrite64(4, "\r\0\0\0m\0\375\0\17\340\17\271\17\233\17}\17W\17/\17\10\16\352\16\305\16\242\16z\16X"..., 4096, 57344) = 4096
[pid 13768] pwrite64(4, "\r\0\0\0\200\1\21\0\17\350\17\313\17\261\17\225\17z\17b\17I\0171\17\31\16\371\16\335\16\301"..., 4096, 77824) = 4096
[pid 13768] write(5, "||||", 4)         = 4
strace: Process 13770 attached
[pid 13768] write(2, "    Finished", 12    Finished) = 12
[pid 13768] write(2, " `dev` profile [unoptimized] tar"..., 48 `dev` profile [unoptimized] target(s) in 0.29s
) = 48
[pid 13768] write(5, "|", 1)            = 1
[pid 13768] write(5, "|", 1)            = 1
[pid 13768] write(5, "|", 1)            = 1
[pid 13770] --- SIGUSR1 {si_signo=SIGUSR1, si_code=SI_TKILL, si_pid=13768, si_uid=1001} ---
[pid 13770] write(5, "|", 1)            = 1
[pid 13770] write(5, "|", 1)            = 1
[pid 13770] write(5, "|", 1)            = 1
[pid 13770] +++ exited with 0 +++
[pid 13768] write(10, "/checkout/obj/build/bootstrap/de"..., 4162) = 4162
[pid 13768] write(10, "/checkout/obj/build/bootstrap/de"..., 4194) = 4194
[pid 13768] write(10, "/checkout/obj/build/bootstrap/de"..., 4322) = 4322
[pid 13768] write(10, "/checkout/obj/build/bootstrap/de"..., 4273) = 4273
[pid 13769] +++ exited with 0 +++
[pid 13768] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13768, si_uid=1001, si_status=0, si_utime=5, si_stime=8} ---
write(1, "::endgroup::\n", 13::endgroup::
)          = 13
strace: Process 13771 attached
strace: Process 13772 attached
[pid 13772] write(1, "../\n", 4)        = 4
[pid 13772] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13772, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13773 attached
[pid 13773] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13773, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13774 attached
strace: Process 13775 attached
strace: Process 13776 attached
[pid 13775] write(1, "1fe9a0cf8a6f5751d4c36e40358a0075"..., 41) = 41
[pid 13775] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13775, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13774] write(1, "2026-08-02", 10)  = 10
[pid 13774] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13774, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13776] write(1, "1fe9a0cf8\n", 10) = 10
[pid 13776] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13776, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13777 attached
strace: Process 13778 attached
[pid 13777] write(4, "||||||||||||||||||||||||||||||||", 32) = 32
strace: Process 13779 attached
strace: Process 13780 attached
[pid 13779] write(1, "/checkout/obj/build/x86_64-unkno"..., 52) = 52
[pid 13779] +++ exited with 0 +++
[pid 13780] +++ exited with 0 +++
[pid 13778] +++ exited with 0 +++
[pid 13777] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13777, si_uid=1001, si_status=0, si_utime=0, si_stime=1} ---
strace: Process 13781 attached
[pid 13781] write(1, "28c66af27578a28bc8cad1c5957be4b1"..., 41) = 41
[pid 13781] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13781, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13782 attached
strace: Process 13783 attached
strace: Process 13784 attached
strace: Process 13785 attached
strace: Process 13786 attached
strace: Process 13787 attached
strace: Process 13788 attached
strace: Process 13789 attached
strace: Process 13790 attached
strace: Process 13791 attached
strace: Process 13792 attached
strace: Process 13794 attached
strace: Process 13795 attached
strace: Process 13793 attached
strace: Process 13796 attached
strace: Process 13797 attached
strace: Process 13798 attached
strace: Process 13799 attached
strace: Process 13800 attached
strace: Process 13801 attached
strace: Process 13802 attached
[pid 13792] +++ exited with 0 +++
[pid 13795] +++ exited with 0 +++
[pid 13799] +++ exited with 0 +++
[pid 13793] +++ exited with 0 +++
[pid 13797] +++ exited with 0 +++
[pid 13794] +++ exited with 0 +++
[pid 13789] +++ exited with 0 +++
[pid 13798] +++ exited with 0 +++
[pid 13801] +++ exited with 0 +++
[pid 13791] +++ exited with 0 +++
[pid 13796] +++ exited with 0 +++
[pid 13802] +++ exited with 0 +++
