Bug 188305

Summary: [GTK] Never return an uninitialized ImageGStreamer object.
Product: WebKit Reporter: Ms2ger (he/him; ⌚ UTC+1/+2) <Ms2ger>
Component: MediaAssignee: Ms2ger (he/him; ⌚ UTC+1/+2) <Ms2ger>
Status: RESOLVED FIXED    
Severity: Normal CC: bugs-noreply, commit-queue, csaavedra, ews-watchlist, pnormand, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 188780    
Bug Blocks:    
Attachments:
Description Flags
Patch
none
Archive of layout-test-results from ews205 for win-future
none
Patch none

Description Ms2ger (he/him; ⌚ UTC+1/+2) 2018-08-03 06:48:00 PDT 
#0  0x00007fb71e8591e8 in WTFCrash () at /home/slave/webkitgtk/gtk-linux-64-debug/build/Source/WTF/wtf/Assertions.cpp:267
#1  0x00007fb72b4984be in (anonymous namespace)::ImageGStreamer::image (this=0x7fb6c6161b80) at /home/slave/webkitgtk/gtk-linux-64-debug/build/Source/WebCore/platform/graphics/gstreamer/ImageGStreamer.h:49
#2  0x00007fb72b493c4e in (anonymous namespace)::MediaPlayerPrivateGStreamerBase::paint (this=0x7fb66e951a80, context=..., rect=...) at /home/slave/webkitgtk/gtk-linux-64-debug/build/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp:918
#3  0x00007fb72abb4c1d in (anonymous namespace)::MediaPlayerPrivateInterface::paintCurrentFrameInContext (this=0x7fb66e951a80, c=..., r=...) at ../../Source/WebCore/platform/graphics/MediaPlayerPrivate.h:148
#4  0x00007fb72abaa044 in (anonymous namespace)::MediaPlayer::paintCurrentFrameInContext (this=0x7fb6900b1438, p=..., r=...) at ../../Source/WebCore/platform/graphics/MediaPlayer.cpp:886
#5  0x00007fb72a56d98a in (anonymous namespace)::HTMLVideoElement::paintCurrentFrameInContext (this=0x7fb630a007a8, context=..., destRect=...) at ../../Source/WebCore/html/HTMLVideoElement.cpp:293
#6  0x00007fb72a5cc785 in (anonymous namespace)::CanvasRenderingContext2DBase::createPattern (this=0x7fb70f9208c0, videoElement=..., repeatX=true, repeatY=true) at ../../Source/WebCore/html/canvas/CanvasRenderingContext2DBase.cpp:1976
#7  0x00007fb72a5d17cd in (anonymous namespace)::CanvasRenderingContext2DBase::<lambda(auto:14&)>::operator()<WTF::RefPtr<WebCore::HTMLVideoElement> >(WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> > &) const (__closure=0x7ffc691290f0, element=...) at ../../Source/WebCore/html/canvas/CanvasRenderingContext2DBase.cpp:1920
#8  0x00007fb72a5d09a7 in WTF::__visitor_table<WTF::Visitor<WebCore::CanvasRenderingContext2DBase::createPattern(WebCore::CanvasImageSource&&, const WTF::String&)::<lambda(auto:14&)> >, WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > >::__trampoline_func<WTF::RefPtr<WebCore::HTMLVideoElement> >(WTF::Visitor<WebCore::CanvasRenderingContext2DBase::createPattern(WebCore::CanvasImageSource&&, const WTF::String&)::<lambda(auto:14&)> > &, WTF::__visitor_table<WTF::Visitor<WebCore::CanvasRenderingContext2DBase::createPattern(WebCore::CanvasImageSource&&, const WTF::String&)::<lambda(auto:14&)> >, WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > >::__variant_type &) (__visitor=..., __v=...) at DerivedSources/ForwardingHeaders/wtf/Variant.h:1868
