<html>
    <head>
      <base href="https://bugs.documentfoundation.org/">
    </head>
    <body>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Crash after undo they modifications made by track & changes (document comparison)"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=137869#c11">Comment # 11</a>
              on <a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Crash after undo they modifications made by track & changes (document comparison)"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=137869">bug 137869</a>
              from <span class="vcard"><a class="email" href="mailto:lo_bugs@iseries-guru.com" title="Terrence Enger <lo_bugs@iseries-guru.com>"> <span class="fn">Terrence Enger</span></a>
</span></b>
        <pre>Created <span class=""><a href="https://bugs.documentfoundation.org/attachment.cgi?id=173478" name="attach_173478" title="backtrace on linux">attachment 173478</a> <a href="https://bugs.documentfoundation.org/attachment.cgi?id=173478&action=edit" title="backtrace on linux">[details]</a></span>
backtrace on linux

The interesting part of the backtrace starts at frame #18, where
idx==778, m_nSize==778.

In a local --enable-debug --enable-dbgutil build of commit d95e400b
(2021-06-18), built and running on debian-buster, using the STR from
the bug description, I see a crash in step 5 after the second
<ctrl>+Z.

Final terminal messages are (rewrapped):

    warn:legacy.osl:22417:22417:sw/source/core/access/acccontext.cxx:445:
        fire event for disposed frame?
    warn:legacy.osl:22417:22417:sw/source/core/layout/anchoredobject.cxx:569:
        <SwAnchoredObject::GetObjRectWithSpaces> - cache for object
        rectangle inclusive spaces marked as valid, but it couldn't
        be. Missing invalidation of cache.
    warn:sw.core:22417:22417:sw/source/core/docnode/node.cxx:1980:
        Wrong cond collection, skipping check of Cond Colls.
    warn:sw.core:22417:22417:sw/source/core/docnode/node.cxx:1980:
        Wrong cond collection, skipping check of Cond Colls.
    warn:legacy.osl:22417:22417:sw/source/core/access/acccontext.cxx:445:
        fire event for disposed frame?
    warn:legacy.osl:22417:22417:sw/source/core/access/acccontext.cxx:445:
        fire event for disposed frame?
    soffice.bin:
        /home/terry/lo_hacking/git/libo6/sw/source/core/bastyp/bparr.cxx:84:
        BigPtrEntry* BigPtrArray::operator[](sal_uLong) const:
        Assertion `idx < m_nSize' failed.
    Unspecified Application Error

I am setting status NEW.</pre>
        </div>
      </p>


      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>