15459068: UITextView crashes on a combination of Unicode characters

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Description

Summary:
When you call -[UITextView setText:] with certain combinations of Arabic/Indic characters it crashes.

(lldb) bt

• thread 22108400: Swift 2.0b4: Allow if let and guard let to assign to self in failable value type initializers #1: tid = 0x20ef2, 0x3641c704 UIFoundation-[NSATSLineFragment saveWithGlyphOrigin:] + 3476, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=1, address=0x3f18953c) frame #0: 0x3641c704 UIFoundation-[NSATSLineFragment saveWithGlyphOrigin:] + 3476
  frame 22108400: Swift 2.0b4: Allow if let and guard let to assign to self in failable value type initializers #1: 0x364130a6 UIFoundation-[NSATSTypesetter _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:] + 4170 frame #2: 0x364139b2 UIFoundation-[NSATSTypesetter layoutParagraphAtPoint:] + 158
  frame 22108354: Swift 2.0b4: Curried initializer syntax #3: 0x3645fe00 UIFoundation-[NSTypesetter _layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex:] + 3564 frame #4: 0x36460d4c UIFoundation-[NSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 212
  frame 22108118: Apple Music: No Love Icon On CarPlay #5: 0x36414310 UIFoundation-[NSATSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 540 frame #6: 0x36402c02 UIFoundation-[NSLayoutManager(NSPrivate) _fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:] + 1138
  frame 22107493: Xocde 7, can't run playground. Unable to create target for stub executable. unable to find executable for #7: 0x36408416 UIFoundation_NSFastFillAllLayoutHolesForGlyphRange + 1214 frame #8: 0x364069aa UIFoundation-[NSLayoutManager(NSPrivate) _rectArrayForRange:withinSelectionRange:rangeIsCharRange:singleRectOnly:fullLineRectsOnly:inTextContainer:rectCount:rangeWithinContainer:glyphsDrawOutsideLines:rectArray:rectArrayCapacity:] + 650
  frame 22107374: Xcode should mark debugging messages originating from the main thread #9: 0x36408aa4 UIFoundation-[NSLayoutManager(NSPrivate) _rectArrayForRange:withinSelectionRange:rangeIsCharRange:singleRectOnly:fullLineRectsOnly:inTextContainer:rectCount:rangeWithinContainer:glyphsDrawOutsideLines:] + 84 frame #10: 0x36435858 UIFoundation-[NSLayoutManager rectArrayForCharacterRange:withinSelectedCharacterRange:inTextContainer:rectCount:] + 60
  frame 22106545: automaticallyAdjustsScrollViewInsets doesn't change insets on iOS 9 #11: 0x313cd078 UIKit-[_UITextContainerView updateInsertionPointStateAndRestartTimer:] + 244 frame #12: 0x3640c35a UIFoundation-[NSLayoutManager(NSPrivate) _invalidateLayoutForExtendedCharacterRange:isSoft:invalidateUsage:] + 1966
  frame 22105831: Application windows move erratically with two monitors #13: 0x3640c3ce UIFoundation-[NSLayoutManager(NSPrivate) _invalidateLayoutForExtendedCharacterRange:isSoft:] + 30 frame #14: 0x364325b2 UIFoundation-[NSLayoutManager textStorage:edited:range:changeInLength:invalidatedRange:] + 210
  frame 22104678: Xcode7-beta4 (7A165t): libtool does not support -ios_version_min link editor flag #15: 0x36432758 UIFoundation-[NSLayoutManager processEditingForTextStorage:edited:range:changeInLength:invalidatedRange:] + 52 frame #16: 0x3645378a UIFoundation-[NSTextStorage _notifyEdited:range:changeInLength:invalidatedRange:] + 122
  frame 22103812: TestFlight does not support yet apps with watchOS 2 #17: 0x3645331e UIFoundation-[NSTextStorage processEditing] + 422 frame #18: 0x36452f0c UIFoundation-[NSTextStorage endEditing] + 80
  frame 22102418: El Capitan Terminal password autofill suggestion #19: 0x313cf05c UIKit-[UITextView setAttributedText:] + 252 frame #20: 0x313cef4a UIKit-[UITextView setText:] + 134

Steps to Reproduce:
I haven't pinpointed the exact combination, but I've reduced it to a 935 character string that crashes always. Run the included sample project

Expected Results:

Actual Results:

Version:
7.0.3

Notes:

Configuration:
Crashes on iPad, iPhone and simulator

Attachments:
https://cloudup.com/c9P9Mw4qTdm

Product Version: 7.0.3
Created: 2013-11-13T16:31:17.372386
Originated: 2013-11-13T17:24:00
Open Radar Link: http://www.openradar.me/15459068