[Libreoffice-bugs] [Bug 127134] New: Dotted lines in tables makes LibreOffice freeze when showed in print preview.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127134

            Bug ID: 127134
           Summary: Dotted lines in tables makes LibreOffice freeze when
                    showed in print preview.
           Product: LibreOffice
           Version: 6.2.0.0.alpha0+
          Hardware: Other
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: Marceaux at zonnet.nl

Description:
I've noticed this behaviour since LibreOffice 6.2: In LibreOffice Calc, when I
create a table with dotted lines in the cells, and you want to see a print
preview of this, the build-up of this print preview screen gets stuck in an
infinite loop, freezes LibreOffice and takes up 100% CPU. This is NOT the case
when you use normal lines without dots.

I've seen this behaviour under LibreOffice in Linux distro's (Manjaro 18.0.4
Xfce, Ubuntu 16.04 LTS and Xubuntu 18.04 LTS). I tried to duplicate this
behaviour also under Windows 7. Under that platform the dotted lines scenario
builds the table up slowly, but after two hiccups it's shown properly.

On both Linux and Windows, OpenGL is disabled. This behaviour is reproduced on
both x86 and x86_64 machines.

Steps to Reproduce:
1. Start LibreOffice Calc
2. Create a Calc-document
3. Within that document, create a table with dotted lines
4. In the menu, go to "File" > "Print preview"

Actual Results:
The image gets in an infinite loop, LibreOffice freezes and CPU goes to 100%.

Expected Results:
Builds up the table to be shown as print preview without the as above described
behaviour.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
I'm not shure if this behaviour was already present in previous versions of
LibreOffice. I can't reproduce this, because I don't run LibreOffice 6.1 and
before on any computer anymore. I've noticed this since LibreOffice 6.2.

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