#9  0x00007fb72a5cf7d1 in WTF::visit<WTF::Visitor<WebCore::CanvasRenderingContext2DBase::createPattern(WebCore::CanvasImageSource&&, const WTF::String&)::<lambda(auto:14&)> >, WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > >(<unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2bec59>, WTF::Variant<WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > > &) (__visitor=<unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2bec59>, __v=...) at DerivedSources/ForwardingHeaders/wtf/Variant.h:1884
#10 0x00007fb72a5cf839 in WTF::switchOn<WTF::Variant<WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > >&, WebCore::CanvasRenderingContext2DBase::createPattern(WebCore::CanvasImageSource&&, const WTF::String&)::<lambda(auto:14&)> >(WTF::Variant<WTF::RefPtr<WebCore::HTMLImageElement, WTF::DumbPtrTraits<WebCore::HTMLImageElement> >, WTF::RefPtr<WebCore::HTMLVideoElement, WTF::DumbPtrTraits<WebCore::HTMLVideoElement> >, WTF::RefPtr<WebCore::HTMLCanvasElement, WTF::DumbPtrTraits<WebCore::HTMLCanvasElement> >, WTF::RefPtr<WebCore::ImageBitmap, WTF::DumbPtrTraits<WebCore::ImageBitmap> > > &, <unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2bec4c>) (v=..., f#0=<unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2bec4c>) at DerivedSources/ForwardingHeaders/wtf/Variant.h:2049
#11 0x00007fb72a5cc22b in (anonymous namespace)::CanvasRenderingContext2DBase::createPattern(<unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2a8062>, const WTF::String &) (this=0x7fb70f9208c0, image=<unknown type in /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37, CU 0x0, DIE 0x2a8062>, repetition="repeat") at ../../Source/WebCore/html/canvas/CanvasRenderingContext2DBase.cpp:1921
#12 0x00007fb72b5d687e in (anonymous namespace)::jsCanvasRenderingContext2DPrototypeFunctionCreatePatternBody (state=0x7ffc69129310, castedThis=0x7fb6ae965f00, throwScope=...) at DerivedSources/WebCore/JSCanvasRenderingContext2D.cpp:2489
#13 0x00007fb72b5e359c in (anonymous namespace)::IDLOperation<WebCore::JSCanvasRenderingContext2D>::call<WebCore::jsCanvasRenderingContext2DPrototypeFunctionCreatePatternBody> (state=..., operationName=0x7fb72e215ba2 "createPattern") at ../../Source/WebCore/bindings/js/JSDOMOperation.h:53
#14 0x00007fb72b5d6905 in (anonymous namespace)::jsCanvasRenderingContext2DPrototypeFunctionCreatePattern (state=0x7ffc69129310) at DerivedSources/WebCore/JSCanvasRenderingContext2D.cpp:2494
#15 0x00007fb6c82a3177 in ?? ()
#16 0x00007ffc691293a0 in ?? ()
#17 0x00007fb71e2ddde6 in llint_entry () at DerivedSources/ForwardingHeaders/wtf/RefPtr.h:79
Comment 1 Philippe Normand 2018-08-03 06:52:43 PDT 
Looks like a similar issue to bug 188162. I suspect the gst video frame map fails in the ImageGStreamerCairo constructor.
Comment 2 Ms2ger (he/him; ⌚ UTC+1/+2) 2018-08-03 06:53:10 PDT 
Created attachment 346478 [details]
Patch
Comment 3 Philippe Normand 2018-08-03 07:23:16 PDT 
Comment on attachment 346478 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=346478&action=review

> Source/WebCore/ChangeLog:3
> +        [GTK] Never return an uninitialized ImageGStreamer object.

This should match the actual bug title in bugzilla.

