Here is the stack trace with Zombie Objects enabled:
CoreFoundation`___forwarding___:
0x10fca0440 <+0>: pushq %rbp
0x10fca0441 <+1>: movq %rsp, %rbp
0x10fca0444 <+4>: pushq %r15
0x10fca0446 <+6>: pushq %r14
0x10fca0448 <+8>: pushq %r13
0x10fca044a <+10>: pushq %r12
0x10fca044c <+12>: pushq %rbx
0x10fca044d <+13>: subq $0x28, %rsp
0x10fca0451 <+17>: movq %rdi, %r15
0x10fca0454 <+20>: xorl %eax, %eax
0x10fca0456 <+22>: movq %rsi, -0x48(%rbp)
0x10fca045a <+26>: testq %rsi, %rsi
0x10fca045d <+29>: setne %al
0x10fca0460 <+32>: movq 0x2f8db1(%rip), %r14 ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca0467 <+39>: cmovneq 0x2f8dc1(%rip), %r14 ; (void *)0x000000010e5bc1c0: objc_msgSend_stret
0x10fca046f <+47>: movq 0x8(%r15,%rax,8), %rcx
0x10fca0474 <+52>: movq (%r15,%rax,8), %r13
0x10fca0478 <+56>: leaq (,%rax,8), %rbx
0x10fca0480 <+64>: testq %r13, %r13
0x10fca0483 <+67>: jns 0x10fca04ac ; <+108>
0x10fca0485 <+69>: movq %r13, %rax
0x10fca0488 <+72>: shrq $0x3c, %rax
0x10fca048c <+76>: andl $0x7, %eax
0x10fca048f <+79>: cmpq $0x7, %rax
0x10fca0493 <+83>: jne 0x10fca04a3 ; <+99>
0x10fca0495 <+85>: movq %r13, %rax
0x10fca0498 <+88>: shrq $0x34, %rax
0x10fca049c <+92>: movzbl %al, %eax
0x10fca049f <+95>: addq $0x8, %rax
0x10fca04a3 <+99>: testw %ax, %ax
0x10fca04a6 <+102>: je 0x10fca06e4 ; <+676>
0x10fca04ac <+108>: movq %r15, -0x40(%rbp)
0x10fca04b0 <+112>: movq %rbx, -0x30(%rbp)
0x10fca04b4 <+116>: movq %rcx, -0x38(%rbp)
0x10fca04b8 <+120>: movq %r13, %rdi
0x10fca04bb <+123>: callq 0x10fdd3936 ; symbol stub for: object_getClass
0x10fca04c0 <+128>: movq %r13, %r15
0x10fca04c3 <+131>: movq %rax, %r13
0x10fca04c6 <+134>: movq %r13, %rdi
0x10fca04c9 <+137>: callq 0x10fdd34e0 ; symbol stub for: class_getName
0x10fca04ce <+142>: movq %rax, %rbx
0x10fca04d1 <+145>: movq 0x330a60(%rip), %r12 ; “forwardingTargetForSelector:”
0x10fca04d8 <+152>: movq %r13, %rdi
0x10fca04db <+155>: movq %r12, %rsi
0x10fca04de <+158>: callq 0x10fdd34f2 ; symbol stub for: class_respondsToSelector
0x10fca04e3 <+163>: testb %al, %al
0x10fca04e5 <+165>: je 0x10fca0541 ; <+257>
0x10fca04e7 <+167>: movq %r15, %rdi
0x10fca04ea <+170>: movq %r12, %rsi
0x10fca04ed <+173>: movq -0x38(%rbp), %rdx
0x10fca04f1 <+177>: callq *0x2f8d21(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca04f7 <+183>: testq %rax, %rax
0x10fca04fa <+186>: je 0x10fca0541 ; <+257>
0x10fca04fc <+188>: cmpq %r15, %rax
0x10fca04ff <+191>: je 0x10fca0541 ; <+257>
0x10fca0501 <+193>: testq %rax, %rax
0x10fca0504 <+196>: movq -0x30(%rbp), %rbx
0x10fca0508 <+200>: movq -0x40(%rbp), %r15
0x10fca050c <+204>: jns 0x10fca0535 ; <+245>
0x10fca050e <+206>: movq %rax, %rcx
0x10fca0511 <+209>: shrq $0x3c, %rcx
