[Libreoffice-bugs] [Bug 127344] Idle LibreOffice consumes 100% CPU on i386

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127344

--- Comment #11 from Albrecht Dreß <albrecht.dress at arcor.de> ---
Created attachment 160609
  --> https://bugs.documentfoundation.org/attachment.cgi?id=160609&action=edit
test LibreOffice 6.4.3 from Debian Buster backports on i386

I installed the latest packages, including the dbgsyms for core, writer and
gtk3, from Debian buster backports on a Virtualbox 32 bit VM, running the
latest buster with all updates (see file packages.log in the attached package).

Then I cleared the user config, launched the writer from the XFCE menu, and
waited ~10 minutes until the one cpu (out of 2) went to 100%.  Then I opened
gdb:

| test at debian32:~$ rm -rf .config/libreoffice/
| [launch LO writer from the XFCE menu]
| [wait until the cpu goes to 100%]
| gdb /usr/lib/libreoffice/program/soffice.bin

Htop reports a bunch of threads related to pid 1244, of which “soffice.bin”
comsumes 100% cpu (see top.log).

Running perf on pid 1244 results in the attached perf-report.log.

In gdb, I attached to pid 1244, listed the threads, and a few times interrupted
thread “soffice.bin” go get the bt (gdb.log).

Please let me know if you need more information.

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