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how can I get info from "vec_ycc_bgrx_convert" crash?
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how can I get info from "vec_ycc_bgrx_convert" crash?

  • Subject: how can I get info from "vec_ycc_bgrx_convert" crash?
  • From: vipgs99 <email@hidden>
  • Date: Wed, 18 Jun 2014 01:26:19 +0800
I've got lots of crash like this below:

   Thread : Crashed: com.apple.main-thread
   0  ImageIO                        0x30c808fc vec_ycc_bgrx_convert + 427
   1  ???                            0x27d440d0
   2  ImageIO                        0x30c80707 sep_upsample + 170
   3  ImageIO                        0x30cc3dfb
   process_data_simple_main + 94
   4  ImageIO                        0x30c7f5df _cg_jpeg_read_scanlines
   + 82
   5  ImageIO                        0x30c7d6f7 copyImageBlockSetJPEG +
   3262
   6  ImageIO                        0x30c66779
   ImageProviderCopyImageBlockSetCallback + 528
   7  CoreGraphics                   0x2ffa347d
   CGImageProviderCopyImageBlockSetWithOptions + 136
   8  QuartzCore                     0x323eef59
   CA::Render::create_image(CGImage*, CGColorSpace*, unsigned int) + 680
   9  QuartzCore                     0x323ee409
   CA::Render::copy_image(CGImage*, CGColorSpace*, unsigned int,
   double) + 292
   10 QuartzCore                     0x323c766d
   -[CALayer(CALayerPrivate) _copyRenderLayer:layerFlags:commitFlags:]
   + 484
   11 QuartzCore                     0x323c7481
   CA::Layer::copy_render_layer(CA::Transaction*, unsigned int,
   unsigned int*) + 32
   12 QuartzCore                     0x323c741b
   CA::Context::commit_layer(CA::Layer*, unsigned int, unsigned int,
   void*) + 94
   13 QuartzCore                     0x323c43fb
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 314
   14 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   15 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   16 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   17 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   18 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   19 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   20 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   21 QuartzCore                     0x323c4399
   CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*,
   unsigned int, unsigned int, void*), void*) + 216
   22 QuartzCore                     0x323c2719
   CA::Context::commit_transaction(CA::Transaction*) + 1048
   23 QuartzCore                     0x323c21f7
   CA::Transaction::commit() + 314
   24 UIKit                          0x329ac2c9
   _UIWindowUpdateVisibleContextOrder + 208
   25 UIKit                          0x329ac15d +[UIWindow
   _prepareWindowsPassingTestForAppResume:] + 16
   26 UIKit                          0x32951539 -[UIApplication
   _handleApplicationResumeEvent:] + 76
   27 UIKit                          0x32750613 -[UIApplication
   handleEvent:withNewEvent:] + 1882
   28 UIKit                          0x3274fdf9 -[UIApplication
   sendEvent:] + 72
   29 UIKit                          0x327b4405
   _UIApplicationHandleEvent + 616
   30 GraphicsServices               0x34dbdb55 _PurpleEventCallback + 608
   31 GraphicsServices               0x34dbd73f PurpleEventCallback + 34
   32 CoreFoundation                 0x2fee6847
   __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
   33 CoreFoundation                 0x2fee67e3 __CFRunLoopDoSource1 + 346
   34 CoreFoundation                 0x2fee4faf __CFRunLoopRun + 1406
   35 CoreFoundation                 0x2fe4f769 CFRunLoopRunSpecific + 524
   36 CoreFoundation                 0x2fe4f54b CFRunLoopRunInMode + 106
   37 GraphicsServices               0x34dbc6d3 GSEventRunModal + 138
   38 UIKit                          0x327ae891 UIApplicationMain + 1136
   39 myApp                      0x001cedd9 main (main.m:26)
I can know only that some jpeg files are wrong to render on screen, but how can I know which one or where the crash happed?
The common backtrace is from CA::Layer::commit_if_needed to vec_ycc_bgrx_convert. I've got lots of crash logs from user, but I can't reproduce it, anyone can help? 
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