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    <body><span class="vcard"><a class="email" href="mailto:mcatanzaro&#64;igalia.com" title="Michael Catanzaro &lt;mcatanzaro&#64;igalia.com&gt;"> <span class="fn">Michael Catanzaro</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Do not show context menu when right clicking on a scrollbar"
   href="https://bugs.webkit.org/show_bug.cgi?id=153493">bug 153493</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">CC</td>
           <td>
               &nbsp;
           </td>
           <td>mcatanzaro&#64;igalia.com
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Do not show context menu when right clicking on a scrollbar"
   href="https://bugs.webkit.org/show_bug.cgi?id=153493#c10">Comment # 10</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Do not show context menu when right clicking on a scrollbar"
   href="https://bugs.webkit.org/show_bug.cgi?id=153493">bug 153493</a>
              from <span class="vcard"><a class="email" href="mailto:mcatanzaro&#64;igalia.com" title="Michael Catanzaro &lt;mcatanzaro&#64;igalia.com&gt;"> <span class="fn">Michael Catanzaro</span></a>
</span></b>
        <pre>My guess is the crash is unrelated to your code change, and you just happened to find some test that crashes JSC.


CRASHING TEST: fast/events/contextmenu-on-scrollbars.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebKit                  0x000000010bd528a9 WKArrayGetSize + 9
1   WebKitTestRunnerInjectedBundle    0x00000001172386f7 0x117228000 + 67319
2   com.apple.JavaScriptCore          0x000000010cf49bab long long JSC::APICallbackFunction::call&lt;JSC::JSCallbackFunction&gt;(JSC::ExecState*) + 571 (APICallbackFunction.h:61)
3   com.apple.JavaScriptCore          0x000000010d071343 JSC::LLInt::setUpCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind, JSC::JSValue, JSC::LLIntCallLinkInfo*) + 595 (LLIntSlowPaths.cpp:1110)
4   com.apple.JavaScriptCore          0x000000010d078157 llint_entry + 23679
5   com.apple.JavaScriptCore          0x000000010d0722f5 vmEntryToJavaScript + 299
6   com.apple.JavaScriptCore          0x000000010cefc9ae JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 158 (JITCode.cpp:81)
7   com.apple.JavaScriptCore          0x000000010ce7b15e JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) + 10558 (Interpreter.cpp:972)
8   com.apple.JavaScriptCore          0x000000010cb27d91 JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&amp;, JSC::JSValue, WTF::NakedPtr&lt;JSC::Exception&gt;&amp;) + 593 (Completion.cpp:105)
9   com.apple.WebCore                 0x000000010e56bef5 WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&amp;, WebCore::DOMWrapperWorld&amp;, WebCore::ExceptionDetails*) + 309 (JSMainThreadExecState.h:80)
10  com.apple.WebCore                 0x000000010e56c140 WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&amp;, WebCore::ExceptionDetails*) + 48 (ScriptController.cpp:180)
11  com.apple.WebCore                 0x000000010e5721d4 WebCore::ScriptElement::executeScript(WebCore::ScriptSourceCode const&amp;) + 260 (ScriptElement.cpp:310)
12  com.apple.WebCore                 0x000000010e570ce5 WebCore::ScriptElement::prepareScript(WTF::TextPosition const&amp;, WebCore::ScriptElement::LegacyTypeSupport) + 1061 (StdLibExtras.h:350)
13  com.apple.WebCore                 0x000000010dd591d8 WebCore::HTMLScriptRunner::runScript(WebCore::Element*, WTF::TextPosition const&amp;) + 344 (ScriptElement.h:59)
14  com.apple.WebCore                 0x000000010dd59030 WebCore::HTMLScriptRunner::execute(WTF::PassRefPtr&lt;WebCore::Element&gt;, WTF::TextPosition const&amp;) + 48 (HTMLScriptRunner.cpp:189)
15  com.apple.WebCore                 0x000000010dcf5f86 WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder() + 86 (StdLibExtras.h:350)
