[Webkit-unassigned] [Bug 158991] URL.createObjectURL from Blob saved in indexedDB does not work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158991

--- Comment #14 from Brady Eidson <beidson at apple.com> ---
In a debug build, Networking process is ASSERTing:

#0    0x00000001142d1db7 in ::WTFCrash() at /Volumes/Data/git/OpenSource/Source/WTF/wtf/Assertions.cpp:317
#1    0x000000010ff95f75 in WebKit::NetworkConnectionToWebProcess::getBlobDataFileReferenceForPath(WTF::String const&) at /Volumes/Data/git/OpenSource/Source/WebKit2/NetworkProcess/NetworkConnectionToWebProcess.cpp:285
#2    0x000000010fef11f7 in WebKit::NetworkBlobRegistry::registerBlobURLOptionallyFileBacked(WebKit::NetworkConnectionToWebProcess*, WebCore::URL const&, WebCore::URL const&, WTF::String const&) at /Volumes/Data/git/OpenSource/Source/WebKit2/NetworkProcess/FileAPI/NetworkBlobRegistry.cpp:89
#3    0x000000010ff95fed in WebKit::NetworkConnectionToWebProcess::registerBlobURLOptionallyFileBacked(WebCore::URL const&, WebCore::URL const&, WTF::String const&) at /Volumes/Data/git/OpenSource/Source/WebKit2/NetworkProcess/NetworkConnectionToWebProcess.cpp:291

...

RefPtr<WebCore::BlobDataFileReference> NetworkConnectionToWebProcess::getBlobDataFileReferenceForPath(const String& path)
{
    ASSERT(m_blobDataFileReferences.contains(path));
    return m_blobDataFileReferences.get(path);
}

m_blobDataFileReferences get's populated for a path from preregisterSandboxExtensionsForOptionallyFileBackedBlob, which is not getting hit by this point in time.

Basically, the Networking process either:
A - Isn't getting its sandbox extension for the file ever
B - Isn't getting it *yet* due to a race or out-of-order.

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