0x10fca0515 <+213>: andl $0x7, %ecx
0x10fca0518 <+216>: cmpq $0x7, %rcx
0x10fca051c <+220>: jne 0x10fca052c ; <+236>
0x10fca051e <+222>: movq %rax, %rcx
0x10fca0521 <+225>: shrq $0x34, %rcx
0x10fca0525 <+229>: movzbl %cl, %ecx
0x10fca0528 <+232>: addq $0x8, %rcx
0x10fca052c <+236>: testw %cx, %cx
0x10fca052f <+239>: je 0x10fca06e1 ; <+673>
0x10fca0535 <+245>: movq %rax, (%r15,%rbx)
0x10fca0539 <+249>: xorl %r15d, %r15d
0x10fca053c <+252>: jmp 0x10fca0711 ; <+721>
0x10fca0541 <+257>: movq %r15, -0x30(%rbp)
0x10fca0545 <+261>: leaq 0x2d19f0(%rip), %rsi ; “_NSZombie_”
0x10fca054c <+268>: movl $0xa, %edx
0x10fca0551 <+273>: movq %rbx, %rdi
0x10fca0554 <+276>: callq 0x10fdd3b52 ; symbol stub for: strncmp
0x10fca0559 <+281>: testl %eax, %eax
0x10fca055b <+283>: je 0x10fca0723 ; <+739>
0x10fca0561 <+289>: movq 0x330998(%rip), %rbx ; “methodSignatureForSelector:”
0x10fca0568 <+296>: movq %r13, %rdi
0x10fca056b <+299>: movq %rbx, %rsi
0x10fca056e <+302>: callq 0x10fdd34f2 ; symbol stub for: class_respondsToSelector
0x10fca0573 <+307>: testb %al, %al
0x10fca0575 <+309>: movq -0x38(%rbp), %r12
0x10fca0579 <+313>: je 0x10fca0774 ; <+820>
0x10fca057f <+319>: movq -0x30(%rbp), %rdi
0x10fca0583 <+323>: movq %rbx, %rsi
0x10fca0586 <+326>: movq %r12, %rdx
0x10fca0589 <+329>: callq *0x2f8c89(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca058f <+335>: movq %rax, %r13
0x10fca0592 <+338>: testq %r13, %r13
0x10fca0595 <+341>: je 0x10fca07d8 ; <+920>
0x10fca059b <+347>: movq 0x33092e(%rip), %rsi ; “_frameDescriptor”
0x10fca05a2 <+354>: movq %r13, %rdi
0x10fca05a5 <+357>: callq *0x2f8c6d(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca05ab <+363>: movq %rax, %r15
0x10fca05ae <+366>: movq (%r15), %rax
0x10fca05b1 <+369>: movzwl 0x22(%rax), %eax
0x10fca05b5 <+373>: shrl $0x6, %eax
0x10fca05b8 <+376>: andl $0x1, %eax
0x10fca05bb <+379>: movq -0x48(%rbp), %rbx
0x10fca05bf <+383>: cmpq %rbx, %rax
0x10fca05c2 <+386>: je 0x10fca0607 ; <+455>
0x10fca05c4 <+388>: movq %r12, %rdi
0x10fca05c7 <+391>: callq 0x10fdd3ab6 ; symbol stub for: sel_getName
0x10fca05cc <+396>: movq %rax, %rdx
0x10fca05cf <+399>: movq (%r15), %rax
0x10fca05d2 <+402>: movzwl 0x22(%rax), %eax
0x10fca05d6 <+406>: leaq 0x2d4beb(%rip), %rsi ; “”
0x10fca05dd <+413>: leaq 0x2d8df2(%rip), %r8 ; " not"
0x10fca05e4 <+420>: testb $0x40, %al
0x10fca05e6 <+422>: movq %r8, %rcx
0x10fca05e9 <+425>: cmovneq %rsi, %rcx
0x10fca05ed <+429>: testq %rbx, %rbx
0x10fca05f0 <+432>: cmovneq %rsi, %r8
0x10fca05f4 <+436>: leaq 0x310355(%rip), %rsi ; @"*** NSForwarding: warning: method signature and compiler disagree on struct-return-edness of ‘%s’. Signature thinks it does%s return a struct, and compiler thinks it does%s."
