[llvm-testresults] buildbot failure in llvm on dragonegg-x86_64-linux

[Duncan Sands]

Hi Andrew,

>> The Buildbot has detected a new failure of dragonegg-x86_64-linux on llvm.
>> Full details are available at:
>> http://google1.osuosl.org:8011/builders/dragonegg-x86_64-linux/builds/2640
>>
>> Buildbot URL: http://google1.osuosl.org:8011/
>>
>> Buildslave for this Build: gcc17
>>
>> Build Reason:
>> Build Source Stamp: 138810
>> Blamelist: atrick,d0k,evancheng,fjahanian,grosser,resistor
>>
>> BUILD FAILED: failed run.build.script
>
> Can anyone take credit for this crash before I start blindly reverting?
>
> Duncan, can we get a backtrace?

unfortunately what has happened is that the dragonegg plugin has been
miscompiled, which is then causing it to crash compiling regex.c: once
dragonegg has been built using GCC, it is immediately used to build
itself, and this new dragonegg is then compiling regexp.c.  If I use
the GCC built dragonegg plugin then all is well.  It has hard to get a
nice testcase in this kind of situation, so I think the best thing is
to revert suspicious looking patches (in this case, Owen's) and see if
the builder springs back to life.  If it does, try to find the problem
by thinking hard :)  If thinking hard fails, I can try to extract a
testcase.

Ciao, Duncan.