Crashing bug in iOS8 with UICollectionview, related to UIApplicationAccessibility -


i have app displays uicollectionview on page, works fine in ios7 crashes hard in ios8 tracelog points uicollectionviewaccessibility , uiapplicationaccessibility, though have no code touches accessibility @ all.

i have managed isolate problem , put small app reproduces crash here.

http://github.com/beno/ios8bug

i find hard comprehend code kind of glaring bug ship, looks did. have filed bug apple, no response far. more info or workaround appreciated.

sample trace:

thread 1queue : com.apple.main-thread (serial) #0  0x0343d385 in cfhash () #1  0x0109c264 in nskeyvalueaccessorhash () #2  0x03436373 in cfbasichashfindbucket () #3  0x0346294b in cfsetgetvalue () #4  0x0109f316 in -[nsobject(nskeyvaluecoding) valueforkey:] () #5  0x10ba246e in -[nsobject(uiaccessibilitysafecategory) safevalueforkey:] () #6  0x10d1f359 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #7  0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #8  0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #9  0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #10 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #11 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #12 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #13 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #14 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #15 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () #16 0x10d1f376 in -[uicollectionviewaccessibility _accessibilitydescendantelementatindexpathisvalid:] () ....

for finding this, bug regression flaw in accessibility acts way when view it's own delegate (like had configured). use different delegate answer.


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