I did finally get a crash report:
Process: Photos [2297]
Path: /Applications/Photos.app/Contents/MacOS/Photos
Identifier: com.apple.Photos
Version: 1.0 (209.52.0)
Build Info: PhotoApp-209052000000000~4
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Photos [2297]
User ID: 501
Date/Time: 2015-04-12 09:17:49.460 -0400
OS Version: Mac OS X 10.10.3 (14D131)
Report Version: 11
Anonymous UUID: 183812F9-D4EE-4F74-39FC-C2AE2C171CBB
Time Awake Since Boot: 63000 seconds
Crashed Thread: 16 Dispatch queue: BGImageProcPropQueue
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
Assertion failure in -[RKBipJob updateFromJob:], /SourceCache/PhotoApp/PhotoApp-209.52/lib/redrock/Image/RKBipJob.m:68
Invalid parameter not satisfying: [self isEqual:job]
abort() called
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8a2ad4de mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8a2ac64f mach_msg + 55
2 com.apple.CoreFoundation 0x00007fff8510aeb4 __CFRunLoopServiceMachPort + 212
3 com.apple.CoreFoundation 0x00007fff8510a37b __CFRunLoopRun + 1371
4 com.apple.CoreFoundation 0x00007fff85109bd8 CFRunLoopRunSpecific + 296
5 com.apple.HIToolbox 0x00007fff8aca056f RunCurrentEventLoopInMode + 235
6 com.apple.HIToolbox 0x00007fff8aca02ea ReceiveNextEventCommon + 431
7 com.apple.HIToolbox 0x00007fff8aca012b _BlockUntilNextEventMatchingListInModeWithFilter + 71
8 com.apple.AppKit 0x00007fff8cb409bb _DPSNextEvent + 978
9 com.apple.AppKit 0x00007fff8cb3ff68 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
10 com.apple.AppKit 0x00007fff8cb35bf3 -[NSApplication run] + 594
11 com.apple.AppKit 0x00007fff8cab2354 NSApplicationMain + 1832
12 libdyld.dylib 0x00007fff84b9f5c9 start + 1
Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff8a2b3232 kevent64 + 10
1 libdispatch.dylib 0x00007fff8f2b1a6a _dispatch_mgr_thread + 52
Thread 2:: Dispatch queue: NSOperationQueue 0x6200004236e0 :: NSOperation 0x61000252e560 (QOS: UTILITY)
0 libsystem_kernel.dylib 0x00007fff8a2b2ba2 close + 10
1 com.apple.CoreFoundation 0x00007fff850b0e8e CFRelease + 526
2 com.apple.ImageIO.framework 0x00007fff8a4cae59 _CGImageReadSessionFinalize + 47
3 com.apple.CoreFoundation 0x00007fff850b0e8e CFRelease + 526
4 com.apple.ImageIO.framework 0x00007fff8a503241 _CGImagePlusFinalize + 184
5 com.apple.CoreFoundation 0x00007fff850b0e8e CFRelease + 526
6 com.apple.CoreFoundation 0x00007fff850c539d -[__NSArrayM dealloc] + 205
7 libobjc.A.dylib 0x00007fff8dcd189c objc_object::sidetable_release(bool) + 236
8 com.apple.CoreFoundation 0x00007fff850b0db0 CFRelease + 304
9 com.apple.ImageIO.framework 0x00007fff8a502ed4 _CGImageSourceFinalize + 172
10 com.apple.CoreFoundation 0x00007fff850b0e8e CFRelease + 526
11 com.apple.photo.PAImagingCore 0x0000000108d38b86 -[PAImageLoader dealloc] + 33
12 libobjc.A.dylib 0x00007fff8dcd189c objc_object::sidetable_release(bool) + 236
13 com.apple.photo.PAImaging 0x0000000108adaaa6 -[PAImageRequestService _submitDiscreteFilePreviewRequest:imageStyle:invalidationKey:canceler:fileCache Key:processedImageCacheKey:cache:masterToRasterOrientation:rasterToDisplayOrient ation:] + 5574
