In https://reviewboard.mozilla.org/r/43385/diff/3-4/ the following error is displayed: There was an error displaying this diff. Internal error. Unable to locate file record for filediff 796631 This may be a bug in the software, a temporary outage, or an issue with the format of your diff. Please try again, and if you still have trouble, contact support. Two things of note: 1. This file was moved and edited in the same commit. 2. It doesn't look like it was actually changed between revisions 3 and 4, although maybe there was a rebase.
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