[Issue 127803] attempt to link documents circularly freezes writer

[bu...@apache.org]

https://bz.apache.org/ooo/show_bug.cgi?id=127803

Matt <ma...@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |matt.dekenah@gmail.com

--- Comment #3 from Matt <ma...@gmail.com> ---
Created attachment 86679
  --> https://bz.apache.org/ooo/attachment.cgi?id=86679&action=edit
Screenshot showing OpenOffice CPU usage upon circular reference freeze


I have been able to replicate the issue as described on MacOS 10.14.4 and
OpenOffice AOO416m1(Build:9790), Rev. 1844436, however, I have also seen a
related issue where Writer actually crashes if both documents are open when the
circular reference is inserted. See below.

Replication steps:
1. Create new Writer document.
2. Save to disk as e.g. Doc01.odt.
3. Create another new Writer document.
4. Save to disk as e.g. Doc02.odt.
5. Return to/open the first document.
6. Insert > Section...
7. Check the 'Link' checkbox and use the browse feature to select the second
document.
8. Save then close the first document.
9. Open the second document.
10. Insert > Section...
11. Check the 'Link' checkbox and use the browse feature to select the first
document.
12. Click 'Insert'.

At this point by monitoring OpenOffice in MacOS Activity Monitor I saw the CPU
usage increase dramatically and Writer become unresponsive (see attached
screenshot). Memory usage also began to increase exponentially.

I also attempted to alternative steps where I did not close the first document
at step 8. On my OS (see configuration details below), this resulted in a crash
of OpenOffice instead of OO becoming unresponsive and consuming more resources.
I will attach the crash report as a second comment.

(After the program crash or force quit, OpenOffice offered to recover the
document(s) and did so successfully.)

Configuration:
macOS 10.14.4 (18E227)
Model Identifier: MacBookPro15,2
Processor Name: Intel Core i7
Processor Speed: 2.7 GHz
RAM: 16GB

OpenOffice Version: 
AOO416m1(Build:9790)  -  Rev. 1844436
2018-10-22 14:11:36 (Mon, 22 Oct 2018) - Darwin x86_64

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