14 com.apple.photo.PAImaging 0x0000000108adb135 -[PAImageRequestService _submitDiscreteFilePreviewRequest:canceler:imageStyle:cache:fileSize:requestSiz eRasterOrientation:masterToRasterOrientation:displayOrientation:] + 421
15 com.apple.photo.PAImaging 0x0000000108adbead -[PAImageRequestService _checkAndSubmitPreviewRequest:canceler:imageStyle:requestSizeDisplayOrientation :displayOrientation:done:] + 1027
16 com.apple.photo.PAImaging 0x0000000108943942 -[PAImageRequestService submitPreviewRequest:canceler:] + 4446
17 com.apple.photo.PAImagingCore 0x0000000108d3beef -[PAPreviewRequest submitSynchronous:] + 80
18 com.apple.photos.mondrian 0x00000001084a0134 __121-[MOMediaRedRockItem thumbnailImageOperationForResolution:size:mode:reason:placeholder:colorSpace:wi thCompletionHandler:]_block_invoke133 + 1605
19 com.apple.photos.mondrian 0x0000000108471d43 __70+[MOMediaItem operationWithBlock:cancellationBlock:completionHandler:]_block_invoke + 128
20 com.apple.photos.mondrian 0x000000010847161d -[MONSOperation launchOperation] + 64
21 com.apple.photos.mondrian 0x00000001084714b6 -[MONSOperation _launchOperation] + 34
22 com.apple.photos.mondrian 0x0000000108471053 -[MONSOperation start] + 175
23 com.apple.photos.mondrian 0x0000000108471bc3 -[MONSOperation performSynchronously:timeout:] + 364
24 com.apple.photos.mondrian 0x000000010847199e -[MONSOperation performSubOperationSynchronously:progressBlock:timeout:] + 232
25 com.apple.photos.mondrian 0x00000001084b3a68 __117+[MOMediaItem thumbnailImagesOperationForMediaItems:withResolution:mode:placeholder:colorSpac e:andCompletionHandler:]_block_invoke + 1088
26 com.apple.photos.mondrian 0x0000000108471d43 __70+[MOMediaItem operationWithBlock:cancellationBlock:completionHandler:]_block_invoke + 128
27 com.apple.photos.mondrian 0x000000010847161d -[MONSOperation launchOperation] + 64
28 com.apple.photos.mondrian 0x00000001084714b6 -[MONSOperation _launchOperation] + 34
29 com.apple.photos.mondrian 0x0000000108471053 -[MONSOperation start] + 175
30 com.apple.photos.mondrian 0x0000000108471bc3 -[MONSOperation performSynchronously:timeout:] + 364
31 com.apple.photos.mondrian 0x000000010847199e -[MONSOperation performSubOperationSynchronously:progressBlock:timeout:] + 232
32 com.apple.photos.mondrian 0x0000000108481a03 __54-[MOPhotosAtlasView _prepareOperationForRowIndexPath:]_block_invoke + 1822
33 com.apple.photos.mondrian 0x000000010847161d -[MONSOperation launchOperation] + 64
34 com.apple.photos.mondrian 0x00000001084714b6 -[MONSOperation _launchOperation] + 34
35 com.apple.photos.mondrian 0x0000000108471053 -[MONSOperation start] + 175
36 com.apple.Foundation 0x00007fff8df04543 __NSOQSchedule_f + 184
37 libdispatch.dylib 0x00007fff8f2aec13 _dispatch_client_callout + 8
38 libdispatch.dylib 0x00007fff8f2b2365 _dispatch_queue_drain + 1100
39 libdispatch.dylib 0x00007fff8f2b3ecc _dispatch_queue_invoke + 202
40 libdispatch.dylib 0x00007fff8f2b16b7 _dispatch_root_queue_drain + 463
41 libdispatch.dylib 0x00007fff8f2bffe4 _dispatch_worker_thread3 + 91
42 libsystem_pthread.dylib 0x00007fff8850d637 _pthread_wqthread + 729
43 libsystem_pthread.dylib 0x00007fff8850b40d start_wqthread + 13