Assertion failed: (CGFloatIsValid(x)

Question

iPhoto crashed a couple of times while editing a couple of different pictures, and now everytime it starts up, an assert is firing and killing the App.  In iOS developer documentation, Apple requests that apps never "just die" when they encounter an error, and this is certainly a case that looks to be unrelated to the photo content, in that the stack trace points at some window decoration drawing it seems to me.   What can I do to stop this from happening so that I can open iPhoto again?  The bezierPath fill should not be using photo data, so what gives?
Application Specific Information:
Assertion failed: (CGFloatIsValid(x) && CGFloatIsValid(y)), function void CGPathAddLineToPoint(CGMutablePathRef, const CGAffineTransform *, CGFloat, CGFloat), file Paths/CGPath.cc, line 224.
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib                  0x948d6922 __pthread_kill + 10
1   libsystem_pthread.dylib                 0x938c41bc pthread_kill + 101
2   libsystem_c.dylib                       0x96a623a8 abort + 155
3   libsystem_c.dylib                       0x96a2d4a6 __assert_rtn + 347
4   com.apple.CoreGraphics                  0x9517972c CGPathAddLineToPoint + 164
5   com.apple.CoreGraphics                  0x951c7bb9 CGContextAddLineToPoint + 148
6   com.apple.AppKit                        0x92f2c5ae -[NSBezierPath fill] + 210
7   com.apple.iPhoto                        0x00576591 0xb9000 + 4969873
8   com.apple.iPhoto                        0x001cbbce 0xb9000 + 1125326
9   com.apple.AppKit                        0x92ed62ed -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:topView:] + 1034
10  com.apple.AppKit                        0x934af73d __46-[NSView(NSLayerKitGlue) drawLayer:inContext:]_block_invoke + 223
11  com.apple.AppKit                        0x92ed5bee -[NSView(NSLayerKitGlue) _drawViewBackingLayer:inContext:drawingHandler:] + 2085
12  com.apple.AppKit                        0x92ed5307 -[NSView(NSLayerKitGlue) drawLayer:inContext:] + 115
13  com.apple.AppKit                        0x93179f9a -[_NSViewBackingLayer drawInContext:] + 383
14  com.apple.QuartzCore                    0x999755b6 backing_callback(CGContext*, void*) + 96
15  com.apple.QuartzCore                    0x9984ccca CABackingStoreUpdate_ + 3412
16  com.apple.QuartzCore                    0x9997554e ___ZN2CA5Layer8display_Ev_block_invoke + 93
17  com.apple.QuartzCore                    0x9999f593 x_blame_allocations + 88
18  com.apple.QuartzCore                    0x9984b9b0 CA::Layer::display_() + 1552
19  com.apple.QuartzCore                    0x9984b39b -[CALayer _display] + 20
20  com.apple.QuartzCore                    0x9984b37c CA::Layer::display() + 186
21  com.apple.QuartzCore                    0x9984b2ba -[CALayer display] + 20
22  com.apple.AppKit                        0x9366301b _NSBackingLayerDisplay + 105
23  com.apple.AppKit                        0x93662fad -[_NSBackingLayer display] + 26
24  com.apple.AppKit                        0x931798ff -[_NSViewBackingLayer display] + 1788
25  com.apple.QuartzCore                    0x9984b1e4 CA::Layer::display_if_needed(CA::Transaction*) + 690
26  com.apple.QuartzCore                    0x9984aa6c CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 38
27  com.apple.QuartzCore                    0x9983fab0 CA::Context::commit_transaction(CA::Transaction*) + 292
28  com.apple.QuartzCore                    0x9983f849 CA::Transaction::commit() + 393
29  com.apple.QuartzCore                    0x9983f64f CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 75
30  com.apple.CoreFoundation                0x9459c09e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
31  com.apple.CoreFoundation                0x9459bfef __CFRunLoopDoObservers + 399
32  com.apple.CoreFoundation                0x945757ca CFRunLoopRunSpecific + 666
33  com.apple.CoreFoundation                0x9457551b CFRunLoopRunInMode + 123
34  com.apple.HIToolbox                     0x96686931 RunCurrentEventLoopInMode + 259
35  com.apple.HIToolbox                     0x966866ad ReceiveNextEventCommon + 526
36  com.apple.HIToolbox                     0x967ec678 _BlockUntilNextEventMatchingListInModeWithFilter + 92
37  com.apple.AppKit                        0x92d506d9 _DPSNextEvent + 1602
38  com.apple.AppKit                        0x92d4fc00 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
39  com.apple.AppKit                        0x92d46e1c -[NSApplication run] + 727
40  com.apple.AppKit                        0x92cecc18 NSApplicationMain + 1165
41  com.apple.iPhoto                        0x000c90b9 0xb9000 + 65721
42  com.apple.iPhoto                        0x000c8705 0xb9000 + 63237

Answer 1

Does this involve iPhoto for Mac in some way? If so, a full description of the issue is best:
- What version of iPhoto.
- What version of the Operating System.
- Details. As full a description of the problem as you can. For instance: 'iPhoto won't export' is best explained by describing how you are trying to export, and so on.
- History: Is this going on long? Has anything been installed or deleted?
- Are there error messages?
- What steps have you tried already to solve the issue.
- Anything unusual about your set up? Or how you use iPhoto?
Anything else you can think of that might help someone understand the problem you have.