https://issues.apache.org/ooo/show_bug.cgi?id=121452

            Bug ID: 121452
        Issue Type: DEFECT
           Summary: Replication of frames with "record/track changes"
                    (redlines), Writer freezes
    Classification: Application
           Product: word processor
           Version: AOO 3.4.1
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: editing
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]

When using "Record changes", Writer sometimes starts continuous replication of
frames. After it has produced several thousand copies of the same frame, it
usually freezes at some stage with 100% CPU usage, and you have to kill the
process.

If you kill it fast enough after it becomes unresponsive, you can continue with
the last auto-saved version of the document. If an auto-save happens after
replication has started, there remains only the solution of hand-editing the
content.xml: You have to find the frame that gets repeated both in the
<text:tracked-changes> section and in one of the following <text:p> elements,
and delete all instances. Writer seems to endlessly put the frame in question
into the <text:deletion> element and copy it into the text paragraph (or vice
versa).

It is very difficult to track down the bug because you may be editing a
different part of the file when Writer starts replication. But I believe that
it concerns frames that get deleted while "Record changes" is active. I have
managed to avoid this bug with good success by turning "Record changes" off
whenever possible and by postponing using frames until recorded changes are
accepted.

I will add some sample documents that are also available from the equivalent
LibreOffice bug report (#fdo50057)
https://bugs.freedesktop.org/show_bug.cgi?id=50057

Also see Bug 75680 Comment 5, which seems to address the same problem. I'm not
sure if Bug 75680 Comment 3 about alphabetic-index-marks in the deletion
redline is related to the same bug.

Saw this bug in OpenOffice under Ubuntu 9 and 10, and in OpenOffice (and
LibreOffice) under Ubuntu 12.04. Also confirmed in LibreOffice BZ under Windows
7. Now tested with AOO 3.4.1 (under Ubuntu 12.04/AMD64).

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