[Webkit-unassigned] [Bug 156972] New: [GTK] Crashes if DISPLAY is unset

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156972

            Bug ID: 156972
           Summary: [GTK] Crashes if DISPLAY is unset
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: berto at igalia.com
                CC: bugs-noreply at webkitgtk.org

This happens when the gtk-doc scanner is linked against webkit2gtk:

gtkdoc-scangobj  $scanobj_options --module=libyelp

(process:14998): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed

** (process:14998): WARNING **: Unable to connect to dbus: Cannot autolaunch D-Bus without X11 $DISPLAY
Segmentation fault

The segfault comes from webkitgtk:

(gdb) bt
#0  XCloseDisplay (dpy=0x0) at ../../src/ClDisplay.c:51
#1  0x00007ffff4eab831 in WebCore::PlatformDisplayX11::~PlatformDisplayX11 (this=0x7fffe2dfc028, __in_chrg=<optimized out>)
    at /build/webkit2gtk-ea7lQt/webkit2gtk-2.12.1/Source/WebCore/platform/graphics/x11/PlatformDisplayX11.cpp:53

The problem seems to be that m_display is initialized in the constructor of PlatformDisplayX11, but it's assumed not to be NULL.

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