Hi,

On Tue, Mar 22, 2022 at 12:41:01PM +0000, buildbot@builder.wildebeest.org wrote:
> The Buildbot has detected a new failure on builder gccrust-debian-arm64 while building gccrust.
> Full details are available at:
>     https://builder.wildebeest.org/buildbot/#builders/58/builds/1770
> 
> Buildbot URL: https://builder.wildebeest.org/buildbot/
> 
> Worker for this Build: debian-arm64
> 
> Build Reason: <unknown>
> Blamelist: Arthur Cohen <arthur.cohen@embecosm.com>, bors[bot] <26634292+bors[bot]@users.noreply.github.com>
> 
> BUILD FAILED: failed 'grep unexpected ...' (failure)

This is on all arches and happened after:

commit f8c550f7e19c79c98f6d21ad6ce68d615451459a
Author: Arthur Cohen <arthur.cohen@embecosm.com>
Date:   Fri Mar 18 13:20:09 2022 +0100

    macros: Only expand merged repetitions if they contain the same amount
    of matches
    
    Forbid merging repetitions if the matched fragments do not contain the
    same amount of repetitions

But I am not sure how/why.

The last step fails with:

grep unexpected gcc/testsuite/rust/rust.sum; test $? -eq 1
# of unexpected failures	9

But that canot be seen in the saved rust.sum or rust.log files...
So something is going wrong there. It seems the buildbot captured the
wrong logs because I can see the failures in rust.log for the worker.

See the attached rust.log file which has several errors like:

/srv/buildbot/worker/gccrust-fedora-x86_64/gccrs/gcc/testsuite/rust/compile/macro26.rs:7:13: error: Failed to match any rule within macro
compiler exited with status 1
FAIL: rust/compile/macro26.rs  at line 3 (test for errors, line 2)
FAIL: rust/compile/macro26.rs (test for excess errors)
Excess errors:
/srv/buildbot/worker/gccrust-fedora-x86_64/gccrs/gcc/testsuite/rust/compile/macro26.rs:7:28: error: expecting ',' but ';' found

Cheers,

Mark