whit=10 t=12.8 tid=1
  #0 pc=0x18360119c rva=0x0 fn=_xzm_free
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  #2 pc=0x135518af4 rva=0x22f4af4 fn=___lldb_unnamed_symbol147157
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  #4 pc=0x133257d60 rva=0x33d60 fn=___lldb_unnamed_symbol2829
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  #7 pc=0x13329143c rva=0x6d43c fn=___lldb_unnamed_symbol3872
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  #13 pc=0x1838b9d50 rva=0x0 fn=__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
  #14 pc=0x1838b9a48 rva=0x0 fn=__CFRunLoopDoTimer
  #15 pc=0x1838b95c0 rva=0x0 fn=__CFRunLoopDoTimers
