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Unrecognized selector in release build, not in debug build
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Unrecognized selector in release build, not in debug build


  • Subject: Unrecognized selector in release build, not in debug build
  • From: Rick Mann <email@hidden>
  • Date: Tue, 09 Jul 2013 18:39:39 -0700

I'm having a hard time tracking this down:

Jul  9 18:33:10 iPad-4G-64GB MatterScan[189] <Error>: -[__NSArrayI removeObject:]: unrecognized selector sent to instance 0x1f097040

It only happens in release builds, and the call stack shown in Xcode while debugging shows no source. I can't figure out where the call is:

#0	0x39f9f960 in objc_exception_throw ()
#1	0x320fee06 in -[NSObject(NSObject) doesNotRecognizeSelector:] ()

libobjc.A.dylib`objc_exception_throw:
0x39f9f960:  push   {r4, r5, r6, r7, lr}
0x39f9f962:  add    r7, sp, #12
0x39f9f964:  mov    r4, r0
0x39f9f966:  movs   r0, #16
0x39f9f968:  blx    0x39fab854                ; symbol stub for: -[NSObject isEqual:]
0x39f9f96c:  mov    r5, r0
0x39f9f96e:  movw   r0, #29278
0x39f9f972:  movt   r0, #507
0x39f9f976:  add    r0, pc
0x39f9f978:  ldr    r1, [r0]
0x39f9f97a:  mov    r0, r4
0x39f9f97c:  blx    r1
0x39f9f97e:  movw   r1, #29226
0x39f9f982:  mov    r6, r5
0x39f9f984:  movt   r1, #507
0x39f9f988:  str    r0, [r5]
0x39f9f98a:  add    r1, pc
0x39f9f98c:  add.w  r0, r1, #8
0x39f9f990:  str    r0, [r6, #4]!
0x39f9f994:  mov    r0, r4
0x39f9f996:  bl     0x39f9b8d8                ; object_getClassName
0x39f9f99a:  str    r0, [r5, #8]
0x39f9f99c:  movs   r0, #0
0x39f9f99e:  cmp    r4, #0
0x39f9f9a0:  it     ne
0x39f9f9a2:  ldrne  r0, [r4]
0x39f9f9a4:  str    r0, [r5, #12]
0x39f9f9a6:  mov    r0, r4
0x39f9f9a8:  nop
0x39f9f9aa:  nop
0x39f9f9ac:  movw   r2, #5
0x39f9f9b0:  mov    r0, r5
0x39f9f9b2:  movt   r2, #0
0x39f9f9b6:  mov    r1, r6
0x39f9f9b8:  add    r2, pc
0x39f9f9ba:  blx    0x39fab8a4                ; symbol stub for: +[NSObject instanceMethodForSelector:]
0x39f9f9be:  nop


I tried putting a symbolic breakpoint on -[__NSArrayI removeObject:], but it doesn't stop any earlier. I don't actually call remove-anything in my code anywhere.

Any suggestions? Thanks!


--
Rick




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