Thread 2 exc_bad_access code 1 address 0x0 July 8, 2019 16 32 64 128 Thread 1 exc_bad_access (code=1 address=0x4) Thread 2 exc_bad_access (code=1 address=0x8) Thread 2 exc_bad_access (code=1 address=0x10) Thread 2 exc_bad_access (code=1 address=0x0) Thread 2 exc_bad_access (code=1 address=0x30)