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    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - com.apple.WebKit.Networking crash at -[WebCoreAuthenticationClientAsChallengeSender performDefaultHandlingForAuthenticationChallenge:]: unrecognized selector sent to instance"
   href="https://bugs.webkit.org/show_bug.cgi?id=156947">156947</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>com.apple.WebKit.Networking crash at -[WebCoreAuthenticationClientAsChallengeSender performDefaultHandlingForAuthenticationChallenge:]: unrecognized selector sent to instance
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Page Loading
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ddkilzer&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>achristensen&#64;apple.com, ap&#64;webkit.org, beidson&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>com.apple.WebKit.Networking crashes at -[WebCoreAuthenticationClientAsChallengeSender performDefaultHandlingForAuthenticationChallenge:] due to an unrecognized selector sent to instance:

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[WebCoreAuthenticationClientAsChallengeSender performDefaultHandlingForAuthenticationChallenge:]: unrecognized selector sent to instance 0x7fbe4ba2c100'
abort() called
terminating with uncaught exception of type NSException

Application Specific Backtrace 1:
0   CoreFoundation                      0x00007fff81124e32 __exceptionPreprocess + 178
1   libobjc.A.dylib                     0x00007fff8a34f4fa objc_exception_throw + 48
2   CoreFoundation                      0x00007fff8118e34d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3   CoreFoundation                      0x00007fff81095472 ___forwarding___ + 514
4   CoreFoundation                      0x00007fff810951e8 _CF_forwarding_prep_0 + 120
5   WebKit                              0x00007fff8bf08490 _ZN6WebKit21AuthenticationManager40performDefaultHandlingForSingleChallengeEy + 104
6   WebKit                              0x00007fff8bf083d9 _ZN6WebKit21AuthenticationManager22performDefaultHandlingEy + 73
7   WebKit                              0x00007fff8bf098ca _ZN6WebKit21AuthenticationManager17didReceiveMessageERN3IPC10ConnectionERNS1_14MessageDecoderE + 196
8   WebKit                              0x00007fff8bf44b61 _ZN3IPC18MessageReceiverMap15dispatchMessageERNS_10ConnectionERNS_14MessageDecoderE + 113
9   WebKit                              0x00007fff8bf69216 _ZN6WebKit14NetworkProcess17didReceiveMessageERN3IPC10ConnectionERNS1_14MessageDecoderE + 28
10  WebKit                              0x00007fff8bf0c602 _ZN3IPC10Connection15dispatchMessageENSt3__110unique_ptrINS_14MessageDecoderENS1_14default_deleteIS3_EEEE + 102
11  WebKit                              0x00007fff8bf0eb2e _ZN3IPC10Connection18dispatchOneMessageEv + 114
12  JavaScriptCore                      0x00007fff92100d85 _ZN3WTF7RunLoop11performWorkEv + 437
13  JavaScriptCore                      0x00007fff92101462 _ZN3WTF7RunLoop11performWorkEPv + 34
14  CoreFoundation                      0x00007fff810ba8b1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
15  CoreFoundation                      0x00007fff8109a0ac __CFRunLoopDoSources0 + 556
16  CoreFoundation                      0x00007fff810995cf __CFRunLoopRun + 927
17  CoreFoundation                      0x00007fff81098fc8 CFRunLoopRunSpecific + 296
18  Foundation                          0x00007fff86bcdf59 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270
19  Foundation                          0x00007fff86bcde38 -[NSRunLoop(NSRunLoop) run] + 74
20  libxpc.dylib                        0x00007fff8412a4c8 _xpc_objc_main + 751
21  libxpc.dylib                        0x00007fff84128f1e xpc_main + 494
22  com.apple.WebKit.Networking         0x10df6db4a main + 16 (Shared/EntryPointUtilities/mac/XPCService/XPCServiceMain.mm:89)
23  libdyld.dylib                       0x00007fff94b305ad start + 1

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib            0x00007fff884c60ae __pthread_kill + 10
1   libsystem_pthread.dylib           0x00007fff90a9a500 pthread_kill + 90
2   libsystem_c.dylib                 0x00007fff8723137b abort + 129
3   libc++abi.dylib                   0x00007fff900baf81 abort_message + 257
4   libc++abi.dylib                   0x00007fff900e0a47 default_terminate_handler() + 267
5   libobjc.A.dylib                   0x00007fff8a35115e _objc_terminate() + 103
6   libc++abi.dylib                   0x00007fff900de19e std::__terminate(void (*)()) + 8
7   libc++abi.dylib                   0x00007fff900dde27 __cxa_rethrow + 99
8   libobjc.A.dylib                   0x00007fff8a34f998 objc_exception_rethrow + 40
9   com.apple.CoreFoundation          0x00007fff8109905b CFRunLoopRunSpecific + 443
10  com.apple.Foundation              0x00007fff86bcdf59 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270
11  com.apple.Foundation              0x00007fff86bcde38 -[NSRunLoop(NSRunLoop) run] + 74
12  libxpc.dylib                      0x00007fff8412a4c8 _xpc_objc_main + 751
13  libxpc.dylib                      0x00007fff84128f1e xpc_main + 494
14  com.apple.WebKit.Networking       0x10df6db4a main + 16 (Shared/EntryPointUtilities/mac/XPCService/XPCServiceMain.mm:89)
15  libdyld.dylib                     0x00007fff94b305ad start + 1</pre>
        </div>
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      <ul>
          <li>You are the assignee for the bug.</li>
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