[pid 13800] +++ exited with 0 +++
[pid 13786] +++ exited with 0 +++
[pid 13787] +++ exited with 0 +++
[pid 13785] +++ exited with 0 +++
[pid 13783] +++ exited with 0 +++
[pid 13790] +++ exited with 0 +++
[pid 13788] +++ exited with 0 +++
[pid 13784] +++ exited with 0 +++
[pid 13782] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13782, si_uid=1001, si_status=0, si_utime=23, si_stime=137} ---
strace: Process 13803 attached
strace: Process 13804 attached
strace: Process 13805 attached
[pid 13804] +++ exited with 0 +++
strace: Process 13806 attached
strace: Process 13807 attached
[pid 13805] +++ exited with 0 +++
[pid 13806] +++ exited with 0 +++
strace: Process 13808 attached
[pid 13807] +++ exited with 0 +++
strace: Process 13809 attached
[pid 13808] +++ exited with 0 +++
strace: Process 13810 attached
[pid 13809] +++ exited with 0 +++
strace: Process 13811 attached
[pid 13810] +++ exited with 0 +++
strace: Process 13812 attached
[pid 13811] +++ exited with 0 +++
strace: Process 13813 attached
[pid 13812] +++ exited with 0 +++
strace: Process 13814 attached
[pid 13813] +++ exited with 0 +++
[pid 13814] +++ exited with 0 +++
strace: Process 13815 attached
strace: Process 13816 attached
[pid 13815] +++ exited with 0 +++
[pid 13816] +++ exited with 0 +++
strace: Process 13817 attached
strace: Process 13818 attached
[pid 13817] +++ exited with 0 +++
strace: Process 13819 attached
strace: Process 13820 attached
[pid 13818] +++ exited with 0 +++
strace: Process 13821 attached
[pid 13819] +++ exited with 0 +++
[pid 13820] +++ exited with 0 +++
strace: Process 13822 attached
[pid 13821] +++ exited with 0 +++
strace: Process 13823 attached
[pid 13822] +++ exited with 0 +++
[pid 13823] +++ exited with 0 +++
strace: Process 13824 attached
strace: Process 13825 attached
strace: Process 13826 attached
strace: Process 13827 attached
strace: Process 13828 attached
strace: Process 13829 attached
strace: Process 13831 attached
strace: Process 13830 attached
strace: Process 13834 attached
strace: Process 13833 attached
strace: Process 13832 attached
strace: Process 13835 attached
strace: Process 13836 attached
strace: Process 13837 attached
strace: Process 13838 attached
strace: Process 13839 attached
strace: Process 13840 attached
strace: Process 13841 attached
strace: Process 13842 attached
strace: Process 13843 attached
strace: Process 13844 attached
[pid 13836] +++ exited with 0 +++
[pid 13837] +++ exited with 0 +++
[pid 13838] +++ exited with 0 +++
[pid 13839] +++ exited with 0 +++
[pid 13841] +++ exited with 0 +++
[pid 13840] +++ exited with 0 +++
[pid 13835] +++ exited with 0 +++
[pid 13830] +++ exited with 0 +++
[pid 13829] +++ exited with 0 +++
[pid 13826] +++ exited with 0 +++
[pid 13842] +++ exited with 0 +++
[pid 13825] +++ exited with 0 +++
[pid 13828] +++ exited with 0 +++
[pid 13844] +++ exited with 0 +++
[pid 13833] +++ exited with 0 +++
[pid 13834] +++ exited with 0 +++
[pid 13831] +++ exited with 0 +++
[pid 13832] +++ exited with 0 +++
[pid 13843] +++ exited with 0 +++
[pid 13827] +++ exited with 0 +++
[pid 13824] +++ exited with 0 +++
[pid 13803] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13824, si_uid=1001, si_status=0, si_utime=22, si_stime=233} ---
[pid 13803] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13803, si_uid=1001, si_status=0, si_utime=1, si_stime=1} ---
strace: Process 13845 attached
[pid 13845] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13845, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13846 attached
strace: Process 13847 attached
strace: Process 13848 attached
[pid 13846] write(1, "2026-07-29", 10)  = 10
[pid 13846] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13846, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13847] write(1, "7c83d4cc0953b81d823e47d640c64da9"..., 41) = 41
[pid 13847] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13847, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13848] write(1, "7c83d4cc0\n", 10) = 10
[pid 13848] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13848, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13849 attached
