Seeing intermittent crash when calling attributesForAttributedStringRepresentation on DHTMLElement

[echoz]

Using DTCoreText 1.6.10.
iOS Version: 6.1.5 (iPod Touch 4th gen) and 7.1 (iPhone 5s)

Crash case 1:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryM fontAttributes]: unrecognized selector sent to instance 0x23a29c00'

Stack Trace (Thread 15):

Last Exception Backtrace:
0   CoreFoundation                       0x328232a3 __exceptionPreprocess + 163
1   libobjc.A.dylib                      0x3a4a397f objc_exception_throw + 28
2   CoreFoundation                       0x32826e07 -[NSObject(NSObject) doesNotRecognizeSelector:] + 168
3   CoreFoundation                       0x32825531 ___forwarding___ + 390
4   CoreFoundation                       0x3277cf68 _CF_forwarding_prep_0 + 22
5   Meow                                 0x003f5c6b -[DTCoreTextFontDescriptor _findOrMakeMatchingFont] (DTCoreTextFontDescriptor.m:582)
6   Meow                                 0x00405c59 -[DTHTMLElement attributesForAttributedStringRepresentation] (DTHTMLElement.m:125)
7   Meow                                 0x00117967 +[NSString(MinusRichTextParser) attributedStyleForParagraphWithFont:fontColor:lineHeight:] (NSString+MinusRichTextParser.m:207)
8   Meow                                 0x0011610b -[NSString(MinusRichTextParser) attributedStringWithParseTypes:options:] (NSString+MinusRichTextParser.m:45)
9   Meow                                 0x00182a65 +[MMessageTextCell attributedStringForCodedString:withLinks:font:color:linkFont:linkColor:lineHeight:] (MMessageTextCell.m:222)
10  Meow                                 0x000f024f __83-[MMessageThreadViewController reloadTableViewAndScrollToBottomOptions:completion:]_block_invoke_2 (MMessageThreadViewController.m:1477)
11  Meow                                 0x0010dcb3 __43-[MinusStore performOnQueue:coreDataBlock:]_block_invoke (MinusStore.m:326)
12  Meow                                 0x0010dd51 +[MinusStore performOnQueue:block:] (MinusStore.m:337)
13  Meow                                 0x0010dbc1 -[MinusStore performOnQueue:coreDataBlock:] (MinusStore.m:319)
14  Meow                                 0x000efab5 __83-[MMessageThreadViewController reloadTableViewAndScrollToBottomOptions:completion:]_block_invoke (MMessageThreadViewController.m:1449)
15  libdispatch.dylib                    0x3a8bb11f _dispatch_call_block_and_release + 8
16  libdispatch.dylib                    0x3a8ba99b _dispatch_queue_drain$VARIANT$up + 144
17  libdispatch.dylib                    0x3a8ba895 _dispatch_queue_invoke$VARIANT$up + 34
18  libdispatch.dylib                    0x3a8c9215 _dispatch_root_queue_drain + 190
19  libdispatch.dylib                    0x3a8c93b9 _dispatch_worker_thread2 + 82
20  libsystem_c.dylib                    0x3a8efa11 _pthread_wqthread + 358
21  libsystem_c.dylib                    0x3a8ef8a4 start_wqthread + 6

Crash Case 2:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_UIFontCacheKey italicTrait]: unrecognized selector sent to instance 0x1aee7090'

StackTrace (Thread 10):

Last Exception Backtrace:
0   CoreFoundation                       0x30a4bf03 __exceptionPreprocess + 131
1   libobjc.A.dylib                      0x3b1dcce7 objc_exception_throw + 36
2   CoreFoundation                       0x30a4f837 -[NSObject(NSObject) doesNotRecognizeSelector:] + 200
3   CoreFoundation                       0x30a4e12f ___forwarding___ + 704
4   CoreFoundation                       0x3099d0d8 __forwarding_prep_0___ + 22
5   Meow                                 0x003e91d1 -[DTCoreTextFontDescriptor _findOrMakeMatchingFont] (DTCoreTextFontDescriptor.m:645)
6   Meow                                 0x003f8ff9 -[DTHTMLElement attributesForAttributedStringRepresentation] (DTHTMLElement.m:125)
7   Meow                                 0x0010abef +[NSString(MinusRichTextParser) attributedStyleForParagraphWithFont:fontColor:lineHeight:] (NSString+MinusRichTextParser.m:207)
8   Meow                                 0x001093a3 -[NSString(MinusRichTextParser) attributedStringWithParseTypes:options:] (NSString+MinusRichTextParser.m:45)
9   Meow                                 0x00175c87 +[MMessageTextCell attributedStringForCodedString:withLinks:font:color:linkFont:linkColor:lineHeight:] (MMessageTextCell.m:222)
10  Meow                                 0x0009b6e5 __61-[MMessageInboxViewController reloadTableViewWithCompletion:]_block_invoke_2 (MMessageInboxViewController.m:279)
11  Meow                                 0x00100f63 __43-[MinusStore performOnQueue:coreDataBlock:]_block_invoke (MinusStore.m:326)
12  Meow                                 0x00101001 +[MinusStore performOnQueue:block:] (MinusStore.m:337)
13  Meow                                 0x00100e71 -[MinusStore performOnQueue:coreDataBlock:] (MinusStore.m:319)
14  Meow                                 0x0009b431 __61-[MMessageInboxViewController reloadTableViewWithCompletion:]_block_invoke (MMessageInboxViewController.m:275)
15  libdispatch.dylib                    0x3b6c5d53 _dispatch_call_block_and_release + 8
16  libdispatch.dylib                    0x3b6cacbd _dispatch_queue_drain + 486
17  libdispatch.dylib                    0x3b6c7c6f _dispatch_queue_invoke + 40
18  libdispatch.dylib                    0x3b6cb5f1 _dispatch_root_queue_drain + 74
19  libdispatch.dylib                    0x3b6cb8dd _dispatch_worker_thread2 + 54
20  libsystem_pthread.dylib              0x3b7f6c17 _pthread_wqthread + 296
21  libsystem_pthread.dylib              0x3b7f6adc start_wqthread + 6

Be happy to provide any other details

[odrobnik]

Need reliable steps to reproduce to do anything about this. Seems like a new iOS 7.1 bug. To get that fixed or find a workaround we need to determine the actual cause.

[odrobnik]

Nothing received back from reporter. Closing issue for that reason.