symfony/symfony — pull request #8801 by tgabi333 (2013-08-20 13:14:40+00:00)
Title: [Process] fix for Process:isSuccessful()

| Q | A
| ------------- | ---
| Bug fix? | [yes]
| New feature? | [no]
| BC breaks? | [maybe]
| Deprecations? | [no]
| Tests pass? | [yes]
| Fixed tickets | []
| License | MIT
| Doc PR | []

If you call isSuccessful() on a running process you would get true because of 0 == null. I think that is not the expected behavior and that is not what phpdoc @return block said so.

This PR fixes another phpunit failure on testCheckTimeoutOnStartedProcess