[Libreoffice-bugs] [Bug 123046] New: Undo sequence causes Impress to freeze

Wed Jan 30 02:31:20 UTC 2019

https://bugs.documentfoundation.org/show_bug.cgi?id=123046

            Bug ID: 123046
           Summary: Undo sequence causes Impress to freeze
           Product: LibreOffice
           Version: 6.1.4.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: rfgiusti at gmail.com

Description:
Impress freezes on certain sequences of undo involving nested items and slide
pasting, taking 100% CPU and requiring to be killed.

Steps to Reproduce:
1. Start a new presentation with blank theme
2. Insert a new slide
3. Click where instructed to add text
4. Input a one-word item and a nested one-word item
5. Select this slide on the slides list, copy and paste
6. On the pasted slide, click on the text area, select all text, and replace it
with a single item
7. In rapid succession, press CTRL+Z twice

Actual Results:
Impress freezes, takes 100% CPU, and stays frozen for minutes, eventually
requiring to be killed.

Expected Results:
The first undo should give you two nested items, the second should remove the
pasted slide

Reproducible: Always

User Profile Reset: No

Additional Info:
The bug is reproducible even in safe mode. I am note sure I properly managed to
reset my profile. However I was able to reproduce for a freshly created user.

This seems to happen only when the user launching LibreOffice is the same user
who started the session. That is, launching LO for a different user from the
terminal does not seem to reproduce the bug.

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