[pid 13849] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13849, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13850 attached
strace: Process 13851 attached
strace: Process 13852 attached
[pid 13850] write(1, "2026-04-05", 10)  = 10
[pid 13850] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13850, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13851] write(1, "6f155cc3f5a2dff33afe6cc3ed6c2e0e"..., 41) = 41
[pid 13851] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13851, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13852] write(1, "6f155cc3f\n", 10) = 10
[pid 13852] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13852, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13853 attached
[pid 13853] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13853, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13854 attached
strace: Process 13855 attached
strace: Process 13856 attached
[pid 13854] write(1, "2026-07-10", 10)  = 10
[pid 13854] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13854, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13855] write(1, "52ed14fcd56afc30f9cccd8ca8ce237c"..., 41) = 41
[pid 13855] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13855, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13856] write(1, "52ed14fcd\n", 10) = 10
[pid 13856] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13856, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13857 attached
[pid 13857] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13857, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13858 attached
strace: Process 13859 attached
strace: Process 13860 attached
[pid 13858] write(1, "2026-07-31", 10)  = 10
[pid 13858] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13858, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13859] write(1, "a9b96ed28ed25bd9e393d7fd14778ace"..., 41) = 41
[pid 13859] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13859, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13860] write(1, "a9b96ed28\n", 10) = 10
[pid 13860] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13860, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13771] write(3, "13771", 5)        = 5
strace: Process 13861 attached
strace: Process 13862 attached
[pid 13861] write(4, "||||||||||||||||||||||||||||||||", 32) = 32
strace: Process 13863 attached
strace: Process 13864 attached
[pid 13863] write(1, "/checkout/obj/build/x86_64-unkno"..., 93) = 93
[pid 13863] +++ exited with 0 +++
[pid 13864] +++ exited with 0 +++
[pid 13862] +++ exited with 0 +++
[pid 13861] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13861, si_uid=1001, si_status=0, si_utime=0, si_stime=1} ---
strace: Process 13865 attached
strace: Process 13866 attached
[pid 13865] write(1, "rustc 1.98.0-beta.2 (08d5b675a 2"..., 43) = 43
[pid 13865] write(1, "binary: rustc\n", 14) = 14
[pid 13865] write(1, "commit-hash: 08d5b675a9b2abdca5e"..., 54) = 54
[pid 13865] write(1, "commit-date: 2026-07-12\n", 24) = 24
[pid 13865] write(1, "host: x86_64-unknown-linux-gnu\n", 31) = 31
[pid 13865] write(1, "release: 1.98.0-beta.2\n", 23) = 23
[pid 13865] write(1, "LLVM version: 22.1.8\n", 21) = 21
[pid 13866] +++ exited with 0 +++
[pid 13865] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13865, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13771] write(4, "#ifdef __clang__\n#pragma message"..., 206) = 206
strace: Process 13867 attached
strace: Process 13868 attached
[pid 13868] write(1, "# 0 \"/checkout/obj/build/tmp/cc-"..., 400) = 400
[pid 13868] +++ exited with 0 +++
[pid 13867] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13868, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13867] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13867, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13869 attached
[pid 13869] write(2, "cc: error: unrecognized command-"..., 53) = 53
[pid 13869] write(2, "cc: fatal error: no input files\n", 32) = 32
[pid 13869] write(2, "compilation terminated.\n", 24) = 24
[pid 13869] +++ exited with 1 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13869, si_uid=1001, si_status=1, si_utime=0, si_stime=0} ---