16  com.apple.WebCore                 0x000000010dcf604d WebCore::HTMLDocumentParser::canTakeNextToken(WebCore::HTMLDocumentParser::SynchronousMode, WebCore::PumpSession&amp;) + 93 (HTMLDocumentParser.cpp:214)
17  com.apple.WebCore                 0x000000010dcf5c40 WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) + 544 (HTMLDocumentParser.cpp:252)
18  com.apple.WebCore                 0x000000010dcf6990 WebCore::HTMLDocumentParser::append(WTF::RefPtr&lt;WTF::StringImpl&gt;&amp;&amp;) + 736 (DocumentParser.h:71)
19  com.apple.WebCore                 0x000000010da88725 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter&amp;, char const*, unsigned long) + 117 (StdLibExtras.h:350)
20  com.apple.WebCore                 0x000000010dadd731 WebCore::DocumentLoader::commitData(char const*, unsigned long) + 657 (DocumentLoader.cpp:890)
21  com.apple.WebKit                  0x000000010bc606c6 WebKit::WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, char const*, int) + 50
22  com.apple.WebCore                 0x000000010dadf6d1 WebCore::DocumentLoader::commitLoad(char const*, int) + 145 (DocumentLoader.h:229)
23  com.apple.WebCore                 0x000000010d8eaa70 WebCore::CachedRawResource::notifyClientsDataWasReceived(char const*, unsigned int) + 160 (CachedResourceClientWalker.h:51)
24  com.apple.WebCore                 0x000000010d8ea941 WebCore::CachedRawResource::addDataBuffer(WebCore::SharedBuffer&amp;) + 145 (CachedRawResource.cpp:70)
25  com.apple.WebCore                 0x000000010e6b155a WebCore::SubresourceLoader::didReceiveDataOrBuffer(char const*, int, WTF::PassRefPtr&lt;WebCore::SharedBuffer&gt;, long long, WebCore::DataPayloadType) + 218 (SubresourceLoader.cpp:300)
26  com.apple.WebCore                 0x000000010e6b1443 WebCore::SubresourceLoader::didReceiveData(char const*, unsigned int, long long, WebCore::DataPayloadType) + 35 (StdLibExtras.h:350)
27  com.apple.WebKit                  0x000000010bd287ff WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&amp;, IPC::MessageDecoder&amp;) + 291
28  com.apple.WebKit                  0x000000010bafc5bd IPC::Connection::dispatchMessage(std::__1::unique_ptr&lt;IPC::MessageDecoder, std::__1::default_delete&lt;IPC::MessageDecoder&gt; &gt;) + 127
29  com.apple.WebKit                  0x000000010bafecc4 IPC::Connection::dispatchOneMessage() + 126
30  com.apple.JavaScriptCore          0x000000010d2c9fd5 WTF::RunLoop::performWork() + 437 (functional:1742)
31  com.apple.JavaScriptCore          0x000000010d2ca382 WTF::RunLoop::performWork(void*) + 34 (RunLoopCF.cpp:39)
32  com.apple.CoreFoundation          0x00007fff97fa6a01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
33  com.apple.CoreFoundation          0x00007fff97f98b8d __CFRunLoopDoSources0 + 269
34  com.apple.CoreFoundation          0x00007fff97f981bf __CFRunLoopRun + 927
35  com.apple.CoreFoundation          0x00007fff97f97bd8 CFRunLoopRunSpecific + 296
36  com.apple.HIToolbox               0x00007fff9842856f RunCurrentEventLoopInMode + 235
37  com.apple.HIToolbox               0x00007fff984282ea ReceiveNextEventCommon + 431
38  com.apple.HIToolbox               0x00007fff9842812b _BlockUntilNextEventMatchingListInModeWithFilter + 71
39  com.apple.AppKit                  0x00007fff8c4718ab _DPSNextEvent + 978
40  com.apple.AppKit                  0x00007fff8c470e58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
41  com.apple.AppKit                  0x00007fff8c466af3 -[NSApplication run] + 594
42  com.apple.AppKit                  0x00007fff8c3e3244 NSApplicationMain + 1832
43  libxpc.dylib                      0x00007fff90bb8928 _xpc_objc_main + 793
44  libxpc.dylib                      0x00007fff90bba030 xpc_main + 490
45  com.apple.WebKit.WebContent.Development    0x000000010bab4e78 main + 422 (XPCServiceMain.mm:114)
46  libdyld.dylib                     0x00007fff90c0a5c9 start + 1</pre>
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