XCode 4 Documentation Crash

What steps will reproduce the problem?
1. Download the current iOS 4.3 SDK with XCode 4.
2. Build and install the Core Plot doc set for iOS.
3. Click on the doc set in the XCode documentation browser.

What is the expected output? What do you see instead?
Expecting to see the doc. Instead, XCode throws an exception and asks to crash 
or continue in an inconsistent state.

What version of the product are you using? On what operating system?
XCode 4.0.1, Build 4A1006, OS X 10.6.8

Please provide any additional information below.

Here's the exception:

ASSERTION FAILURE in 
/SourceCache/IDEDocViewer/IDEDocViewer-118/Classes/IDEDocSetNodeDocumentLocation
.m:27
Details:  (documentURL) should not be nil.
Object:   <IDEDocSetNodeDocumentLocation: 0x21adb7900>
Method:   -initWithDocumentURL:locationURL:timestamp:
Thread:   <NSThread: 0x200020700>{name = (null), num = 1}
Hints:   None
Backtrace:
  0  0x0000000100949773 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in IDEKit)
  1  0x000000010006d484 _DVTAssertionFailureHandler (in DVTFoundation)
  2  0x0000000118f1fc66 -[IDEDocSetNodeDocumentLocation initWithDocumentURL:locationURL:timestamp:] (in IDEDocViewer)
  3  0x0000000118f2bb91 +[IDEDocSetStructureNode structureEditorOpenSpecifierForDocumentationSearchNavigableItem:error:] (in IDEDocViewer)
  4  0x0000000118f2b63f __33-[IDEDocOrganizerSource loadView]_block_invoke_0 (in IDEDocViewer)
  5  0x00007fff823eb36a NSKeyValueDidChange (in Foundation)
  6  0x00007fff823cea9d -[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] (in Foundation)
  7  0x00007fff823eb36a NSKeyValueDidChange (in Foundation)
  8  0x00007fff823cea9d -[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] (in Foundation)
  9  0x00007fff823d7bc5 _nsnote_callback (in Foundation)
 10  0x00007fff857aa000 __CFXNotificationPost (in CoreFoundation)
 11  0x00007fff85796578 _CFXNotificationPostNotification (in CoreFoundation)
 12  0x00007fff823ceb26 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation)
 13  0x00007fff8900bdf8 -[NSTableView _enableSelectionPostingAndPost] (in AppKit)
 14  0x00007fff890cdb42 -[NSTableView mouseDown:] (in AppKit)
 15  0x00007fff8916a4fd -[NSOutlineView mouseDown:] (in AppKit)
 16  0x00000001008b785c -[IDENavigatorOutlineView mouseDown:] (in IDEKit)
 17  0x00007fff8906f3a7 -[NSWindow sendEvent:] (in AppKit)
 18  0x00007fff88fa4afa -[NSApplication sendEvent:] (in AppKit)
 19  0x000000010085b36e -[IDEApplication sendEvent:] (in IDEKit)
 20  0x00007fff88f3b6de -[NSApplication run] (in AppKit)
 21  0x00007fff88f343b0 NSApplicationMain (in AppKit)
 22  0x0000000100000eec
Original issue reported on code.google.com by r...@erzangel.com on 29 Jul 2011 at 4:19
Merged into: #265
gujjula / core-plot

XCode 4 Documentation Crash #312