0x10fca05fb <+443>: movl $0x4, %edi
0x10fca0600 <+448>: xorl %eax, %eax
0x10fca0602 <+450>: callq 0x10fce27d0 ; CFLog
0x10fca0607 <+455>: movq 0x331432(%rip), %rdi ; (void *)0x000000010ffd4760: NSInvocation
0x10fca060e <+462>: movq 0x3308fb(%rip), %rsi ; “_invocationWithMethodSignature:frame:”
0x10fca0615 <+469>: movq %r13, %rdx
0x10fca0618 <+472>: movq -0x40(%rbp), %rcx
0x10fca061c <+476>: callq *0x2f8bf6(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca0622 <+482>: movq %rax, %r14
0x10fca0625 <+485>: movq -0x30(%rbp), %rbx
0x10fca0629 <+489>: movq %rbx, %rdi
0x10fca062c <+492>: callq 0x10fdd3936 ; symbol stub for: object_getClass
0x10fca0631 <+497>: movq 0x330908(%rip), %r12 ; “forwardInvocation:”
0x10fca0638 <+504>: movq %rax, %rdi
0x10fca063b <+507>: movq %r12, %rsi
0x10fca063e <+510>: callq 0x10fdd34f2 ; symbol stub for: class_respondsToSelector
0x10fca0643 <+515>: testb %al, %al
0x10fca0645 <+517>: je 0x10fca0658 ; <+536>
0x10fca0647 <+519>: movq %rbx, %rdi
0x10fca064a <+522>: movq %r12, %rsi
0x10fca064d <+525>: movq %r14, %rdx
0x10fca0650 <+528>: callq *0x2f8bc2(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca0656 <+534>: jmp 0x10fca0679 ; <+569>
0x10fca0658 <+536>: movq %rbx, %rdi
0x10fca065b <+539>: callq 0x10fdd393c ; symbol stub for: object_getClassName
0x10fca0660 <+544>: movq %rax, %rcx
0x10fca0663 <+547>: leaq 0x310306(%rip), %rsi ; @"*** NSForwarding: warning: object %p of class ‘%s’ does not implement forwardInvocation: – dropping message"
0x10fca066a <+554>: movl $0x4, %edi
0x10fca066f <+559>: xorl %eax, %eax
0x10fca0671 <+561>: movq %rbx, %rdx
0x10fca0674 <+564>: callq 0x10fce27d0 ; CFLog
0x10fca0679 <+569>: movq 0x331d28(%rip), %rax ; NSInvocation._retainedArgs
0x10fca0680 <+576>: cmpb $0x0, (%r14,%rax)
0x10fca0685 <+581>: je 0x10fca06bc ; <+636>
0x10fca0687 <+583>: movq (%r15), %rax
0x10fca068a <+586>: cmpb $0x0, 0x22(%rax)
0x10fca068e <+590>: jns 0x10fca06bc ; <+636>
0x10fca0690 <+592>: movq 0x331d01(%rip), %rcx ; NSInvocation._frame
0x10fca0697 <+599>: movl 0x1c(%rax), %edx
0x10fca069a <+602>: movq -0x40(%rbp), %rdi
0x10fca069e <+606>: addq %rdx, %rdi
0x10fca06a1 <+609>: movzbl 0x20(%rax), %esi
0x10fca06a5 <+613>: addq (%r14,%rcx), %rdx
0x10fca06a9 <+617>: movq (%rsi,%rdi), %rdi
0x10fca06ad <+621>: movq (%rsi,%rdx), %rsi
0x10fca06b1 <+625>: movq (%rax), %rax
0x10fca06b4 <+628>: movl 0x10(%rax), %edx
0x10fca06b7 <+631>: callq 0x10fdd37fe ; symbol stub for: memmove
0x10fca06bc <+636>: movq 0x331ccd(%rip), %rax ; NSInvocation._retdata
0x10fca06c3 <+643>: movq (%r14,%rax), %r15
0x10fca06c7 <+647>: movq 0x33087a(%rip), %rsi ; “methodReturnType”
0x10fca06ce <+654>: movq %r13, %rdi
0x10fca06d1 <+657>: callq *0x2f8b41(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca06d7 <+663>: cmpb $0x44, (%rax)
