Hi,
After quite a while of trying, I've tracked down the problem that is
causing occasional segfaults in run-tests.php in PHP 6.
Basically, here's what happens:
on line 1652, we call system_with_timeout() to run the test, passing in
a CV ($cmd) containing the command line to execute to run the test. In
the cleanup of the active symbol table when returning from
system_with_timeout(), the refcount of $commandline is not correct, and
so the $cmd zval is efreed. At some random points, the return value of
the run_test() occupies the same space that $cmd once occupied, gets
efreed, and we crash.
To get a segfault every time, put a simple var_dump($cmd); on line 1653
in run-tests.php and do "make test"
So, it seems that either refcounting is not incrementing enough, or
decrementing too much in PHP 6.
Greg