[pid 13771] write(4, "#ifdef __clang__\n#pragma message"..., 206) = 206
strace: Process 13870 attached
strace: Process 13871 attached
[pid 13871] write(1, "# 0 \"/checkout/obj/build/tmp/cc-"..., 400) = 400
[pid 13871] +++ exited with 0 +++
[pid 13870] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13871, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13870] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13870, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
strace: Process 13872 attached
[pid 13872] write(2, "c++: error: unrecognized command"..., 54) = 54
[pid 13872] write(2, "c++: fatal error: no input files"..., 33) = 33
[pid 13872] write(2, "compilation terminated.\n", 24) = 24
[pid 13872] +++ exited with 1 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13872, si_uid=1001, si_status=1, si_utime=0, si_stime=0} ---
[pid 13771] write(1, "[TIMING:start] tool::LibcxxVersi"..., 76) = 76
[TIMING:start] tool::LibcxxVersionTool { target: x86_64-unknown-linux-gnu }
strace: Process 13873 attached
[pid 13873] write(1, "libstdc++ version: 11\n", 22) = 22
[pid 13873] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13873, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13771] write(1, "[TIMING:end] tool::LibcxxVersion"..., 83[TIMING:end] tool::LibcxxVersionTool { target: x86_64-unknown-linux-gnu } -- 0.010
) = 83
strace: Process 13874 attached
strace: Process 13875 attached
[pid 13874] write(4, "||||||||||||||||||||||||||||||||", 32) = 32
strace: Process 13876 attached
strace: Process 13877 attached
[pid 13876] write(1, "aarch64-apple-darwin\naarch64-app"..., 7966) = 7966
[pid 13876] +++ exited with 0 +++
[pid 13877] +++ exited with 0 +++
[pid 13875] +++ exited with 0 +++
[pid 13874] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13874, si_uid=1001, si_status=0, si_utime=0, si_stime=1} ---
strace: Process 13878 attached
[pid 13878] write(1, "{\"packages\":[{\"name\":\"rustc-main"..., 378055) = 378055
[pid 13878] write(1, "\n", 1)           = 1
[pid 13878] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13878, si_uid=1001, si_status=0, si_utime=2, si_stime=4} ---
strace: Process 13879 attached
[pid 13879] write(1, "{\"packages\":[{\"name\":\"std\",\"vers"..., 36800) = 36800
[pid 13879] write(1, "\n", 1)           = 1
[pid 13879] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13879, si_uid=1001, si_status=0, si_utime=1, si_stime=1} ---
strace: Process 13880 attached
strace: Process 13881 attached
[pid 13880] write(4, "||||||||||||||||||||||||||||||||", 32) = 32
strace: Process 13882 attached
strace: Process 13883 attached
[pid 13882] write(1, "/checkout/obj/build/x86_64-unkno"..., 52) = 52
[pid 13882] +++ exited with 0 +++
[pid 13883] +++ exited with 0 +++
[pid 13881] +++ exited with 0 +++
[pid 13880] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13880, si_uid=1001, si_status=0, si_utime=0, si_stime=1} ---
[pid 13771] write(4, "1785707299113455497", 19) = 19
[pid 13771] write(4, "1785707299344461357", 19) = 19
[pid 13771] write(4, "1785707614935062201", 19) = 19
[pid 13771] write(1, "[TIMING:start] compile::Assemble"..., 132) = 132
[TIMING:start] compile::Assemble { target_compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false } }
[pid 13771] write(1, "[TIMING:start] builder::Libdir {"..., 157[TIMING:start] builder::Libdir { compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu }
) = 157
[TIMING:start] compile::Sysroot { compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false }, force_recompile: false }
[pid 13771] write(1, "[TIMING:start] compile::Sysroot "..., 148) = 148
[pid 13771] write(1, "[TIMING:end] compile::Sysroot { "..., 155) = 155
[TIMING:end] compile::Sysroot { compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false }, force_recompile: false } -- 0.006
[pid 13771] write(1, "[TIMING:end] builder::Libdir { c"..., 164) = 164
[TIMING:end] builder::Libdir { compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu } -- 0.000
[TIMING:start] llvm::Llvm { target: x86_64-unknown-linux-gnu }
[pid 13771] write(1, "[TIMING:start] llvm::Llvm { targ"..., 63) = 63