> Source/WebCore/platform/graphics/gstreamer/ImageGStreamer.h:44
> +            if (!image->m_image)

Nit: Perhaps add and use a new isValid() method?
Comment 4 EWS Watchlist 2018-08-03 12:39:04 PDT 
Comment on attachment 346478 [details]
Patch

Attachment 346478 [details] did not pass win-ews (win):
Output: https://webkit-queues.webkit.org/results/8753481

New failing tests:
imported/blink/transitions/unprefixed-transform.html
legacy-animation-engine/imported/blink/transitions/unprefixed-transform.html
Comment 5 EWS Watchlist 2018-08-03 12:39:15 PDT 
Created attachment 346523 [details]
Archive of layout-test-results from ews205 for win-future

The attached test failures were seen while running run-webkit-tests on the win-ews.
Bot: ews205  Port: win-future  Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit
Comment 6 Philippe Normand 2018-08-17 02:24:24 PDT 
Ms2ger, do you plan to update this patch?
Comment 7 Ms2ger (he/him; ⌚ UTC+1/+2) 2018-08-17 02:30:23 PDT 
(In reply to Philippe Normand from comment #3)
> Comment on attachment 346478 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=346478&action=review
> 
> > Source/WebCore/platform/graphics/gstreamer/ImageGStreamer.h:44
> > +            if (!image->m_image)
> 
> Nit: Perhaps add and use a new isValid() method?

I don't think that's helpful; the point of this patch is to make sure that no object whose isValid() would return false escapes out of createImage(). (It might be better to avoid even creating the object, but that was a bunch more work.)
Comment 8 WebKit Commit Bot 2018-08-17 02:59:47 PDT 
Comment on attachment 346478 [details]
Patch

Clearing flags on attachment: 346478

Committed r234979: <https://trac.webkit.org/changeset/234979>
Comment 9 WebKit Commit Bot 2018-08-17 02:59:48 PDT 
All reviewed patches have been landed.  Closing bug.
Comment 10 Radar WebKit Bug Importer 2018-08-17 03:00:46 PDT 
<rdar://problem/43417149>
Comment 11 Claudio Saavedra 2018-08-20 04:28:47 PDT 
This change broke the build in the Ubuntu LTS bot, here's the relevant part of the build failure:

