Stack Trace from foreach crash

Process 10019 stopped
* thread #1: tid = 0x41048, 0x00007fff881e3282 libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00007fff881e3282 libsystem_kernel.dylib`__pthread_kill + 10
libsystem_kernel.dylib`__pthread_kill + 10:
-> 0x7fff881e3282:  jae    0x7fff881e328c            ; __pthread_kill + 20
   0x7fff881e3284:  movq   %rax, %rdi
   0x7fff881e3287:  jmp    0x7fff881deca3            ; cerror_nocancel
   0x7fff881e328c:  retq   
(lldb) bt
* thread #1: tid = 0x41048, 0x00007fff881e3282 libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
  * frame #0: 0x00007fff881e3282 libsystem_kernel.dylib`__pthread_kill + 10
    frame #1: 0x00007fff8e3304c3 libsystem_pthread.dylib`pthread_kill + 90
    frame #2: 0x00007fff8bd1bb73 libsystem_c.dylib`abort + 129
    frame #3: 0x00000001000dc2ec irmsde`Tcl_PanicVA + 437
    frame #4: 0x00000001000dc380 irmsde`Tcl_Panic + 148
    frame #5: 0x00000001000f43ee irmsde`Ptr2Block + 51
    frame #6: 0x00000001000f433f irmsde`TclpFree + 48
    frame #7: 0x000000010008e8c2 irmsde`FreeDictInternalRep + 118
    frame #8: 0x00000001000cfdb1 irmsde`SetListFromAny + 503
    frame #9: 0x00000001000d01da irmsde`Tcl_ListObjGetElements + 53
    frame #10: 0x00000001033feee7 tcl_cWhLvH`SimNode_nodeeval(interp=0x0000000100832610, p=0x000000010ad5b610, body=0x00000001073f3850, writeback=0) + 135 at cstruct_simnode.c:1201
    frame #11: 0x00000001034097cb tcl_cWhLvH`SimNode_method_foreach(simulator=0x000000010343ac08, interp=0x0000000100832610, objc=2, objv=0x0000000110966aa0) + 219 at cstruct_simnode.c:3303
    frame #12: 0x000000010002ae62 irmsde`TclNRRunCallbacks + 80
    frame #13: 0x00000001036598bc libtk8.6.dylib`Ttk_InvokeEnsemble + 187
    frame #14: 0x00000001036606b7 libtk8.6.dylib`WidgetInstanceObjCmd + 80
    frame #15: 0x000000010002ae62 irmsde`TclNRRunCallbacks + 80
    frame #16: 0x0000000103660f27 libtk8.6.dylib`TtkWidgetInstateCommand + 151
    frame #17: 0x00000001036598bc libtk8.6.dylib`Ttk_InvokeEnsemble + 187
    frame #18: 0x00000001036606b7 libtk8.6.dylib`WidgetInstanceObjCmd + 80
    frame #19: 0x000000010002ae62 irmsde`TclNRRunCallbacks + 80
    frame #20: 0x0000000103660f27 libtk8.6.dylib`TtkWidgetInstateCommand + 151
    frame #21: 0x00000001036598bc libtk8.6.dylib`Ttk_InvokeEnsemble + 187
    frame #22: 0x00000001036606b7 libtk8.6.dylib`WidgetInstanceObjCmd + 80
    frame #23: 0x000000010002ae62 irmsde`TclNRRunCallbacks + 80
    frame #24: 0x000000010002c0bd irmsde`TclEvalEx + 1953
    frame #25: 0x000000010002b916 irmsde`Tcl_EvalEx + 26
    frame #26: 0x00000001035b78d6 libtk8.6.dylib`Tk_BindEvent + 3870
    frame #27: 0x00000001035bcf7b libtk8.6.dylib`TkBindEventProc + 347
    frame #28: 0x00000001035c4bf0 libtk8.6.dylib`Tk_HandleEvent + 1542
    frame #29: 0x00000001035c5124 libtk8.6.dylib`WindowEventProc + 96
    frame #30: 0x00000001000d8951 irmsde`Tcl_ServiceEvent + 140
    frame #31: 0x00000001000d8b42 irmsde`Tcl_DoOneEvent + 140
    frame #32: 0x000000010009f49a irmsde`Tcl_VwaitObjCmd + 117
    frame #33: 0x000000010002ae62 irmsde`TclNRRunCallbacks + 80
    frame #34: 0x000000010002c0bd irmsde`TclEvalEx + 1953
    frame #35: 0x00000001000cd41d irmsde`Tcl_FSEvalFileEx + 465
    frame #36: 0x00000001000d37cb irmsde`Tcl_MainEx + 902
    frame #37: 0x0000000100019b5e irmsde`main(argc=2, argv=0x00007fff5fbffa90) + 110 at tclsh_main.c:19
    frame #38: 0x00007fff8d6765c9 libdyld.dylib`start + 1