Traceback (most recent call last): File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 293, in addCallbacks self._runCallbacks() File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 575, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 380, in callback self._startRunCallbacks(result) File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 488, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 575, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/buildbot/steps/transfer.py", line 288, in cancel fileWriter.cancel() File "/home/buildmaster/vbuildbot/local/lib/python2.7/site-packages/buildbot/steps/transfer.py", line 93, in cancel os.unlink(self.destfile) exceptions.OSError: [Errno 2] No such file or directory: '/home/buildmaster/nightly/main/pypy-c-jit-171204-89d59559f278-macos_x86_64.tar.bz2'