https://bugs.documentfoundation.org/show_bug.cgi?id=147131
Bug ID: 147131
Summary: A simple table in a table causes freezes; and cells or
cells' contents disappear/reappear on scrolling
Product: LibreOffice
Version: 7.2.5.2 release
Hardware: x86-64 (AMD64)
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: [email protected]
Reporter: [email protected]
Description:
I tried 7.2.5 on Windows 8 x64.
I tried 7.3.0.2 on Windows 8 x64.
I tried 7.2.5 on Arch Linux with hw accel enabled and disabled (I didn't forget
to restart).
This happens with the attached file that was created on 7.2.5 on Windows 8 x64.
By the way, I removed most text (and all images) in the file (originally it had
11 pages).
Steps to Reproduce:
Open the attached file.
Then do one or several actions inside the outer table's right column:
* Try selecting cells in the empty row that is surround by filled cells.
* Try pressing Left/Right key or writing in the cells in the empty row that is
surround by filled cells.
* Try editing the cells in first row.
* Scroll.
* Move your mouse while those empty cells are focused.
How to reproduce creating such file... I don't know. I think LibreOffice
doesn't like tables in tables being spanned over multiple pages. Because the
previous file also had such big tables in tables (IIRC I solved it by deleting
the table).. But there were no problems with 50 previous files (10-20 pages
each) that had tables in tables.
Actual Results:
(I am talking only about the inner table)
When I edit the first row, the empty row that is surrounded by filled cells is
disappearing.
When I just scroll, the cells in the first two columns become empty. If scroll
again, they become visible.
When I try to do anything with the empty cells of the row that is surrounded by
filled cells, CPU usage becomes very high: on the very weak PC with Windows 8,
LibreOffice is frozen for 10 secs when I press e.g. "Left".
If a filled cell is focused, but I move my mouse on the empty cells, then CPU
usage is 100% for a few seconds.
But if the central (2nd) cell of that row is focused, then CPU usage is 100%
forever without me doing anything. Infinite loop? But if I select another cell,
then CPU usage is back to 0%.
Expected Results:
CPU usage 0% and no Schrödinger's cells even if a file is corrupted.
No such files created in case it's a corruption.
Reproducible: Always
User Profile Reset: Yes
Additional Info:
If I try to open the attached file with CoolReader 3.2.59, then all cells are
empty, and "Block 16:0 not found in file" in the log.
On Arch Linux:
Version: 7.2.5.2.0+ / LibreOffice Community
Build ID: 20(Build:2)
CPU threads: 12; OS: Linux 5.16; UI render: default; VCL: gtk3
Locale: it-IT (it_IT.utf8); UI: en-US
7.2.5-4
Calc: threaded
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