io test fails in parallel: RuntimeError: *** Error: Not a DOLFIN XML file

[Johannes Ring]

The io unit test 'test/unit/io/python/test.py' fails with the following error on the maverick-i386 when run in parallel:

buildbot@buildmaster:python$ mpirun -np 3 python test.py
...E
======================================================================
ERROR: testSaveReadVector (__main__.VectorXML_IO)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test.py", line 37, in testSaveReadVector
    out_file >> y
RuntimeError: *** Error: Not a DOLFIN XML file

----------------------------------------------------------------------
Ran 2 tests in 0.117s

FAILED (errors=1)

At this point it hangs completely and the buildbot times out.

[Anders Logg (logg)]

Has this bug been fixed? The buildbot is green.