Question

I’m trying to determine what’s causing a crash I’m seeing while testing my app. It now throws EXEC_BAD_ACCESS (code=1, address=0x1) each time I try to run the app from xcode with the iphone connected.

The app crashes but I don’t see a new entry in the crash log.I’ve tried running with Zombies enabled but I get the same crash.

Weird thing is if I debug with the simulator, run the app on the device by tapping its icon, or even in Instruments, I don’t get this error. Any suggestion and/or explanation would be very much appreciated.

Here’s what I see in Xcode:

libobjc.A.dylib`objc_msgSend:
0x36acb5c0:  teq.w  r0, #0
0x36acb5c4:  beq    0x36acb606                ; objc_msgSend + 70
0x36acb5c6:  push.w {r3, r4}

**0x36acb5ca:  ldr    r4, [r0]**  < ------ This is where the app gets caught up EXEC_BAD_ACCESS (code=1, address=0x1)

0x36acb5cc:  lsr.w  r9, r1, #2
0x36acb5d0:  ldr    r3, [r4, #8]
0x36acb5d2:  add.w  r3, r3, #8
0x36acb5d6:  ldr    r12, [r3, #-8]
0x36acb5da:  and.w  r9, r9, r12
0x36acb5de:  ldr.w  r4, [r3, r9, lsl #2]
0x36acb5e2:  teq.w  r4, #0
0x36acb5e6:  add.w  r9, r9, #1
0x36acb5ea:  beq    0x36acb600                ; objc_msgSend + 64
0x36acb5ec:  ldr.w  r12, [r4]
0x36acb5f0:  teq.w  r1, r12
0x36acb5f4:  bne    0x36acb5d6                ; objc_msgSend + 22
0x36acb5f6:  ldr.w  r12, [r4, #8]
0x36acb5fa:  pop.w  {r3, r4}
0x36acb5fe:  bx     r12
0x36acb600:  pop.w  {r3, r4}
0x36acb604:  b      0x36acb620                ; objc_msgSend_uncached
0x36acb606:  mov.w  r1, #0
0x36acb60a:  bx     lr
0x36acb60c:  nop    
0x36acb60e:  nop    
0x36acb610:  nop    
0x36acb612:  nop    
0x36acb614:  nop    
0x36acb616:  nop    
0x36acb618:  nop    
0x36acb61a:  nop    
0x36acb61c:  nop    
0x36acb61e:  nop 

Answer 1

When in doubt, reboot your device. Works fine now. Could not isolate what was causing the error.