Firefox + SeaMonkey (gecko browsers) instant crash on some web pages

[Steve Wills]

Just to test, try setting gfx.canvas.azure.backends and
gfx.content.azure.backends to skia in about:config and see if it still
crashes.

Steve

On 10/08/2015 11:53, Steve Wills wrote:
> Hi,
> 
> On 10/08/2015 10:25, Miroslav Lachman wrote:
>> Walter Schwarzenfeld wrote on 10/07/2015 00:35:
>>> Firefox 41.0.1 is out, give it a try.
>>
>>
>>
>> I tried it in VirtualBox - same crash as with older versions.
>>
>> In real host I got this (started ff from command line)
>>
>>> firefox
>>
>> (process:77500): GLib-CRITICAL **: g_slice_set_config: assertion
>> 'sys_page_size == 0' failed
>> Assertion failed: (!scaled_font->cache_frozen), function
>> _cairo_scaled_glyph_page_destroy, file cairo-scaled-font.c, line 459.
>> Abort
>>
>>
>> In VirtualBox on FreeBSD 10.2 with Firefox 41
>>
>>> firefox
>>
>> (process:5471): GLib-CRITICAL **: g_slice_set_config: assertion
>> 'sys_page_size == 0' failed
>> Fontconfig warning: "local.conf", line 1093: saw number, expected matrix
>> libGL error: Calling driver entry point failed
>> libGL error: reverting to software direct rendering
>> libGL error: failed to load driver: vboxvideo
>> ATTENTION: default value of option force_s3tc_enable overridden by
>> environment.
>> Assertion failed: (!scaled_font->cache_frozen), function
>> _cairo_scaled_glyph_page_destroy, file cairo-scaled-font.c, line 459.
>> Redirecting call to abort() to mozalloc_abort
>>
>> Segmentation fault
>>
>>
>> First line with GLib-CRITICAL is shown on Firefox startup and is not
>> related to crash on www.mapy.cz
>>
>> The "cairo scaled" error is something I saw in the past with some other
>> software, like GIMP or Avidemux. GIMP and Avidemux are not able to even
>> start on my computer if I have Helvetica as system default font.
>> Firefox and Seamonkey works fine until I need to open www.seznam.cz,
>> www.mapy.cz and other websites from this company.
>>
>> I tried it on host with differen font (Arial) and Firefox crashed again.
>>
>>> firefox
>>
>> (process:79336): GLib-CRITICAL **: g_slice_set_config: assertion
>> 'sys_page_size == 0' failed
>> Assertion failed: (!scaled_font->cache_frozen), function
>> _cairo_scaled_glyph_page_destroy, file cairo-scaled-font.c, line 459.
>> Redirecting call to abort() to mozalloc_abort
>>
>>
>> ###!!! [Parent][MessageChannel] Error: Channel error: cannot send/recv
>>
>> Assertion failed: (!scaled_font->cache_frozen), function
>> _cairo_scaled_glyph_page_destroy, file cairo-scaled-font.c, line 459.
>> Abort
>>
>> So the crash is not related to choosen default font.
>>
> 
> I was able to trigger the issue on www.seznam.cz only. I'll look into as
> much as I can.
> 
> Steve
> 
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