tree 523e665dd1117dadd7d60fbc0ccb5a2a4574d989
parent fb5c932dbbe2e7fc3ed4f0af71dc8ac76f22df57
author Narayan Kamath <narayan@google.com> 1418205614 +0000
committer Narayan Kamath <narayan@google.com> 1418205704 +0000

Avoid tearing down process groups twice.

The second removal always triggers a warning.

Change-Id: Ieafa8374dbffdaff0d576de004a688cae6f8ac18