Merged revisions 1461738 via  git cherry-pick from
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  r1461738 | dkulp | 2013-03-27 13:47:25 -0400 (Wed, 27 Mar 2013) | 2 lines

  Fix tests by allowing for the null return.

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Merged revisions 1461739 via  git cherry-pick from
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  r1461739 | dkulp | 2013-03-27 13:47:29 -0400 (Wed, 27 Mar 2013) | 2 lines

  Output a better "message" into the exception.

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Recording revisions 1461738,1461739 via  git from
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Blocking revisions 1461457 via  git from
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