strace: Process 13884 attached
[pid 13884] write(1, "22.1.8-rust-1.99.0-nightly\n", 27) = 27
[pid 13884] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13884, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[TIMING:end] llvm::Llvm { target: x86_64-unknown-linux-gnu } -- 0.017
[pid 13771] write(1, "[TIMING:end] llvm::Llvm { target"..., 70) = 70
strace: Process 13885 attached
[pid 13885] write(1, "/checkout/obj/build/x86_64-unkno"..., 57) = 57
[pid 13885] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13885, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13771] write(2, "/checkout/obj/build/x86_64-unkno"..., 67/checkout/obj/build/x86_64-unknown-linux-gnu/ci-llvm/bin/llvm-strip) = 67
[pid 13771] write(2, " does not exist; skipping copy\n", 31 does not exist; skipping copy
) = 31
[TIMING:start] compile::Assemble { target_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false } }
[pid 13771] write(1, "[TIMING:start] compile::Assemble"..., 132) = 132
[pid 13771] write(1, "[TIMING:end] compile::Assemble {"..., 139[TIMING:end] compile::Assemble { target_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false } } -- 0.000
) = 139
[pid 13771] write(1, "[TIMING:start] compile::Rustc { "..., 174) = 174
[TIMING:start] compile::Rustc { target: x86_64-unknown-linux-gnu, build_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, crates: [] }
[TIMING:start] compile::StdLink { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu, crates: [], force_recompile: false }
[pid 13771] write(1, "[TIMING:start] compile::StdLink "..., 290) = 290
[pid 13771] write(1, "[TIMING:start] builder::Libdir {"..., 157) = 157
[pid 13771] write(1, "[TIMING:start] compile::Sysroot "..., 148[TIMING:start] builder::Libdir { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu }
[TIMING:start] compile::Sysroot { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, force_recompile: false }
) = 148
strace: Process 13886 attached
[pid 13886] write(1, "/checkout/obj/build/x86_64-unkno"..., 91) = 91
[pid 13886] +++ exited with 0 +++
[pid 13771] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13886, si_uid=1001, si_status=0, si_utime=0, si_stime=0} ---
[pid 13771] write(4, "INPUT(", 6)       = 6
[pid 13771] write(4, "libLLVM.so.22.1-rust-1.99.0-nigh"..., 35) = 35
[pid 13771] write(4, ")\n", 2)          = 2
[pid 13771] write(1, "[TIMING:end] compile::Sysroot { "..., 155) = 155
[TIMING:end] compile::Sysroot { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, force_recompile: false } -- 0.032
[pid 13771] write(4, "INPUT(", 6)       = 6
[pid 13771] write(4, "libLLVM.so.22.1-rust-1.99.0-nigh"..., 35) = 35
[pid 13771] write(4, ")\n", 2)          = 2
[pid 13771] write(1, "[TIMING:end] builder::Libdir { c"..., 164) = 164
[TIMING:end] builder::Libdir { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu } -- 0.005
[TIMING:end] compile::StdLink { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu, crates: [], force_recompile: false } -- 0.016
[pid 13771] write(1, "[TIMING:end] compile::StdLink { "..., 297) = 297
##[group]Building stage1 compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
[pid 13771] write(1, "::group::Building stage1 compile"..., 89) = 89
strace: Process 13887 attached
strace: Process 13888 attached
[pid 13887] pwrite64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\231\350C|\0\0\0\33\0\0\2\0\0\0\20\0\0\0\0\0"..., 512, 0) = 512
[pid 13887] pwrite64(5, "\0\0\0\23", 4, 512) = 4
[pid 13887] pwrite64(5, "\r\0\0\0e\0\322\0\17\335\17\267\17\220\17g\17B\17\31\16\367\16\315\16\254\16\203\16\\\16-"..., 4096, 516) = 4096
[pid 13887] pwrite64(5, "\231\350I*", 4, 4612) = 4
[pid 13887] pwrite64(5, "\0\0\0\20", 4, 4616) = 4
[pid 13887] pwrite64(5, "\r\0\0\0g\0\365\0\17\334\17\273\17\236\17|\17S\0170\17\4\16\346\16\266\16\216\16h\16A"..., 4096, 4620) = 4096
[pid 13887] pwrite64(5, "\231\350JA", 4, 8716) = 4
[pid 13887] pwrite64(5, "\0\0\0\17", 4, 8720) = 4
[pid 13887] pwrite64(5, "\r\0\0\0m\0\375\0\17\340\17\271\17\233\17}\17W\17/\17\10\16\352\16\305\16\242\16z\16X"..., 4096, 8724) = 4096
[pid 13887] pwrite64(5, "\231\350H\372", 4, 12820) = 4
