[Webkit-unassigned] [Bug 204565] New: Queuing a task in EventLoop is not working with completion handlers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204565

            Bug ID: 204565
           Summary: Queuing a task in EventLoop is not working with
                    completion handlers
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: youennf at gmail.com
                CC: youennf at gmail.com

As can be seen from https://build.webkit.org/results/Apple-Catalina-Debug-WK2-Tests/r252843%20(823)/results.html, completion handlers given to UserMediaRequest::allow are not always called.
ASSERTION FAILED: Completion handler should always be called
!m_function
/Volumes/Data/slave/catalina-debug/build/WebKitBuild/Debug/usr/local/include/wtf/CompletionHandler.h(53) : WTF::CompletionHandler<void ()>::~CompletionHandler()
1   0x4ab785659 WTFCrash
2   0x490e086b3 WTF::CompletionHandler<void ()>::~CompletionHandler()
3   0x490e08645 WTF::CompletionHandler<void ()>::~CompletionHandler()
4   0x492af75e3 WebCore::UserMediaRequest::allow(WebCore::CaptureDevice&&, WebCore::CaptureDevice&&, WTF::String&&, WTF::CompletionHandler<void ()>&&)::$_2::~$_2()
5   0x492af43d5 WebCore::UserMediaRequest::allow(WebCore::CaptureDevice&&, WebCore::CaptureDevice&&, WTF::String&&, WTF::CompletionHandler<void ()>&&)::$_2::~$_2()
6   0x492b01511 WTF::Detail::CallableWrapper<WebCore::UserMediaRequest::allow(WebCore::CaptureDevice&&, WebCore::CaptureDevice&&, WTF::String&&, WTF::CompletionHandler<void ()>&&)::$_2, void>::~CallableWrapper()
7   0x492b013f5 WTF::Detail::CallableWrapper<WebCore::UserMediaRequest::allow(WebCore::CaptureDevice&&, WebCore::CaptureDevice&&, WTF::String&&, WTF::CompletionHandler<void ()>&&)::$_2, void>::~CallableWrapper()
8   0x492b01419 WTF::Detail::CallableWrapper<WebCore::UserMediaRequest::allow(WebCore::CaptureDevice&&, WebCore::CaptureDevice&&, WTF::String&&, WTF::CompletionHandler<void ()>&&)::$_2, void>::~CallableWrapper()
9   0x490da79ff std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> >::operator()(WTF::Detail::CallableWrapperBase<void>*) const
10  0x490da79bf std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::reset(WTF::Detail::CallableWrapperBase<void>*)
11  0x490da7959 std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::~unique_ptr()
12  0x490da7935 std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::~unique_ptr()
13  0x490da7915 WTF::Function<void ()>::~Function()
14  0x490da78f5 WTF::Function<void ()>::~Function()
15  0x492b00f13 void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::UserMediaRequest>(WebCore::UserMediaRequest&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'()::~()
16  0x492b00105 void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::UserMediaRequest>(WebCore::UserMediaRequest&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'()::~()
17  0x492b00a41 WTF::Detail::CallableWrapper<void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::UserMediaRequest>(WebCore::UserMediaRequest&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'(), void>::~CallableWrapper()
18  0x492b00585 WTF::Detail::CallableWrapper<void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::UserMediaRequest>(WebCore::UserMediaRequest&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'(), void>::~CallableWrapper()
19  0x492b005a9 WTF::Detail::CallableWrapper<void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::UserMediaRequest>(WebCore::UserMediaRequest&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'(), void>::~CallableWrapper()
20  0x490da79ff std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> >::operator()(WTF::Detail::CallableWrapperBase<void>*) const
21  0x490da79bf std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::reset(WTF::Detail::CallableWrapperBase<void>*)
22  0x490da7959 std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::~unique_ptr()
23  0x490da7935 std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void> > >::~unique_ptr()
24  0x490da7915 WTF::Function<void ()>::~Function()
25  0x490da78f5 WTF::Function<void ()>::~Function()
26  0x49368c561 WebCore::EventLoopFunctionDispatchTask::~EventLoopFunctionDispatchTask()
27  0x49368bbc5 WebCore::EventLoopFunctionDispatchTask::~EventLoopFunctionDispatchTask()
28  0x49368bbe9 WebCore::EventLoopFunctionDispatchTask::~EventLoopFunctionDispatchTask()
29  0x4936971df std::__1::default_delete<WebCore::EventLoopTask>::operator()(WebCore::EventLoopTask*) const
30  0x49369719f std::__1::unique_ptr<WebCore::EventLoopTask, std::__1::default_delete<WebCore::EventLoopTask> >::reset(WebCore::EventLoopTask*)
31  0x493697139 std::__1::unique_ptr<WebCore::EventLoopTask, std::__1::default_delete<WebCore::EventLoopTask> >::~unique_ptr()
LEAK: 1 WebPageProxy

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