Need help debugging yacc test failure in CURRENT

[Garrett Cooper]

> On Oct 2, 2014, at 11:10, Garrett Cooper <yaneurabeya at gmail.com> wrote:
> 
> 
>>> 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.

Let me rephrase that. Using an older atf/kyua didn't repro the bug, so it's probably atf/kyua