[Webkit-unassigned] [Bug 140367] New: Web Inspector: ASSERT under WebCore::InspectorResourceAgent::loadResource

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=140367

            Bug ID: 140367
           Summary: Web Inspector: ASSERT under
                    WebCore::InspectorResourceAgent::loadResource
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Keywords: DoNotImportToRadar
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: burg at cs.washington.edu, graouts at webkit.org,
                    joepeck at webkit.org, jonowells at apple.com,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

* SUMMARY
Seeing reports of an assertion in Network.loadRequest (used to load SourceMap resources).

ASSERTION FAILED: m_ptr
Ref.h(92) : T *WTF::Ref<Inspector::InspectorNetworkBackendDispatcherHandler::LoadResourceCallback>::operator->() [T = Inspector::InspectorNetworkBackendDispatcherHandler::LoadResourceCallback]
1   0x10dadfb40 WTFCrash
2   0x10fdd3bc5 WTF::Ref<Inspector::InspectorNetworkBackendDispatcherHandler::LoadResourceCallback>::operator->()
3   0x10fdd18f1 WebCore::InspectorResourceAgent::loadResource(WTF::String&, WTF::String const&, WTF::String const&, WTF::Ref<Inspector::InspectorNetworkBackendDispatcherHandler::LoadResourceCallback>&&)
4   0x10fdd1ad7 non-virtual thunk to WebCore::InspectorResourceAgent::loadResource(WTF::String&, WTF::String const&, WTF::String const&, WTF::Ref<Inspector::InspectorNetworkBackendDispatcherHandler::LoadResourceCallback>&&)
5   0x10d6c8b57 Inspector::InspectorNetworkBackendDispatcher::loadResource(long, Inspector::InspectorObject const&)
6   0x10d6c7580 Inspector::InspectorNetworkBackendDispatcher::dispatch(long, WTF::String const&, WTF::Ref<Inspector::InspectorObject>&&)
7   0x10d688e99 Inspector::InspectorBackendDispatcher::dispatch(WTF::String const&)
8   0x10fd13901 WebCore::InspectorController::dispatchMessageFromFrontend(WTF::String const&)
9   0x10ac01661 WebKit::WebInspector::sendMessageToBackend(WTF::String const&)
10  0x10ac0c21f void IPC::callMemberFunctionImpl<WebKit::WebInspector, void (WebKit::WebInspector::*)(WTF::String const&), std::__1::tuple<WTF::String>, 0ul>(WebKit::WebInspector*, void (WebKit::WebInspector::*)(WTF::String const&), std::__1::tuple<WTF::String>&&, std::index_sequence<0ul>)
11  0x10ac0c178 void IPC::callMemberFunction<WebKit::WebInspector, void (WebKit::WebInspector::*)(WTF::String const&), std::__1::tuple<WTF::String>, std::make_index_sequence<1ul> >(std::__1::tuple<WTF::String>&&, WebKit::WebInspector*, void (WebKit::WebInspector::*)(WTF::String const&))


* NOTES
Possible reason for the crash, using a Ref after WTF::move:

    void InspectorResourceAgent::loadResource(ErrorString& errorString, const String& frameId, const String& urlString, Ref<LoadResourceCallback>&& callback)
    {
        ...
        InspectorThreadableLoaderClient* inspectorThreadableLoaderClient = new InspectorThreadableLoaderClient(WTF::move(callback));
        ...
        if (!callback->isActive())
            return;
        ...
    }

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