[Libreoffice-bugs] [Bug 106265] Scrolling font list with previews enabled makes LO crash

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=106265

--- Comment #39 from Markus Mohrhard <markus.mohrhard at googlemail.com> ---
(In reply to V Stuart Foote from comment #36)
> Created attachment 132998 [details]
> WinDbg 64 stack trace of 5.3.2.2 and WinDbg 32 stack trace for TB39 master
> 
> Testing this on a Windows 8.1 Ent 64-bit system with nVidia GPU and ~1115
> installed fonts set active with 
> Version: 5.3.2.2 (x64)
> Build ID: 6cd4f1ef626f15116896b1d8e1398b56da0d0ee1
> CPU Threads: 8; OS Version: Windows 6.29; UI Render: GL; Layout Engine: new; 
> Locale: en-US (en_US); Calc: group
> 
> STR
> 
> 1. Open Writer
> 2. Formatting Toolbar -> Font Name box drop list
> 3. Scroll up and down the list
> 4. The previews are rendered correctly
> 5. continue scroll up and down until preview become garbled
> 6. continue to scroll up and down and crash
> 
> Recover and crash report against
> http://crashreport.libreoffice.org/stats/signature/SalFrame::SetCallback(vcl:
> :Window%20*,bool%20(*)(vcl::Window%20*,SalEvent,void%20const%20*))
> 
> crashreport.libreoffice.org/stats/crash_details/4150ed68-d6bb-44d2-89f0-
> 0dede76e1eb6
> 
> crashreport.libreoffice.org/stats/crash_details/4deecd40-226e-480b-ae04-
> f58ae779a503
> 
> Also tested same system with Version: 5.4.0.0.alpha1+
> Build ID: c454fbb9b62164d5f047990ae63522c9fb932086
> CPU threads: 8; OS: Windows 6.29; UI render: GL; 
> TinderBox: Win-x86 at 39, Branch:master, Time: 2017-05-01_04:48:39
> Locale: en-US (en_US); Calc: CL
> 
> With 32-bit WinDbg attached while scrolling the Font Name box drop list
> preview also crash. Stack Trace attached.


The stacktrace is not important for this issue. It is a resource leak where we
run out of GDI handles and hit the windows process limit of 10k GDI handles.

However your instructions are quite valuable and I will see if I can reproduce
it with them. If I understand the comments correctly and this is really related
to OpenGL we seem to be leaking GDI handles somewhere in the OpenGL font
rendering code.

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