https://bugs.documentfoundation.org/show_bug.cgi?id=161267
Bug ID: 161267
Summary: accidental REPEAT on large selection -> 100% cpu +
data loss
Product: LibreOffice
Version: 24.8.0.0 alpha0+
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Calc
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: p...@pfortin.com
using Calc to summarize data in a PostgreSQL table containing 17,071,231
records with 67 fields. Only 54 fields are of interest for this analysis which
consists of executing this SQL query:
select fld, count(fld) from table group by fld order by fld;
This gives me 2 columns like this example:
ALAMANCE 236445
ALEXANDER 57281
ALLEGHANY 18589
ANSON 36426
ASHE 46159
AVERY 28783
BEAUFORT 79544
BERTIE 29424
which I copy/paste into a new sheet renamed to match the field name.
I have F3 in LO set to REPEAT the last action.
After collecting much data, it's time to add analysis: using the above example,
I change the first row to:
ALAMANCE 236445 =len(A1) =B1*C1
To save time, I make extensive use of F3(REPEAT) like these actions:
* copy C1-D1, switch to next sheet, paste into C1-D1, next sheet, REPEAT...
* back to initial sheet, add a row above row 1, next sheet, row 1, REPEAT...
If you are picturing this activity, you can see how this approach can proceed
quite fast...
One time, I missed and clicked on the column rather than the top cell; REPEAT
proceeded to paste into the entire column (16M rows) -- 100% CPU, Calc just
died.
Restart Calc & recovered 7 documents; but not this document. Open Recent
recovered to the last save.
Repeated the lost steps.
* initial sheet, add column header labels, copy row, next sheet, paste, REPEAT.
After adding headers to about 1/2 the sheets, instead of clicking on row 1, hit
the area just above + F3 which proceeded to paste into the entire sheet -> 100%
CPU. Got "Not responding". xkill had no effect on the window (never saw that
before). Tried Close button which gave me the terminate dialog.
Build:
https://gerrit.libreoffice.org/gitweb?p=core.git;a=log;h=5ff701226b00963312cb2a78e77966d012b79c82
Operating System: Mageia 10
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.6.2
Kernel Version: 6.6.28-server-1.mga10 (64-bit)
Graphics Platform: Wayland
Processors: 20 × 12th Gen Intel® Core™ i7-12700K
Memory: 125.5 GiB of RAM
Graphics Processor: AMD Radeon RX 6600 XT
Manufacturer: Dell Inc.
Product Name: XPS 8950
Maybe there should be a quick sanity check when something like Paste to ALL
(column, row, sheet) could cause aggravation and data loss giving LO a bad
reputation with the user. Hitting this flaw which results in data loss and
wasted time twice within about 15-20 minutes was frustrating. Just saying...
:)
Hopefully, the above is clear enough to build a test case.
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