[phobos] unit test hangs

[Brad Roberts]

On 10/7/2010 9:22 PM, Brad Roberts wrote:
> On 10/7/2010 9:09 PM, Brad Roberts wrote:
>> Between r2086 and 2089 the phobos tests on win32 only have started hanging.
>>
>> Last good:
>>     http://d.puremagic.com/test-results/test.ghtml?runid=1374
>>
>> First bad:
>>     http://d.puremagic.com/test-results/test.ghtml?runid=1376
> 
> Until someone tells me it's been fixed (or I get a timeout to kill the stalled
> test coded up), I've disabled the phobos test step so that at least the rest of
> the testing occurs.

Ok, now that the linux builds are back in action, it's phobos tests also hang.
But since the posix based test mechanisms are a lot nicer, it's easy to tell
that it's the concurrency test that's at fault.  It seems to be a pure stall, as
the app is idle, not consuming cpu time.

Strace shows no activity.

I tried attaching gdb and getting a stack trace, but gdb's stack walker got
pissed off (slightly edited for brevity):

(gdb) thr apply all bt

Thread 2 (Thread 0x404d2b70 (LWP 25772)):
#0  0x4001d422 in __kernel_vsyscall ()
#1  0x40041015 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/i686/cmov/libpthread.so.0
#2  0x0809cc2a in core.sync.condition.Condition.wait() ()
buildsym.c:818: internal-error: start_symtab: Assertion `! pending_addrmap' failed.

Thread 1 (Thread 0x401d1780 (LWP 25771)):
#0  0x4001d422 in __kernel_vsyscall ()
#1  0x40041015 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/i686/cmov/libpthread.so.0
#2  0x0809cc2a in core.sync.condition.Condition.wait() ()
buildsym.c:818: internal-error: start_symtab: Assertion `! pending_addrmap' failed.