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POOccasionally iOS 6 MKMapView crashes in initWithFrame
 

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  1. POOccasionally iOS 6 MKMapView crashes in initWithFrame
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    <p>I've an app on the apple store and after the iOS6 update I've got hundred of crash report within <code>MKMapView</code>. I cannot manage to reproduce the crash on my devices. It looks like a problem with <code>EAGLContext</code>. We don't use OpenGL in our app but we have more than one instances of <code>MKMapView</code> in different controller. I've found a similar issue here <a href="https://stackoverflow.com/questions/12670528/ios-6-app-crashes-in-eaglcontext-when-displaying-maps">iOS 6 app crashes in EAGLContext when displaying maps</a> but they use OpenGL.</p> <p>Here there is the backtrace:</p> <pre><code>Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0x1 Crashed Thread: 0 Thread 0 Crashed: 0 libGPUSupportMercury.dylib 0x00000e22 gpus_ReturnNotPermittedKillClient + 10 1 libGPUSupportMercury.dylib 0x3bccc5fb gldCreateContext + 190 2 GLEngine 0x344c2b15 gliCreateContextWithShared + 676 3 OpenGLES 0x0000491d -[EAGLContext initWithAPI:properties:] + 1433 4 OpenGLES 0x000042d7 -[EAGLContext initWithAPI:sharedWithCompute:] + 143 5 VectorKit 0x00011c81 -[VGLGPU init] + 105 6 VectorKit 0x000d4659 __24+[VGLGPU sharedInstance]_block_invoke_0 + 49 7 libdispatch.dylib 0x000014b7 _dispatch_client_callout + 23 8 libdispatch.dylib 0x000073f7 dispatch_once_f$VARIANT$mp + 43 9 VectorKit 0x00011c13 +[VGLGPU sharedInstance] + 39 10 VectorKit 0x00001db1 -[VKMainLoop updateLinkState] + 485 11 VectorKit 0x00001955 -[VKScreenCanvas _updateDisplayStatus:] + 109 12 UIKit 0x0001c371 -[UIView initWithFrame:] + 129 13 VectorKit 0x00010ca5 -[VGLScreenCanvas initWithFrame:context:] + 53 14 VectorKit 0x00010a7d -[VKScreenCanvas initWithFrame:context:] + 57 15 VectorKit 0x00010a3f -[VKScreenCanvas initWithFrame:] + 39 16 VectorKit 0x000106bd -[VKMapCanvas initWithFrame:shouldRasterize:] + 65 17 VectorKit 0x000104bb -[VKMapView initWithFrame:andGlobe:shouldRasterize:] + 647 18 MapKit 0x0000dc95 -[MKMapView _commonInitAndEnableLoading:fromIB:] + 725 19 MapKit 0x0000d811 -[MKMapView initWithFrame:] + 257 ..... </code></pre>
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    1. COAre you sure that it is not because of memory leak? I'm experiencing a similar problem but I've already identified the cause. The iOS 6 MKMapView is taking 10x more memory than the previous one. My App is all about showing stuffs on maps and its footprint increased from 30MB to 280MB. I'm trying to solve it, but no clue yet.
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    2. COHi @trein, the exception is SIGSEGV, from what I understand this should be caused by a bad memory access.
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