我们的某些用户由于以下堆栈跟踪而经历了一次非常奇怪的崩溃。用户启动应用程序时会发生这种情况。发生这种崩溃的设备很奇怪-所有运行iOS 12的iPhone 7手机。我的Google-fu完全使我失望。有没有其他人经历过这种情况并有纠正的方法？谢谢！
Crashed: com.apple.main-thread
0 CoreText 0x211894400 TFont::FindColorBitmapForGlyph(double, unsigned short, TsbixContext const&, unsigned long&, unsigned long&, unsigned char&, double&, double&) const + 280
1 CoreText 0x211894340 TFont::FindColorBitmapForGlyph(double, unsigned short, TsbixContext const&, unsigned long&, unsigned long&, unsigned char&, double&, double&) const + 88
2 CoreText 0x2118866a4 (anonymous namespace)::TCGImageData::TCGImageData(TFont const*, unsigned short, TsbixContext const&, CGContext*) + 352
3 CoreText 0x21188dfa0 DrawGlyphsAtPositions(TFont const*, unsigned short const*, CGPoint const*, unsigned long, CGContext*, CGAffineTransform, CGAffineTransform, bool)::$_9::operator()(CGAffineTransform, CGAffineTransform) const + 124
4 CoreText 0x2118890c8 DrawGlyphsAtPositions(TFont const*, unsigned short const*, CGPoint const*, unsigned long, CGContext*, CGAffineTransform, CGAffineTransform, bool) + 1252
5 CoreText 0x211886344 DrawGlyphsWithAdvancesAndTransform(TFont const*, unsigned short const*, CGSize const*, unsigned long, CGPoint, CGContext*, CGAffineTransform, CGAffineTransform, bool) + 340
6 CoreText 0x211887968 CTFontDrawGlyphsWithAdvancesInternal + 432
7 CoreText 0x211853978 TRun::DrawGlyphs(CGContext*, CFRange) const + 560
8 CoreText 0x21186afd0 TLine::DrawGlyphs(CGContext*) const + 184
9 UIFoundation 0x21817bcc4 -[NSCoreTypesetter _stringDrawingCoreTextEngineWithOriginalString:rect:padding:context:forceClipping:styledTextOptions:attributes:stringDrawingOptions:drawingContext:wantsTextLineFragments:validatedAttributedString:firstNonRenderedCharacterIndex:foundSoftHyphenAtEOL:enginePathUsed:] + 9976
10 UIFoundation 0x2181f8c74 __NSStringDrawingEngine + 3104
11 UIFoundation 0x21817c8d4 -[NSString(NSExtendedStringDrawing) drawWithRect:options:attributes:context:] + 164
12 UIKitCore 0x23b27cdc8 -[UILabel _drawTextInRect:baselineCalculationOnly:] + 4008
13 UIKitCore 0x23b27b680 -[UILabel drawTextInRect:] + 684
14 UIKitCore 0x23b30cda4 -[UIView(CALayerDelegate) drawLayer:inContext:] + 464
15 QuartzCore 0x21217570c -[CALayer drawInContext:] + 296
16 UIKitCore 0x23b2815e8 -[_UILabelContentLayer drawInContext:] + 168
17 QuartzCore 0x212056ca8 CABackingStoreUpdate_ + 176
18 QuartzCore 0x21217c28c invocation function for block in CA::Layer::display_() + 52
19 QuartzCore 0x212174fc4 -[CALayer _display] + 1540
20 UIKitCore 0x23b281524 -[_UILabelContentLayer display] + 124
21 QuartzCore 0x2120d9668 CA::Context::commit_transaction(CA::Transaction*) + 548
22 QuartzCore 0x212107ec8 CA::Transaction::commit() + 608
23 QuartzCore 0x212108d30 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 92
24 CoreFoundation 0x20db096bc __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
25 CoreFoundation 0x20db04350 __CFRunLoopDoObservers + 412
26 CoreFoundation 0x20db048f0 __CFRunLoopRun + 1264
27 CoreFoundation 0x20db040e0 CFRunLoopRunSpecific + 436
28 GraphicsServices 0x20fd7d584 GSEventRunModal + 100
29 UIKitCore 0x23ae64c00 UIApplicationMain + 212
30 MyApp 0x10258f6a0 main (AppDelegate.swift:21)
31 libdyld.dylib 0x20d5c2bb4 start + 4