Resolves: rhbz#963276 rhbz#761009 lp#766153 lp#892904 HandleFontOptions crash

The mpServerFont member of a ImplServerFontEntry must not be deleted while the
ImplServerFontEntry still exists

see also 39cbce553da1834f78b77f48b2f1be9578d6cc05 for another reason a crash in
the same place can happen.  Its impossible from traces in crashes before
39cbce553da1834f78b77f48b2f1be9578d6cc05 was fixed to distinguish those crashes
from this crash.

This crash is a regression due to 7a416820ab5e03f8b988656e0f6a592cb1e81d07
where we went from modifying pServerFont in X11SalGraphics::setFont directly to
modifying it/a-different-one indirectly via ImplServerFontEntry

The various font caches and font thing lifecycles of LibreOffice are somewhat
confusing.

This crash had eluded me for years, to reproduce:
insert->special chars->select a font with loads of glyphs, i.e. "AR PL UKai CN"
click on the first row of glyphs and hold down page-down until you hit the
bottom, then page-up until you hit the top. Pre patch it won't survive the
whole down+up (and valgrind will moan quite a bit)

(cherry picked from commit 3d6424a752902bba513102834966868f609d91e6)

Change-Id: Ifde0cb375f487c556b04a640d77765a7dc2f0913
Reviewed-on: https://gerrit.libreoffice.org/3922
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

0 files changed, 0 insertions, 0 deletions