on windows, if launched from cmd, subprocess calls fail

[dfberger]

if you launch sublime from a command prompt, python subprocess calls fail thusly:

Exception in thread Thread-3: Traceback (most recent call last): File ".\threading.py", line 532, in bootstrap_inner File ".\Perforce.py", line 688, in run File ".\Perforce.py", line 665, in MakeCheckedOutFileList File ".\Perforce.py", line 639, in MakeFileListFromChangelist File ".\Perforce.py", line 91, in GetUserFromClientspec File ".\subprocess.py", line 626, in __init File ".\subprocess.py", line 734, in _get_handles File ".\subprocess.py", line 773, in _make_inheritable WindowsError: [Error 6] The handle is invalid

it looks like a python/windows interop issue that you get a handle from cmd that suprocess tries to duphandle and fails.

if you provide pipes (or devnull) for all three of stdin/stdout/stderr, this should go away.