0x10fca06da <+666>: jne 0x10fca0711 ; <+721>
0x10fca06dc <+668>: fldt (%r15)
0x10fca06df <+671>: jmp 0x10fca0711 ; <+721>
0x10fca06e1 <+673>: movq %rax, %r13
0x10fca06e4 <+676>: movq %r13, %rdi
0x10fca06e7 <+679>: callq 0x10fd894f0 ; getAtomTarget
0x10fca06ec <+684>: movq %rax, %r12
0x10fca06ef <+687>: movq %r12, (%r15,%rbx)
0x10fca06f3 <+691>: movl $0x400, %ecx ; imm = 0x400
0x10fca06f8 <+696>: xorl %r8d, %r8d
0x10fca06fb <+699>: movq %r14, %rdi
0x10fca06fe <+702>: movq %r15, %rsi
0x10fca0701 <+705>: movq %r15, %rdx
0x10fca0704 <+708>: callq 0x10fca1be0 ; __invoking___
0x10fca0709 <+713>: cmpq %r12, (%r15)
0x10fca070c <+716>: jne 0x10fca0711 ; <+721>
0x10fca070e <+718>: movq %r13, (%r15)
0x10fca0711 <+721>: movq %r15, %rax
0x10fca0714 <+724>: addq $0x28, %rsp
0x10fca0718 <+728>: popq %rbx
0x10fca0719 <+729>: popq %r12
0x10fca071b <+731>: popq %r13
0x10fca071d <+733>: popq %r14
0x10fca071f <+735>: popq %r15
0x10fca0721 <+737>: popq %rbp
0x10fca0722 <+738>: retq
0x10fca0723 <+739>: leaq 0x33ecb6(%rip), %rax ; __CFOASafe
0x10fca072a <+746>: cmpb $0x0, (%rax)
0x10fca072d <+749>: je 0x10fca0744 ; <+772>
0x10fca072f <+751>: movl $0x15, %edi
0x10fca0734 <+756>: xorl %edx, %edx
0x10fca0736 <+758>: xorl %ecx, %ecx
0x10fca0738 <+760>: xorl %r8d, %r8d
0x10fca073b <+763>: movq -0x30(%rbp), %rsi
0x10fca073f <+767>: callq 0x10fd53d20 ; __CFRecordAllocationEvent
0x10fca0744 <+772>: addq $0xa, %rbx
0x10fca0748 <+776>: movq -0x38(%rbp), %rdi
0x10fca074c <+780>: callq 0x10fdd3ab6 ; symbol stub for: sel_getName
0x10fca0751 <+785>: movq %rax, %rcx
0x10fca0754 <+788>: leaq 0x310155(%rip), %rsi ; @"*** -[%s %s]: message sent to deallocated instance %p"
0x10fca075b <+795>: movl $0x3, %edi
0x10fca0760 <+800>: xorl %eax, %eax
0x10fca0762 <+802>: movq %rbx, %rdx
0x10fca0765 <+805>: movq -0x30(%rbp), %r8
0x10fca0769 <+809>: callq 0x10fce27d0 ; CFLog
0x10fca076e <+814>: int3
-> 0x10fca076f <+815>: jmp 0x10fca0869 ; <+1065>
0x10fca0774 <+820>: movq %r13, %rdi
0x10fca0777 <+823>: callq 0x10fdd34e6 ; symbol stub for: class_getSuperclass
0x10fca077c <+828>: movq %rax, %rbx
0x10fca077f <+831>: movq -0x30(%rbp), %rdi
0x10fca0783 <+835>: callq 0x10fdd393c ; symbol stub for: object_getClassName
0x10fca0788 <+840>: movq %rax, %r15
0x10fca078b <+843>: testq %rbx, %rbx
0x10fca078e <+846>: jne 0x10fca07ba ; <+890>
0x10fca0790 <+848>: movq -0x30(%rbp), %rbx
0x10fca0794 <+852>: movq %rbx, %rdi
0x10fca0797 <+855>: callq 0x10fdd393c ; symbol stub for: object_getClassName
0x10fca079c <+860>: movq %rax, %r8
0x10fca079f <+863>: leaq 0x31012a(%rip), %rsi ; @"*** NSForwarding: warning: object %p of class ‘%s’ does not implement methodSignatureForSelector: – did you forget to declare the superclass of ‘%s’?"
