[Webkit-unassigned] [Bug 212537] New: ASSERTION FAILURE (r220931): !m_function in ~CompletionHandler() after switch tabs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=212537

            Bug ID: 212537
           Summary: ASSERTION FAILURE (r220931): !m_function in
                    ~CompletionHandler() after switch tabs
           Product: WebKit
           Version: WebKit Local Build
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Keywords: Regression
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: webkit-bug-importer at group.apple.com
        Depends on: 175721

Seen on iOS when switching tabs.

Backtrace looks like:

#0  0x000000013000120e in ::WTFCrash()
#1  0x00000001010df977 in WTF::CompletionHandler<void ()>::~CompletionHandler()
#2  0x00000001010dd155 in WTF::CompletionHandler<void ()>::~CompletionHandler()
#3  0x00000001022f60ee in WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8::~$_8()
#4  0x00000001022e7495 in WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8::~$_8()
#5  0x0000000102314c95 in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper()
#6  0x0000000102314b95 in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper()
#7  0x0000000102314bbc in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper()
#8  0x000000010113e06f in std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> >::operator()(WTF::Detail::CallableWrapperBase<void, bool>*)
#9  0x000000010113dfef in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::reset(WTF::Detail::CallableWrapperBase<void, bool>*)
#10 0x000000010113df89 in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::~unique_ptr()
#11 0x000000010113df65 in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::~unique_ptr()
#12 0x000000010113df45 in WTF::Function<void (bool)>::~Function()
#13 0x000000010113dec5 in WTF::Function<void (bool)>::~Function()
#14 0x00000001022f6c7e in WebKit::WebProcess::markAllLayersVolatile(WTF::Function<void (bool)>&&)::$_2::~$_2()
#15 0x00000001022e7585 in WebKit::WebProcess::markAllLayersVolatile(WTF::Function<void (bool)>&&)::$_2::~$_2()
...


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=175721
[Bug 175721] REGRESSION (r220601): Crash when closing google doc after switching the order of tabs in safari
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