Need help debugging yacc test failure in CURRENT

[Garrett Cooper]

> On Oct 2, 2014, at 10:56, Julio Merino <jmmv at freebsd.org> wrote:
> 
>> On Thu, Oct 2, 2014 at 5:23 AM, Craig Rodrigues <rodrigc at freebsd.org> wrote:
>> Hi,
>> 
>> I have managed to eliminate all the test failures from /usr/tests in CURRENT
>> except for one failure.  See:
>> 
>> https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-tests2/8/testReport/
>> 
>> I can reproduce the failure by doing the following:
>> 
>> mkdir /tmp/x
>> cd /tmp/x
>> /usr/tests/usr.bin/yacc/yacc_tests  usr.bin.yacc.yacc_tests.main
>> 
>> I then get a core file: /tmp/x/test/yacc.core
>> 
>> Can someone help debug and fix this?
> 
> What you'd do until someone fixes the yacc bug is file a PR for this
> crash and then mark the test as "expected failure" (or TODO in TAP
> terms).

There already is a bug (look or bugs I filed related to yacc). Someone broke behavior in the kernel or libc that yacc depends on.