[Libreoffice-bugs] [Bug 136409] New: Writer crashes with large file

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=136409

            Bug ID: 136409
           Summary: Writer crashes with large file
           Product: LibreOffice
           Version: 7.0.0.3 release
          Hardware: All
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: christianw_lehmann at arcor.de

Description:
Writer crashes with large file
I had earlier (January 2019) submitted the odt file I have been working on for
the past years, using various versions of LO 6 and now LO 7 and with various
Ubuntu 18.04 desktops, including Unity, KDE, Openbox and now Ubuntu default. In
all of these configurations, I have been confronted with repeated freezes of
LO. I cannot count how many of the automatic crash reports I have released over
the years. The situation has not improved in the least.
There is no particular action within LO Writer that conditions the freeze.
Sometimes it freezes when left alone.

Ubuntu then sometimes pops up a message saying that LO is not responding,
leaving me with the choice of stopping the task or waiting. If I stop it, what
follows runs as expected. If I choose ‘Wait’, then the entire Linux session
freezes, and I have to restart the computer.

I have 8 GB RAM and a hard disk drive with sufficient free space for virtual
memory. The odt file (an earlier version of which you have; see above) is now
1,2 MiB in its packed form and 12,6 MiB if unpacked (fodt).

As far as I can tell, there are two possible sources for the regular
breakdowns:
1) The fodt file is way too large because there is insufficient formatting
management. For instance, I can see many redundancies in it: A paragraph
template is specified for all italics, and some word contained in it is
specified for italics, in addition. This happens because strings are copied
including their formatting information without respecting the target context, a
bug that I reported long ago. And there are many more redundancies and
inconsistencies. If LO cannot avoid the creation of these while the document is
being edited, then it should have a file repair function (do I need to mention
MS Office?) which corrects, purifies and condenses a file.

2) The second possible problem is memory management. If loaded into LO Writer,
the Ubuntu Task Manager tells me that soffice.bin occupies 612,9 MB “Resident
Set Size” and 6,3 GB “Virtual Memory Size”. Without being a specialist in
memory allocation, this seems pretty much to me. If LO has the entire machine
for itself, it is, nevertheless, usually stable. As soon as other applications
(e.g., Thunderbird or Firefox) are running simultaneously, breakdown threatens.

Maybe on the basis of all those crash reports sent over the years (should I
reveal my IP address?) and the present problem description, someone could take
care of this rather serious bug.


Steps to Reproduce:
1. Load the file I sent in January 2019.
2. Load other applications.
3. Wait.

Actual Results:
First LO Writer freezes. Then Ubuntu freezes as specified in the description.

Expected Results:
Writer should be stable.


Reproducible: Always


User Profile Reset: No



Additional Info:
My most recent installation is only a week old. Resetting the profile would not
make any difference.
There is, in version 7, no 'Use OpenGL' option in the preferences.

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