1280311 - Disabling "gfx.font_rendering.fontconfig.fontlist.enabled" makes Firefox crash on pages containing MathJax equations

Status: RESOLVED DUPLICATE of bug 1266341

(Core :: Graphics: Text, defect)

Description

[micheleguerinirocco]

User Agent: Mozilla/5.0 (GNU/Linux) Gecko/20100101 Firefox/48.0
Build ID: 20160608160037

Steps to reproduce:

1. run firefox -P and create a new profile,
2. set gfx.font_rendering.fontconfig.fontlist.enabled=false
3. restart Firefox
4. go to http://www.mathjax.org/


Actual results:

Firefox segfaults and it's terminated by a SIGSEGV


Expected results:

Firefox should have happily loaded the website

Comment 1

[Loic]

I tried with FF48 on Win 7, I can't reproducethe crash. Do you have a crash report in about:crashes or a stacktrace?

Comment 2

[micheleguerinirocco]

Sorry, the user agent is unrelated: I'm actually running Firefox 47 but this has been happening since version 46 or even earlier.
The crash reporter has been disabled in my distro package. I'm rebuilding Firefox now.

Comment 3

[micheleguerinirocco]

I couldn't make it to submit the crash report due to a missing dependency but I uploaded it here: https://gist.github.com/rnhmjoj/fd37e8afbda9ff96ca363f32a566b01f

Comment 4

[Milan Sreckovic [:milan] (needinfo for best results)]

A regression range would be great.

Comment 5

[Alice0775 White]

Firefo47 crashes : bp-ac0287e0-e4ce-4174-ae95-238c92160618
But Beta48b1 did not crash.
So, this seems to be duplication of Bug 1266341.

@reporter, 
Could you test this with [1]Beta48b1?

[1] https://www.mozilla.org/en-US/firefox/channel/

Comment 6

[micheleguerinirocco]

Yes, that's it. It no longer crashes in 48.0b1.