Following is the stack trace from Crashlytics, it crashes when text view's frame height is set:
(I got EXC_BAD_ACCESS KERN_INVALID_ADDRESS and SIGABRT ABORT crash at the same line @objc UIView.height.setter (UIView+.swift))
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000000000000000d
Crashed: com.apple.main-thread
0 CoreText 0x194d24cd8 TOpenTypeMorph::SetLookups(OTL::GSUB&, unsigned int const*, OTL::GlyphLookups&) + 200
1 CoreText 0x194d24dd4 TOpenTypeMorph::SetLookups(OTL::GSUB&, unsigned int const*, OTL::GlyphLookups&) + 452
2 CoreText 0x194d25a40 void TOpenTypeMorph::ApplyShapingEngine<TInlineVector<unsigned int, 30ul> >(OTL::GSUB&, OTL::GlyphLookups&, unsigned int*, CFRange, TInlineVector<unsigned int, 30ul>&, SyncState&) + 1620
3 CoreText 0x194d24fac TOpenTypeMorph::ShapeGlyphs(SyncState&) + 340
4 CoreText 0x194cc4a4c TShapingEngine::ShapeGlyphs(TLine&, TCharStream const&) + 224
5 CoreText 0x194c8fa48 TTypesetter::TTypesetter(__CFArray const*, __CFString const*, void const* (*)(__CTRun const*, __CFString const*, void*), void*) + 188
6 CoreText 0x194c8f860 CTTypesetterCreateWithRunArray + 88
7 UIFoundation 0x197dffbb4 -[NSATSGlyphStorage createCTTypesetter] + 1512
8 UIFoundation 0x197dfa960 -[NSATSTypesetter _ctTypesetter] + 296
9 UIFoundation 0x197e03b14 -[NSATSLineFragment layoutForStartingGlyphAtIndex:characterIndex:minPosition:maxPosition:lineFragmentRect:] + 128
10 UIFoundation 0x197dfb534 -[NSATSTypesetter _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:] + 2316
11 UIFoundation 0x197dfcaf8 -[NSATSTypesetter layoutParagraphAtPoint:] + 160
12 UIFoundation 0x197e53980 -[NSTypesetter _layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex:] + 5692
13 UIFoundation 0x197e53da4 -[NSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 244
14 UIFoundation 0x197dfd558 -[NSATSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 448
15 UIFoundation 0x197de968c -[NSLayoutManager(NSPrivate) _fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:] + 1116
16 UIFoundation 0x197deb180 -[NSLayoutManager(NSPrivate) _fillLayoutHoleAtIndex:desiredNumberOfLines:] + 196
17 UIFoundation 0x197deb8b4 -[NSLayoutManager(NSPrivate) _markSelfAsDirtyForBackgroundLayout:] + 344
18 UIFoundation 0x197df477c -[NSLayoutManager(NSPrivate) _invalidateLayoutForExtendedCharacterRange:isSoft:invalidateUsage:] + 2292
19 UIFoundation 0x197e1dee8 -[NSLayoutManager textContainerChangedGeometry:] + 332
20 UIFoundation 0x197e40220 -[NSTextContainer setSize:] + 160
21 UIKit 0x197f74508 _UITextContainerViewResyncNSTextContainer + 264
22 UIKit 0x19890198c __64-[_UITextContainerView _setFrameOrBounds:oldRect:settingAction:]_block_invoke + 52
23 UIKit 0x198901878 -[_UITextContainerView _setFrameOrBounds:oldRect:settingAction:] + 308
24 UIKit 0x197f7436c -[_UITextContainerView setFrame:] + 188
25 UIKit 0x1988ee64c -[UITextView _resyncContainerFrameForNonAutolayoutDeferringSizeToFit:] + 644
26 UIKit 0x1988ef1b4 -[UITextView _setFrameOrBounds:fromOldRect:settingAction:] + 500
27 UIKit 0x197f73bf8 -[UITextView setFrame:] + 188
28 MyAppCore 0x1024ac944 @objc UIView.height.setter (UIView+.swift)
29 MyAppShell 0x1030a1cbc MyAppTextBaseCell.setSubviewFrames() -> () (MyAppTextBaseCell.swift)
30 MyAppShell 0x1059254e0 MyAppCollectionViewCell.layoutSubviews() -> () (MyAppCollectionViewCell.swift:215)
31 MyAppShell 0x1059255d4 @objc MyAppCollectionViewCell.layoutSubviews() -> () (MyAppCollectionViewCell.swift)
32 UIKit 0x197ec6220 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1196
33 QuartzCore 0x195386188 -[CALayer layoutSublayers] + 148
34 QuartzCore 0x19537ae64 CA::Layer::layout_if_needed(CA::Transaction*) + 292
35 UIKit 0x197edac90 -[UIView(Hierarchy) layoutBelowIfNeeded] + 1020
36 MyAppLib 0x100b56ea4 -[MyAppImpressionTracker reloadViewPortCellsWithCompletion:] (MyAppImpressionTracker.m:59)
37 MyAppLib 0x100b65f0c -[MyAppTracker viewPortWillRefresh:withReloadDataCompletion:] (MyAppTracker.m:150)
38 MyAppShell 0x1030d3440 MyAppViewController.reloadData() -> () (MyAppViewController.swift)
39 MyAppFeed 0x102a85ad4 MyAppViewController.providerHasUpdated(fromCache : Bool, hasInitialUpdates : Bool) -> () (MyAppViewController.swift)
40 MyAppFeed 0x102a85c80 @objc MyAppViewController.providerHasUpdated(fromCache : Bool, hasInitialUpdates : Bool) -> () (MyAppViewController.swift)
41 MyAppFeed 0x102a53030 protocol witness for MyAppProviderDelegate.providerHasUpdated(fromCache : Bool, hasInitialUpdates : Bool) -> () in conformance MyAppViewController (MyAppCellViewModel.swift)
42 MyAppFeed 0x102b35c84 specialized MyAppProvider.(updateSectionProviders(Bool, hasInitialUpdates : Bool, completion : () -> ()?) -> ()).(closure #2) (MyAppProvider.swift)
43 MyAppFeed 0x102b32380 partial apply for MyAppProvider.(updateSectionProviders(Bool, hasInitialUpdates : Bool, completion : () -> ()?) -> ()).(closure #2) (MyAppProvider.swift)
44 MyAppCore 0x10246188c partial apply for static GCD.(dispatchAsyncMyAppOperationQueue(() -> (), thenOnMainQueue : () -> ()?) -> ()).(closure #1).(closure #1) (QueueHelper.swift)
45 libdispatch.dylib 0x190ef9200 _dispatch_call_block_and_release + 24
46 libdispatch.dylib 0x190ef91c0 _dispatch_client_callout + 16
47 libdispatch.dylib 0x190efdd6c _dispatch_main_queue_callback_4CF + 1000
48 CoreFoundation 0x19201bf2c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
49 CoreFoundation 0x192019b18 __CFRunLoopRun + 1660
50 CoreFoundation 0x191f48048 CFRunLoopRunSpecific + 444
51 GraphicsServices 0x1939ce198 GSEventRunModal + 180
52 UIKit 0x197f342fc -[UIApplication _run] + 684
53 UIKit 0x197f2f034 UIApplicationMain + 208
54 MyApp 0x1000b344c main (AppDelegate.swift:27)
55 libdispatch.dylib 0x190f2c5b8 (Missing)
As the crash logs are related to Glyph, it seems to be happening for some weird character/symbol may be in language other than english.
I have not been able to repro this crash, can someone please provide any pointer.
This is happening because of jña telugu character being received. It is an issue with older ios versions though. See this video.