164813 2016-11-15 19:19:14 -0800 check-webkit-style: False posive Instance of 'Popen' has no 'kill' member [pylint/E1101] [5] 2017-03-02 16:42:40 -0800 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified NEW P2 Normal --- 164792 169084 1 clopez webkit-unassigned lforschler oldest_to_newest 1251771 0 clopez 2016-11-15 19:19:14 -0800 At https://bugs.webkit.org/show_bug.cgi?id=164792#c2 check-webkit-style complains with: ERROR: Tools/Scripts/webkitpy/benchmark_runner/browser_driver/linux_browser_driver.py:85: [LinuxBrowserDriver.close_browsers] Instance of 'Popen' has no 'kill' member [pylint/E1101] [5] Total errors found: 1 in 10 files This is a false positive: Popen.kill() Kills the child. On Posix OSs the function sends SIGKILL to the child. On Windows kill() is an alias for terminate(). New in version 2.6. https://docs.python.org/2/library/subprocess.html#subprocess.Popen Note: I want to believe that we don't support python < 2.6 :)