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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [win] Heap corruption when closing webView not associated with a window"
href="https://bugs.webkit.org/show_bug.cgi?id=151162#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [win] Heap corruption when closing webView not associated with a window"
href="https://bugs.webkit.org/show_bug.cgi?id=151162">bug 151162</a>
from <span class="vcard"><a class="email" href="mailto:isaac+webkit@devinesystems.co.nz" title="isaac+webkit@devinesystems.co.nz">isaac+webkit@devinesystems.co.nz</a>
</span></b>
<pre>This also affects minibrowser in the tests directory. (run it, attach debugger and close the minibrowser window).
I.e. it affects *all webviews*, including those attached to host windows.
Turns out the assertion is thrown when m_mutex is destroyed in Hashtable.h (line 493).
The Lock pointer held by the unique_ptr is bad, as shown by the following stack trace:
<span class="quote">> ucrtbased.dll!free_dbg_nolock(void * const block, const int block_use) Line 892 C++</span >
ucrtbased.dll!_free_dbg(void * block, int block_use) Line 1011 C++
WebKit.dll!operator delete(void * block) Line 17 C++
WebKit.dll!operator delete(void * block, unsigned int __formal) Line 15 C++
WebKit.dll!std::default_delete<WTF::Lock>::operator()(WTF::Lock * _Ptr) Line 1201 C++
WebKit.dll!std::unique_ptr<WTF::Lock,std::default_delete<WTF::Lock> >::~unique_ptr<WTF::Lock,std::default_delete<WTF::Lock> >() Line 1404 C++
WebKit.dll!WTF::HashTable<WTF::String,WTF::KeyValuePair<WTF::String,Inspector::SupplementalBackendDispatcher *>,WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::String,Inspector::SupplementalBackendDispatcher *> >,WTF::StringHash,WTF::HashMap<WTF::String,Inspector::SupplementalBackendDispatcher *,WTF::StringHash,WTF::HashTraits<WTF::String>,WTF::HashTraits<Inspector::SupplementalBackendDispatcher *> >::KeyValuePairTraits,WTF::HashTraits<WTF::String> >::~HashTable<WTF::String,WTF::KeyValuePair<WTF::String,Inspector::SupplementalBackendDispatcher *>,WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::String,Inspector::SupplementalBackendDispatcher *> >,WTF::StringHash,WTF::HashMap<WTF::String,Inspector::SupplementalBackendDispatcher *,WTF::StringHash,WTF::HashTraits<WTF::String>,WTF::HashTraits<Inspector::SupplementalBackendDispatcher *> >::KeyValuePairTraits,WTF::HashTraits<WTF::String&
[External Code]
WebKit.dll!WTF::RefCounted<Inspector::BackendDispatcher>::deref() Line 146 C++
WebKit.dll!WTF::Ref<Inspector::BackendDispatcher>::~Ref<Inspector::BackendDispatcher>() Line 57 C++
WebKit.dll!WebCore::InspectorController::~InspectorController() Line 190 C++
[External Code]
WebKit.dll!WebCore::Page::~Page() Line 293 C++
[External Code]
WebKit.dll!WebView::close() Line 769 C++
webkitdebugheap.exe!WinMain(HINSTANCE__ * hinst, HINSTANCE__ * __formal, char * __formal, int nShowCmd) Line 214 C++
[External Code]</pre>
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