App crashes while using custom fonts in iOS 9 beta 5

Question

My app is in app store which supports iOS 7.1.2 to iOS 8.4 and it is working fine till 8.4 version. When I tried to run the same app on iOS 9 beta 5 its getting crashed.It was working fine in iOS 9 beta 4. After debugging I found that the crash is due to the custom font we have used in our app. Is this the problem with iOs 9 beta 5 ? What should I do to support my app on iOS 9.0 main release which will be expecting in a week.

Below is the stack trace of crash

• thread #1: tid = 0x6d68, 0x0000000184d6e1a4 CoreTextOTL::GPOS::ApplyPairPos(OTL::LookupSubtable const*, OTL::TGlyphIterator&, OTL::Coverage const&) const + 636, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x3020451cc) frame #0: 0x0000000184d6e1a4 CoreTextOTL::GPOS::ApplyPairPos(OTL::LookupSubtable const*, OTL::TGlyphIterator&, OTL::Coverage const&) const + 636 frame #1: 0x0000000184d72b14 CoreTextOTL::GPOS::ApplyLookupSubtable(OTL::Lookup const&, unsigned int, OTL::LookupSubtable const*, OTL::TGlyphIterator&, OTL::Coverage const&) const + 116 frame #2: 0x0000000184d81690 CoreTextOTL::GPOS::ApplyLookups(TRunGlue&, int, OTL::GlyphLookups&) const + 544 frame #3: 0x0000000184d80dc0 CoreTextTOpenTypePositioningEngine::PositionRuns(SyncState&, KerningStatus&) + 628 frame #4: 0x0000000184cea7b4 CoreTextTKerningEngine::PositionGlyphs(TRunGlue&, ShapingType, AnnexTableFlag) + 188 frame #5: 0x0000000184ce90a4 CoreTextCTFontTransformGlyphs + 440 frame #6: 0x000000019504c85c UIFoundation__NSStringDrawingEngine + 8788 frame #7: 0x000000019504a5bc UIFoundation-[NSString(NSExtendedStringDrawing) boundingRectWithSize:options:attributes:context:] + 156 frame #8: 0x0000000189731724 UIKit-[UILabel _textRectForBounds:limitedToNumberOfLines:includingShadow:] + 780 frame #9: 0x000000018973137c UIKit-[UILabel _intrinsicSizeWithinSize:] + 132 frame #10: 0x000000018982c548 UIKit-[UILabel intrinsicContentSize] + 72 frame #11: 0x000000018982c3a8 UIKit-[UIView(UIConstraintBasedLayout) _generateContentSizeConstraints] + 48 frame #12: 0x000000018982bdbc UIKit-[UIView(UIConstraintBasedLayout) _updateContentSizeConstraints]
• 588 frame #13: 0x0000000189827e5c UIKit-[UIView(AdditionalLayoutSupport) updateConstraints] + 244 frame #14: 0x000000018982bb60 UIKit-[UILabel updateConstraints] + 220 frame #15: 0x0000000189f28c8c UIKit`-[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 460 frame #16: 0x0000000189f28ef4 UIKit`-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 200 frame #17: 0x0000000189f28bbc UIKit`-[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 252 frame #18: 0x00000001850b0c00 Foundation-[NSISEngine withBehaviors:performModifications:] + 168 frame #19: 0x000000018982ab78 UIKit-[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 64 frame #20: 0x0000000189f28ec8 UIKit`-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 156 frame #21: 0x0000000189f28bbc UIKit`-[UIView(AdditionalLayoutSupport) _internalUpdateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 252 frame #22: 0x0000000189f28ef4 UIKit`-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededAccumulatingViewsNeedingSecondPassAndViewsNeedingBaselineUpdate:forSecondPass:]
• 200 frame #23: 0x000000018982ba5c UIKit__60-[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded]_block_invoke + 100 frame #24: 0x00000001850b0c00 Foundation-[NSISEngine withBehaviors:performModifications:] + 168 frame #25: 0x000000018982ab78 UIKit-[UIView(AdditionalLayoutSupport) _withAutomaticEngineOptimizationDisabledIfEngineExists:] + 64 frame #26: 0x000000018982b690 UIKit-[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded] + 244 frame #27: 0x0000000189848094 UIKit-[UIWindow(UIConstraintBasedLayout) updateConstraintsIfNeeded] + 108 frame #28: 0x0000000189f29598 UIKit-[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeeded] + 268 frame #29: 0x0000000189a27808 UIKit-[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 176 frame #30: 0x0000000189722640 UIKit-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 688 frame #31: 0x0000000188f31f14 QuartzCore-[CALayer layoutSublayers] + 148 frame #32: 0x0000000188f2cb20 QuartzCoreCA::Layer::layout_if_needed(CA::Transaction*) + 292 frame #33: 0x0000000188f2c9e0 QuartzCoreCA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32 frame #34: 0x0000000188f2c07c QuartzCoreCA::Context::commit_transaction(CA::Transaction*) + 252 frame #35: 0x0000000188f2bdd0 QuartzCoreCA::Transaction::commit() + 516 frame #36: 0x0000000188f254bc QuartzCoreCA::Transaction::observer_callback(CFRunLoopObserver*, unsigned long, void*) + 80 frame #37: 0x00000001841cc768 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION
• 32 frame #38: 0x00000001841ca50c CoreFoundation__CFRunLoopDoObservers + 372 frame #39: 0x00000001840f98c0 CoreFoundationCFRunLoopRunSpecific + 416 frame #40: 0x00000001897931ec UIKit-[UIApplication _run] + 460 frame #41: 0x000000018978e0d4 UIKitUIApplicationMain + 204 * frame #42: 0x000000010004eb08 SampleFontmain(argc=1, argv=0x000000016fdb7af0) + 124 at main.m:14 frame #43: 0x00000001994ae8b8 libdyld.dylibstart + 4