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Archived Forum PostQuestion:
Update: See my answer below, it was my bug.
This is with the latest production (not pre-release) 9.5.0 version, on iOS 7.1.2. I've confirmed the from-path exists and is valid.
I'm assuming an EXC_BAD_ACCESS in a destructor is a bug rather than user error…
LogContextExitor::~LogContextExitor():
0x426ca4: push {r4, r7, lr}
0x426ca6: mov r4, r0
0x426ca8: movw r0, #0x9fe6
0x426cac: movt r0, #0x7b
0x426cb0: add r7, sp, #0x4
0x426cb2: add r0, pc
0x426cb4: adds r0, #0x8
0x426cb6: str r0, [r4]
0x426cb8: ldr r0, [r4, #0x4]
0x426cba: cbz r0, 0x426cc2 ; LogContextExitor::~LogContextExitor() + 30
0x426cbc: ldr r1, [r0]
0x426cbe: ldr r1, [r1, #0x2c]
0x426cc0: blx r1
0x426cc2: movs r0, #0x0
0x426cc4: str r0, [r4, #0x4]
0x426cc6: mov r0, r4
0x426cc8: pop {r4, r7, pc}
0x426cca: mov r8, r8
-[CkoCrypt2 CkDecryptFile:destFile:]:
0xcc33c: push {r4, r5, r6, r7, lr}
0xcc33e: add r7, sp, #0xc
0xcc340: str r8, [sp, #-4]!
0xcc344: mov r8, r0
0xcc346: movw r0, #0xabc8
0xcc34a: movt r0, #0xba
0xcc34e: mov r4, r3
0xcc350: add r0, pc
0xcc352: ldr r6, [r0]
0xcc354: mov r0, r2
0xcc356: mov r1, r6
0xcc358: blx 0xa1ba94 ; symbol stub for: objc_msgSend
0xcc35c: mov r5, r0
0xcc35e: mov r0, r4
0xcc360: mov r1, r6
0xcc362: blx 0xa1ba94 ; symbol stub for: objc_msgSend
0xcc366: mov r2, r0
0xcc368: movw r0, #0x9c9a
0xcc36c: movt r0, #0xbb
0xcc370: mov r1, r5
0xcc372: add r0, pc
0xcc374: ldr r0, [r0]
0xcc376: ldr.w r0, [r8, r0]
0xcc37a: bl 0x15ff24 ; CkCrypt2::CkDecryptFile(char const*, char const*)
0xcc37e: ldr r8, [sp], #4
0xcc382: pop {r4, r5, r6, r7, pc}
Never mind, my bug. I was releasing the CkoCrypt2 object on a different thread to the serial queue where I was using it…