[Webkit-unassigned] [Bug 43506] http/tests/appcache/idempotent-update.html (or foreign-iframe-main.html?) occasionally crashes on Leopard Bot

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=43506


Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|http/tests/appcache/idempot |http/tests/appcache/idempot
                   |ent-update.html             |ent-update.html (or
                   |occasionally crashes on     |foreign-iframe-main.html?)
                   |Leopard Bot                 |occasionally crashes on
                   |                            |Leopard Bot
           Platform|PC                          |Macintosh
         OS/Version|Mac OS X 10.5               |All
           Priority|P2                          |P1
                 CC|                            |beidson at apple.com,
                   |                            |mjs at apple.com




--- Comment #1 from Alexey Proskuryakov <ap at webkit.org>  2010-08-04 14:27:15 PST ---
I think it's actually foreign-iframe-main.html that crashes the next test. I could get it to assert with --repeat-each 10:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.WebKit                  0x00000001008be62d WebFrameLoaderClient::userAgent(WebCore::KURL const&) + 91 (WebFrameLoaderClient.mm:1281)
1   com.apple.WebCore                 0x00000001011ce685 WebCore::FrameLoader::applyUserAgent(WebCore::ResourceRequest&) + 65 (FrameLoader.cpp:3117)
2   com.apple.WebCore                 0x0000000100e55383 WebCore::ApplicationCacheGroup::createResourceHandle(WebCore::KURL const&, WebCore::ApplicationCacheResource*) + 109 (ApplicationCacheGroup.cpp:469)
3   com.apple.WebCore                 0x0000000100e56975 WebCore::ApplicationCacheGroup::startLoadingEntry() + 487 (ApplicationCacheGroup.cpp:997)
4   com.apple.WebCore                 0x0000000100e58e0c WebCore::ApplicationCacheGroup::didFinishLoading(WebCore::ResourceHandle*) + 672 (ApplicationCacheGroup.cpp:644)
5   com.apple.WebCore                 0x00000001018791ad -[WebCoreResourceHandleAsDelegate connectionDidFinishLoading:] + 270 (ResourceHandleMac.mm:915)
...

This seems to mean that network loading didn't stop when a navigation happened, which may have far reaching consequences. I'm not sure if r40627 has anything to do with this.

This particular assertion doesn't mean immediately crashing in release mode, as there is an early return, but further processing of a spurious didFinishLoading can cause much badness.

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