buildbot failure in LLVM on sanitizer-windows

[Kostya Serebryany via llvm-commits]

Yes, sure, thanks!

On Wed, Jul 19, 2017 at 4:55 PM, Reid Kleckner <rnk at google.com> wrote:

> On Wed, Jul 19, 2017 at 3:27 PM, Davide Italiano <davide at freebsd.org>
> wrote:
>
>> On Wed, Jul 19, 2017 at 3:12 PM,  <llvm.buildmaster at lab.llvm.org> wrote:
>> > The Buildbot has detected a new failure on builder sanitizer-windows
>> while building llvm.
>> > Full details are available at:
>> >  http://lab.llvm.org:8011/builders/sanitizer-windows/builds/14405
>> >
>> > Buildbot URL: http://lab.llvm.org:8011/
>> >
>> > Buildslave for this Build: sanitizer-windows
>> >
>> > Build Reason: scheduler
>> > Build Source Stamp: [branch trunk] 308524
>> > Blamelist: davide
>> >
>> > BUILD FAILED: failed run fuzzer tests
>> >
>> > sincerely,
>> >  -The Buildbot
>> >
>>
>> This failure doesn't really seem related to any of my (recent)
>> changes, but I may have overlooked, in which case, please let me know
>> if there's something I can help with.
>>
>
> This failure mode has happened twice in the last 100 builds:
> http://lab.llvm.org:8011/builders/sanitizer-windows/
> builds/14405/steps/run%20fuzzer%20tests/logs/stdio
> http://lab.llvm.org:8011/builders/sanitizer-windows/
> builds/14358/steps/run%20fuzzer%20tests/logs/stdio
>
> We get a different OOM message than the one the test expects:
> $ "FileCheck" "C:\b\slave\sanitizer-windows\llvm\lib\Fuzzer\test\fuzzer-oom.test"
> "--check-prefix=SINGLE_LARGE_MALLOC"
> # command stderr:
> C:\b\slave\sanitizer-windows\llvm\lib\Fuzzer\test\fuzzer-oom.test:8:22:
> error: expected string not found in input
> SINGLE_LARGE_MALLOC: libFuzzer: out-of-memory (malloc(53{{.*}}))
>                      ^
> <stdin>:1:1: note: scanning from here
> INFO: Seed: 943780335
> ^
> <stdin>:10:17: note: possible intended match here
> ==1244== ERROR: libFuzzer: out-of-memory (used: 387Mb; limit: 300Mb)
>                 ^
> error: command failed with exit status: 1
>
> kcc, can I relax the FileCheck CHECK to make this less flaky? It's
> probably not worth digging in to find out why we get different messages.
>
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