0x10fca07a6 <+870>: movl $0x4, %edi
0x10fca07ab <+875>: xorl %eax, %eax
0x10fca07ad <+877>: movq %rbx, %rdx
0x10fca07b0 <+880>: movq %r15, %rcx
0x10fca07b3 <+883>: callq 0x10fce27d0 ; CFLog
0x10fca07b8 <+888>: jmp 0x10fca07d4 ; <+916>
0x10fca07ba <+890>: leaq 0x31012f(%rip), %rsi ; @"*** NSForwarding: warning: object %p of class ‘%s’ does not implement methodSignatureForSelector: – trouble ahead"
0x10fca07c1 <+897>: movl $0x4, %edi
0x10fca07c6 <+902>: xorl %eax, %eax
0x10fca07c8 <+904>: movq -0x30(%rbp), %rdx
0x10fca07cc <+908>: movq %r15, %rcx
0x10fca07cf <+911>: callq 0x10fce27d0 ; CFLog
0x10fca07d4 <+916>: movq -0x38(%rbp), %r12
0x10fca07d8 <+920>: movq %r12, %rdi
0x10fca07db <+923>: callq 0x10fdd3ab6 ; symbol stub for: sel_getName
0x10fca07e0 <+928>: movq %rax, %r15
0x10fca07e3 <+931>: movq %r15, %rdi
0x10fca07e6 <+934>: callq 0x10fdd3abc ; symbol stub for: sel_getUid
0x10fca07eb <+939>: movq %rax, %rbx
0x10fca07ee <+942>: cmpq %r12, %rbx
0x10fca07f1 <+945>: je 0x10fca0810 ; <+976>
0x10fca07f3 <+947>: leaq 0x310116(%rip), %rsi ; @"*** NSForwarding: warning: selector (%p) for message ‘%s’ does not match selector known to Objective C runtime (%p)-- abort"
0x10fca07fa <+954>: movl $0x4, %edi
0x10fca07ff <+959>: xorl %eax, %eax
0x10fca0801 <+961>: movq -0x38(%rbp), %rdx
0x10fca0805 <+965>: movq %r15, %rcx
0x10fca0808 <+968>: movq %rbx, %r8
0x10fca080b <+971>: callq 0x10fce27d0 ; CFLog
0x10fca0810 <+976>: movq -0x30(%rbp), %rdi
0x10fca0814 <+980>: callq 0x10fdd3936 ; symbol stub for: object_getClass
0x10fca0819 <+985>: movq 0x330208(%rip), %rbx ; “doesNotRecognizeSelector:”
0x10fca0820 <+992>: movq %rax, %rdi
0x10fca0823 <+995>: movq %rbx, %rsi
0x10fca0826 <+998>: callq 0x10fdd34f2 ; symbol stub for: class_respondsToSelector
0x10fca082b <+1003>: testb %al, %al
0x10fca082d <+1005>: je 0x10fca0843 ; <+1027>
0x10fca082f <+1007>: movq -0x30(%rbp), %rdi
0x10fca0833 <+1011>: movq %rbx, %rsi
0x10fca0836 <+1014>: movq -0x38(%rbp), %rdx
0x10fca083a <+1018>: callq *0x2f89d8(%rip) ; (void *)0x000000010e5bbac0: objc_msgSend
0x10fca0840 <+1024>: int3
0x10fca0841 <+1025>: jmp 0x10fca0869 ; <+1065>
0x10fca0843 <+1027>: movq -0x30(%rbp), %rbx
0x10fca0847 <+1031>: movq %rbx, %rdi
0x10fca084a <+1034>: callq 0x10fdd393c ; symbol stub for: object_getClassName
0x10fca084f <+1039>: movq %rax, %rcx
0x10fca0852 <+1042>: leaq 0x3100d7(%rip), %rsi ; @"*** NSForwarding: warning: object %p of class ‘%s’ does not implement doesNotRecognizeSelector: – abort"
0x10fca0859 <+1049>: movl $0x4, %edi
0x10fca085e <+1054>: xorl %eax, %eax
0x10fca0860 <+1056>: movq %rbx, %rdx
0x10fca0863 <+1059>: callq 0x10fce27d0 ; CFLog
0x10fca0868 <+1064>: int3
0x10fca0869 <+1065>: callq 0x10fdd36d2 ; symbol stub for: getpid
0x10fca086e <+1070>: movl $0x9, %esi
0x10fca0873 <+1075>: movl %eax, %edi
0x10fca0875 <+1077>: callq 0x10fdd3738 ; symbol stub for: kill
0x10fca087a <+1082>: nopw (%rax,%rax)