Merged revisions 76146 via svnmerge from

Merged revisions 76146 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r76146 | brett.cannon | 2009-11-07 15:55:05 -0800 (Sat, 07 Nov 2009) | 6 lines

  When trying to write new bytecode, importlib was not catching the IOError
  thrown if the file happened to be read-only to keep the failure silent.

  Fixes issue #7187. Thanks, Dave Malcolm for the report and analysis of the
  problem.
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