[pid 13887] pwrite64(5, "\0\0\0\25", 4, 12824) = 4
[pid 13887] pwrite64(5, "\r\0\0\0x\0\372\0\17\336\17\277\17\247\17\212\17o\17R\17,\17\20\16\362\16\323\16\265\16\227"..., 4096, 12828) = 4096
[pid 13887] pwrite64(5, "\231\350IM", 4, 16924) = 4
[pid 13887] pwrite64(5, "\0\0\0\24", 4, 16928) = 4
[pid 13887] pwrite64(5, "\r\0\0\0\200\1\21\0\17\350\17\313\17\261\17\225\17z\17b\17I\0171\17\31\16\371\16\335\16\301"..., 4096, 16932) = 4096
[pid 13887] pwrite64(5, "\231\350J,", 4, 21028) = 4
[pid 13887] pwrite64(5, "\0\0\0\30", 4, 21032) = 4
[pid 13887] pwrite64(5, "\r\0\0\0L\6%\0\17\337\17\276\17\245\17r\17E\17)\17\1\16\332\16\300\16\242\16z\16N"..., 4096, 21036) = 4096
[pid 13887] pwrite64(5, "\231\350FW", 4, 25132) = 4
[pid 13887] pwrite64(5, "\0\0\0\1", 4, 25136) = 4
[pid 13887] pwrite64(5, "SQLite format 3\0\20\0\1\1\0@  \0\0\0\f\0\0\0\33"..., 4096, 25140) = 4096
[pid 13887] pwrite64(5, "\231\350E\337", 4, 29236) = 4
[pid 13887] pwrite64(5, "\331\325\5\371 \241c\327\0\0\0\7", 12, 0) = 12
[pid 13887] pwrite64(4, "SQLite format 3\0\20\0\1\1\0@  \0\0\0\r\0\0\0\33"..., 4096, 0) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0m\0\375\0\17\340\17\271\17\233\17}\17W\17/\17\10\16\352\16\305\16\242\16z\16X"..., 4096, 57344) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0g\0\365\0\17\334\17\273\17\236\17|\17S\0170\17\4\16\346\16\266\16\216\16h\16A"..., 4096, 61440) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0e\0\322\0\17\335\17\267\17\220\17g\17B\17\31\16\367\16\315\16\254\16\203\16\\\16-"..., 4096, 73728) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0\200\1\21\0\17\350\17\313\17\261\17\225\17z\17b\17I\0171\17\31\16\371\16\335\16\301"..., 4096, 77824) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0x\0\372\0\17\336\17\277\17\247\17\212\17o\17R\17,\17\20\16\362\16\323\16\265\16\227"..., 4096, 81920) = 4096
[pid 13887] pwrite64(4, "\r\0\0\0L\6%\0\17\337\17\276\17\245\17r\17E\17)\17\1\16\332\16\300\16\242\16z\16N"..., 4096, 94208) = 4096
[pid 13887] write(5, "||||", 4)         = 4
strace: Process 13889 attached
[pid 13887] write(2, "[RUSTC-TIMING] build_script_buil"..., 50[RUSTC-TIMING] build_script_build test:false 0.155) = 50
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 769) = 769
[pid 13887] write(1, "{\"reason\":\"build-script-executed"..., 362) = 362
[pid 13887] write(2, "[RUSTC-TIMING] build_script_buil"..., 50[RUSTC-TIMING] build_script_build test:false 0.124) = 50
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 742) = 742
[pid 13887] write(2, "[RUSTC-TIMING] unicode_ident tes"..., 45[RUSTC-TIMING] unicode_ident test:false 0.052) = 45
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 906) = 906
[pid 13887] write(2, "[RUSTC-TIMING] cfg_if test:false"..., 38[RUSTC-TIMING] cfg_if test:false 0.034) = 38
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 897) = 897
[pid 13887] write(1, "{\"reason\":\"build-script-executed"..., 282) = 282
[pid 13887] write(2, "[RUSTC-TIMING] proc_macro2 test:"..., 43[RUSTC-TIMING] proc_macro2 test:false 0.460) = 43
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 915) = 915
[pid 13887] write(2, "[RUSTC-TIMING] build_script_buil"..., 50[RUSTC-TIMING] build_script_build test:false 0.163) = 50
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 749) = 749
[pid 13887] write(2, "[RUSTC-TIMING] stable_deref_trai"..., 50[RUSTC-TIMING] stable_deref_trait test:false 0.034) = 50
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 1016) = 1016
[pid 13887] write(2, "[RUSTC-TIMING] quote test:false "..., 37[RUSTC-TIMING] quote test:false 0.196) = 37
[pid 13887] write(2, "\n", 1
)           = 1
[pid 13887] write(1, "{\"reason\":\"compiler-artifact\",\"p"..., 864) = 864
[pid 13887] write(1, "{\"reason\":\"build-script-executed"..., 317) = 317

rust-bors · 2026-09-07T00:32:26Z

☔ The latest upstream changes (presumably #162092) made this pull request unmergeable. Please resolve the merge conflicts by rebasing.

rustbot assigned thomcc Jun 28, 2025

rustbot added O-unix Operating system: Unix-like S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jun 28, 2025