I wrote a simple. C and makefile, installed through HomeBrew gdb, version is GNU gdb (GDB) 8.1, after the break point to run the error, the error is as follows: please tell me what is the reason, thank you!

localhost:skx_learn shikaixun$ gdb sort
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Reading symbols from sort.done.
(gdb) b 4
Breakpoint 1 at 0x100000dc5: file main.c, line 4.
(gdb) r
Starting program: / Users/shikaixun/skx_learn/sort
[New Thread 0x1803 of process 674]
[New Thread 0x2803 of process 674]
During startup program terminated with signal SIGTRAP, Trace/breakpoint trap.