[Webkit-unassigned] [Bug 146246] New: Empty gtk-font-name setting causes WebProcess crash rendering pages

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146246

            Bug ID: 146246
           Summary: Empty gtk-font-name setting causes WebProcess crash
                    rendering pages
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mod-wkbz at mt2015.com

Created attachment 255428
  --> https://bugs.webkit.org/attachment.cgi?id=255428&action=review
backtrace with symbols

On my Arch Linux x86_64 system, I don't have gconf/dconf/gnome-settings-daemon installed and have "gtk-font-name=" (with no value after the equals sign) under "[Settings]" in ~/.config/gtk-3.0/settings.ini. This configuration causes WebKit2's WebProcess to crash in WebCore::CSSParser::parseSystemFont with the attached backtrace, and prevents effectively all pages from being successfully rendered.

This occurs with both the packaged webkit2gtk 2.8.3-1 in the Arch repositories and with a freshly-built WebKit2GTK+ 2.8.3 from the same sources.

I debugged this in #webkitgtk+ IRC with mcatanzaro, who was able to reproduce by "[setting] org.gnome.desktop.font-name to an empty string with dconf-editor".

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