Sample apps not working after #49 merge

[tsfischer]

Thanks for merging #49. However I went to try out the example app on both mac and iOS and it fails. In either case I get an exception... on iOS this crashes the app and on Mac it just fails to render anything.

The exception happens in CMAttributedStringRenderer:appendString because string parm is nil. This seems to go deep into the parsing logic which I didn't fully debug into yet.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSConcreteAttributedString initWithString:: nil value'
*** First throw call stack:
(
0 CoreFoundation 0x00000001116f98db __exceptionPreprocess + 331
1 libobjc.A.dylib 0x00000001104e3ac5 objc_exception_throw + 48
2 CoreFoundation 0x00000001116f9735 +[NSException raise:format:] + 197
3 Foundation 0x000000010fb538f6 -[NSConcreteAttributedString initWithString:] + 135
4 Foundation 0x000000010fb539e9 -[NSConcreteAttributedString initWithString:attributes:] + 27
5 CocoaMarkdown 0x000000010f9669f8 -[CMAttributedStringRenderer appendString:] + 152
6 CocoaMarkdown 0x000000010f963a5b -[CMAttributedStringRenderer parser:foundText:] + 315
7 CocoaMarkdown 0x000000010f94a9ca -[CMParser handleNode:event:] + 778
8 CocoaMarkdown 0x000000010f94a567 __17-[CMParser parse]_block_invoke + 151
9 CocoaMarkdown 0x000000010f949eb7 -[CMIterator enumerateUsingBlock:] + 487
10 CocoaMarkdown 0x000000010f94a484 -[CMParser parse] + 244
11 CocoaMarkdown 0x000000010f96370b -[CMAttributedStringRenderer render] + 315
12 Example-iOS 0x000000010f5b9325 $s11Example_iOS14ViewControllerC11viewDidLoadyyF + 1765
13 Example-iOS 0x000000010f5b9784 $s11Example_iOS14ViewControllerC11viewDidLoadyyFTo + 36
14 UIKitCore 0x000000011978e0f7 -[UIViewController loadViewIfRequired] + 1183
15 UIKitCore 0x000000011978e524 -[UIViewController view] + 27
16 UIKitCore 0x0000000119dc722b -[UIWindow addRootViewControllerViewIfPossible] + 122
17 UIKitCore 0x0000000119dc791f -[UIWindow _setHidden:forced:] + 289
18 UIKitCore 0x0000000119dda57e -[UIWindow makeKeyAndVisible] + 42
19 UIKitCore 0x0000000119d8a33c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4555
20 UIKitCore 0x0000000119d8f4e6 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1617
21 UIKitCore 0x00000001195d3a4e __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 904
22 UIKitCore 0x00000001195dc346 +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
23 UIKitCore 0x00000001195d3664 -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
24 UIKitCore 0x00000001195d3fc0 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 1091
25 UIKitCore 0x00000001195d2332 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 782
26 UIKitCore 0x00000001195d1fe9 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
27 UIKitCore 0x00000001195d6d2e __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 576
28 UIKitCore 0x00000001195d7988 _performActionsWithDelayForTransitionContext + 100
29 UIKitCore 0x00000001195d6a95 -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
30 UIKitCore 0x00000001195dba48 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
31 UIKitCore 0x0000000119d8ddc8 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 514
32 UIKitCore 0x000000011994502f -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
33 FrontBoardServices 0x000000011cbead25 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 448
34 FrontBoardServices 0x000000011cbf4ad6 __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 283
35 FrontBoardServices 0x000000011cbf4300 __40-[FBSWorkspace _performDelegateCallOut:]_block_invoke + 53
36 libdispatch.dylib 0x0000000112a21db5 _dispatch_client_callout + 8
37 libdispatch.dylib 0x0000000112a252ba _dispatch_block_invoke_direct + 300
38 FrontBoardServices 0x000000011cc260da FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 30
39 FrontBoardServices 0x000000011cc25d92 -[FBSSerialQueue _performNext] + 451
40 FrontBoardServices 0x000000011cc26327 -[FBSSerialQueue _performNextFromRunLoopSource] + 42
41 CoreFoundation 0x0000000111660db1 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
42 CoreFoundation 0x0000000111660633 __CFRunLoopDoSources0 + 243
43 CoreFoundation 0x000000011165acef __CFRunLoopRun + 1231
44 CoreFoundation 0x000000011165a4d2 CFRunLoopRunSpecific + 626
45 GraphicsServices 0x0000000115ebd2fe GSEventRunModal + 65
46 UIKitCore 0x0000000119d90fc2 UIApplicationMain + 140
47 Example-iOS 0x000000010f5ba9eb main + 75
48 libdyld.dylib 0x0000000112a96541 start + 1
49 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

[indragiek]

I'm unable to reproduce this issue, I made a fresh clone of the repo after the #49 merge and ran both apps, I see the following:

Could you try cloning a new copy of the repo & cleaning your build artifacts (delete DerivedData)?

[tsfischer]

Good to know... I will try this!

[tsfischer]

Yeah that worked now. Thanks and sorry for the false report.