[Webkit-unassigned] [Bug 209431] New: [GTK] [2.28.0] The Yelp build crashes if DISPLAY is not set

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209431

            Bug ID: 209431
           Summary: [GTK] [2.28.0] The Yelp build crashes if DISPLAY is
                    not set
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: berto at igalia.com
                CC: bugs-noreply at webkitgtk.org

It seems that it's impossible to build Yelp (which links against WebKitGTK) if DISPLAY is unset:

Gtk-CRITICAL **: 18:22:42.130: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
WARNING **: 18:22:42.132: Unable to connect to dbus: Cannot autolaunch D-Bus without X11 $DISPLAY
Unable to init server: Could not connect: Connection refused

I don't have a full backtrace with all symbols but this one already points at the problem:

Thread 1 "libyelp-scan" received signal SIGABRT, Aborted.
0x00007ffff7c56761 in raise () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x00007ffff7c56761 in raise () at /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff7c4055b in abort () at /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007ffff4ba02ed in  () at /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#3  0x00007ffff507079b in WebKit::HardwareAccelerationManager::HardwareAccelerationManager() () at ../Source/WebKit/UIProcess/gtk/HardwareAccelerationManager.cpp:55
#4  0x00007ffff507081c in WTF::NeverDestroyed<WebKit::HardwareAccelerationManager>::NeverDestroyed<>() () at DerivedSources/ForwardingHeaders/wtf/NeverDestroyed.h:52
#5  WebKit::HardwareAccelerationManager::singleton() () at ../Source/WebKit/UIProcess/gtk/HardwareAccelerationManager.cpp:36
#6  0x00007ffff50786d9 in WebKit::WebPreferences::platformInitializeStore() () at ../Source/WebKit/UIProcess/gtk/WebPreferencesGtk.cpp:42
#7  0x00007ffff4eea222 in WebKit::WebPreferences::create(WTF::String const&, WTF::String const&, WTF::String const&) () at ../Source/WebKit/UIProcess/WebPreferences.cpp:45
#8  0x00007ffff4fbb101 in _WebKitSettingsPrivate::_WebKitSettingsPrivate() () at ../Source/WebKit/UIProcess/API/glib/WebKitSettings.cpp:59
#9  0x00007ffff7fa8e6d in g_type_create_instance () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007ffff7f886dd in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#11 0x00007ffff7f8a5e9 in g_object_new_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#12 0x00007ffff4fb5588 in webkit_settings_new_with_settings() () at ../Source/WebKit/UIProcess/API/glib/WebKitSettings.cpp:1577
#13 0x00007ffff7e32726 in yelp_view_get_global_settings () at libyelp/yelp-view.c:153
#14 0x00007ffff7e3274d in settings_show_text_cursor (settings=settings at entry=0x5555555b8150) at libyelp/yelp-view.c:2094
#15 0x00007ffff7e327e3 in yelp_view_class_init (klass=0x5555555b6520) at libyelp/yelp-view.c:465
#16 yelp_view_class_intern_init (klass=0x5555555b6520) at libyelp/yelp-view.c:144
#17 0x00007ffff7fa6ef1 in g_type_class_ref () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#18 0x00005555555565bc in get_object_types () at libyelp-scan.c:62
#19 main () at libyelp-scan.c:113

That's here:

    if (!AcceleratedBackingStore::checkRequirements()) {
        m_canUseHardwareAcceleration = false;
        return;
    }

See also bug 156972 for a related problem already fixed 4 years ago.

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