FAILED: /usr/lib/ccache/clang++   -DBUILDING_GTK__=1 -DBUILDING_WEBKIT -DBUILDING_WITH_CMAKE=1 -DBUILDING_WebCore -DENABLE_OPENTYPE_MATH=1 -DGETTEXT_PACKAGE=\"WebKit2GTK-4.0\" -DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED -DSTATICALLY_LINKED_WITH_PAL=1 -DWEBKITGTK_API_VERSION_STRING=\"4.0\" -I. -I../../Source/WebCore -I../../Source/WebCore/Modules/airplay -I../../Source/WebCore/Modules/beacon -I../../Source/WebCore/Modules/applepay -I../../Source/WebCore/Modules/applepay/paymentrequest -I../../Source/WebCore/Modules/cache -I../../Source/WebCore/Modules/credentialmanagement -I../../Source/WebCore/Modules/encryptedmedia -I../../Source/WebCore/Modules/encryptedmedia/legacy -I../../Source/WebCore/Modules/entriesapi -I../../Source/WebCore/Modules/fetch -I../../Source/WebCore/Modules/geolocation -I../../Source/WebCore/Modules/indexeddb -I../../Source/WebCore/Modules/indexeddb/client -I../../Source/WebCore/Modules/indexeddb/server -I../../Source/WebCore/Modules/indexeddb/shared -I../../Source/WebCore/Modules/mediacapabilities -I../../Source/WebCore/Modules/mediacontrols -I../../Source/WebCore/Modules/mediasession -I../../Source/WebCore/Modules/mediasource -I../../Source/WebCore/Modules/mediastream -I../../Source/WebCore/Modules/navigatorcontentutils -I../../Source/WebCore/Modules/notifications -I../../Source/WebCore/Modules/paymentrequest -I../../Source/WebCore/Modules/plugins -I../../Source/WebCore/Modules/quota -I../../Source/WebCore/Modules/speech -I../../Source/WebCore/Modules/streams -I../../Source/WebCore/Modules/webaudio -I../../Source/WebCore/Modules/webauthn -I../../Source/WebCore/Modules/webdatabase -I../../Source/WebCore/Modules/webdriver -I../../Source/WebCore/Modules/websockets -I../../Source/WebCore/Modules/webvr -I../../Source/WebCore/accessibility -I../../Source/WebCore/animation -I../../Source/WebCore/bindings -I../../Source/WebCore/bindings/js -I../../Source/WebCore/bridge -I../../Source/WebCore/bridge/c -I../../Source/WebCore/bridge/jsc -I../../Source/WebCore/contentextensions -I../../Source/WebCore/crypto -I../../Source/WebCore/crypto/algorithms -I../../Source/WebCore/crypto/keys -I../../Source/WebCore/crypto/parameters -I../../Source/WebCore/css -I../../Source/WebCore/css/parser -I../../Source/WebCore/cssjit -I../../Source/WebCore/dom -I../../Source/WebCore/dom/default -I../../Source/WebCore/dom/messageports -I../../Source/WebCore/domjit -I../../Source/WebCore/editing -I../../Source/WebCore/fileapi -I../../Source/WebCore/history -I../../Source/WebCore/html -I../../Source/WebCore/html/canvas -I../../Source/WebCore/html/forms -I../../Source/WebCore/html/parser -I../../Source/WebCore/html/shadow -I../../Source/WebCore/html/track -I../../Source/WebCore/inspector -I../../Source/WebCore/inspector/agents -I../../Source/WebCore/inspector/agents/page -I../../Source/WebCore/inspector/agents/worker -I../../Source/WebCore/loader -I../../Source/WebCore/loader/appcache -I../../Source/WebCore/loader/archive -I../../Source/WebCore/loader/archive/mhtml -I../../Source/WebCore/loader/cache -I../../Source/WebCore/loader/icon -I../../Source/WebCore/mathml -I../../Source/WebCore/page -I../../Source/WebCore/page/animation -I../../Source/WebCore/page/csp -I../../Source/WebCore/page/scrolling -I../../Source/WebCore/platform -I../../Source/WebCore/platform/animation -I../../Source/WebCore/platform/audio -I../../Source/WebCore/platform/crypto -I../../Source/WebCore/platform/encryptedmedia -I../../Source/WebCore/platform/gamepad -I../../Source/WebCore/platform/graphics -I../../Source/WebCore/platform/graphics/cpu/arm -I../../Source/WebCore/platform/graphics/cpu/arm/filters -I../../Source/WebCore/platform/graphics/displaylists -I../../Source/WebCore/platform/graphics/filters -I../../Source/WebCore/platform/graphics/harfbuzz -I../../Source/WebCore/platform/graphics/harfbuzz/ng -I../../Source/WebCore/platform/graphics/iso -I../../Source/WebCore/platform/graphics/opentype -I../../Source/WebCore/platform/graphics/transforms -I../../Source/WebCore/platform/mediastream -I../../Source/WebCore/platform/mediastream/libwebrtc -I../../Source/WebCore/platform/mock -I../../Source/WebCore/platform/mock/mediasource -I../../Source/WebCore/platform/network -I../../Source/WebCore/platform/sql -I../../Source/WebCore/platform/text -I../../Source/WebCore/platform/text/icu -I../../Source/WebCore/platform/vr -I../../Source/WebCore/plugins -I../../Source/WebCore/rendering -I../../Source/WebCore/rendering/line -I../../Source/WebCore/rendering/mathml -I../../Source/WebCore/rendering/shapes -I../../Source/WebCore/rendering/style -I../../Source/WebCore/rendering/svg -I../../Source/WebCore/rendering/updating -I../../Source/WebCore/replay -I../../Source/WebCore/storage -I../../Source/WebCore/style -I../../Source/WebCore/svg -I../../Source/WebCore/svg/animation -I../../Source/WebCore/svg/graphics -I../../Source/WebCore/svg/graphics/filters -I../../Source/WebCore/svg/properties -I../../Source/WebCore/websockets -I../../Source/WebCore/workers -I../../Source/WebCore/workers/service -I../../Source/WebCore/workers/service/context -I../../Source/WebCore/workers/service/server -I../../Source/WebCore/xml -I../../Source/WebCore/xml/parser -IDerivedSources/WebCore -IDerivedSources/ForwardingHeaders/ANGLE -I../../Source/WebCore/platform/graphics/gpu -I../../Source/ThirdParty/xdgmime/src -I../../Source/WebCore/platform/graphics/cairo -I../../Source/WebCore/platform/graphics/freetype -I../../Source/WebCore/platform/graphics/gstreamer -I../../Source/WebCore/platform/graphics/gstreamer/mse -I../../Source/WebCore/platform/graphics/gstreamer/eme -I../../Source/WebCore/platform/audio/gstreamer -I../../Source/WebCore/platform/image-decoders -I../../Source/WebCore/platform/image-decoders/bmp -I../../Source/WebCore/platform/image-decoders/gif -I../../Source/WebCore/platform/image-decoders/ico -I../../Source/WebCore/platform/image-decoders/jpeg -I../../Source/WebCore/platform/image-decoders/png -I../../Source/WebCore/platform/image-decoders/webp -I../../Source/WebCore/platform/graphics/texmap -I../../Source/WebCore/page/scrolling/coordinatedgraphics -I../../Source/WebCore/platform/graphics/texmap/coordinated -I../../Source/WebCore/platform/graphics/nicosia -I../../Source/WebCore/platform/graphics/nicosia/cairo -I../../Source/WebCore/platform/graphics/nicosia/texmap -I../../Source/ThirdParty/ANGLE -I../../Source/ThirdParty/ANGLE/include/KHR -I../../Source/WebCore/accessibility/atk -I../../Source/WebCore/editing/atk -I../../Source/WebCore/page/gtk -I../../Source/WebCore/platform/geoclue -I../../Source/WebCore/platform/gtk -I../../Source/WebCore/platform/graphics/egl -I../../Source/WebCore/platform/graphics/glx -I../../Source/WebCore/platform/graphics/gtk -I../../Source/WebCore/platform/graphics/opengl -I../../Source/WebCore/platform/graphics/wayland -I../../Source/WebCore/platform/graphics/x11 -I../../Source/WebCore/platform/mediacapabilities -I../../Source/WebCore/platform/mediastream/gtk -I../../Source/WebCore/platform/mediastream/gstreamer -I../../Source/WebCore/platform/network/gtk -I../../Source/WebCore/platform/network/soup -I../../Source/WebCore/platform/text/gtk -I../../Source/WebCore/bindings/gobject -isystem /usr/include/libxml2 -isystem /usr/include/cairo -isystem /usr/include/freetype2/freetype -isystem /usr/include/freetype2 -isystem /usr/include/harfbuzz -isystem /usr/include/gstreamer-1.0 -isystem /usr/lib/x86_64-linux-gnu/gstreamer-1.0/include -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/atk-1.0 -isystem /usr/include/enchant -isystem /usr/include/gio-unix-2.0 -isystem /usr/include/libsecret-1 -isystem /usr/include/libsoup-2.4 -IDerivedSources/ForwardingHeaders -I../../Source/bmalloc -IDerivedSources -I../../Source/ThirdParty -fdiagnostics-color=always -fcolor-diagnostics -Wno-parentheses-equality -Qunused-arguments -Wwrite-strings -Wundef -Wpointer-arith -Wmissing-format-attribute -Wformat-security -Wcast-align -Wextra -Wall  -fno-strict-aliasing -fno-exceptions -fno-rtti -std=c++14 -O3 -DNDEBUG -fPIC -MMD -MT Source/WebCore/CMakeFiles/WebCore.dir/__/__/DerivedSources/WebCore/unified-sources/UnifiedSource367.cpp.o -MF Source/WebCore/CMakeFiles/WebCore.dir/__/__/DerivedSources/WebCore/unified-sources/UnifiedSource367.cpp.o.d -o Source/WebCore/CMakeFiles/WebCore.dir/__/__/DerivedSources/WebCore/unified-sources/UnifiedSource367.cpp.o -c DerivedSources/WebCore/unified-sources/UnifiedSource367.cpp
In file included from DerivedSources/WebCore/unified-sources/UnifiedSource367.cpp:1:
In file included from ../../Source/WebCore/platform/graphics/gstreamer/ImageGStreamerCairo.cpp:21:
../../Source/WebCore/platform/graphics/gstreamer/ImageGStreamer.h:47:20: error: no viable conversion from returned value of type 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to function return type 'RefPtr<WebCore::ImageGStreamer>'
            return image;
                   ^~~~~
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:58:47: note: candidate constructor not viable: no known conversion from 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to 'WebCore::ImageGStreamer *' for 1st argument
    inline __attribute__((__always_inline__)) RefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
                                              ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:59:47: note: candidate constructor not viable: no known conversion from 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to 'const WTF::RefPtr<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> > &' for 1st argument
    inline __attribute__((__always_inline__)) RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { refIfNotNull(PtrTraits::unwrap(m_ptr)); }
                                              ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:62:47: note: candidate constructor not viable: no known conversion from 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to 'WTF::RefPtr<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> > &&' for 1st argument
    inline __attribute__((__always_inline__)) RefPtr(RefPtr&& o) : m_ptr(o.leakRef()) { }
                                              ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:64:38: note: candidate constructor [with X = WebCore::ImageGStreamer, Y = WTF::DumbPtrTraits<WebCore::ImageGStreamer>] not viable: no known conversion from 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to 'Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> > &&' for 1st argument
    template<typename X, typename Y> RefPtr(Ref<X, Y>&&);
                                     ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:67:5: note: candidate constructor not viable: no known conversion from 'WTF::Ref<WebCore::ImageGStreamer, WTF::DumbPtrTraits<WebCore::ImageGStreamer> >' to 'WTF::HashTableDeletedValueType' for 1st argument
    RefPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
    ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:60:38: note: candidate template ignored: could not match 'RefPtr' against 'Ref'
    template<typename X, typename Y> RefPtr(const RefPtr<X, Y>& o) : m_ptr(o.get()) { refIfNotNull(PtrTraits::unwrap(m_ptr)); }
                                     ^
DerivedSources/ForwardingHeaders/wtf/RefPtr.h:63:38: note: candidate template ignored: could not match 'RefPtr' against 'Ref'
    template<typename X, typename Y> RefPtr(RefPtr<X, Y>&& o) : m_ptr(o.leakRef()) { }
                                     ^
DerivedSources/ForwardingHeaders/wtf/Ref.h:123:5: note: candidate function
    operator T&() const { ((void)0); return *PtrTraits::unwrap(m_ptr); }
    ^
1 error generated.

https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20Ubuntu%20LTS%20%28Build%29/builds/14907/steps/compile-webkit/logs/stdio
Comment 12 Ms2ger (he/him; ⌚ UTC+1/+2) 2018-08-22 07:01:24 PDT 
Created attachment 347787 [details]
Patch
Comment 13 WebKit Commit Bot 2018-08-22 07:47:10 PDT 
Comment on attachment 347787 [details]
Patch

Clearing flags on attachment: 347787

Committed r235171: <https://trac.webkit.org/changeset/235171>
Comment 14 WebKit Commit Bot 2018-08-22 07:47:11 PDT 
All reviewed patches have been landed.  Closing bug.