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Interrupt Trap: 6 in Program C

I have a C program. It compiles successfully and works fine, but in the end main()it crashes and gives me an error Abort trap: 6.

I have no idea how I can debug this. A few error related SO questions Abort trap: 6did not help me.

In general, what could be the problem?

(I do not want to publish my source code, since it contains about 400 lines of code. I would publish a specific piece of code if I knew what to look for.)

Note. I run the program in the terminal using GCC. But when I run it in Xcode, my program will work, and if I stop it, it ends with exit code: 9.

This is the result of lldb:

Process 1191 stopped
* thread #1: tid = 0xa759, 0x00007fff8fa08286 libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00007fff8fa08286 libsystem_kernel.dylib`__pthread_kill + 10
libsystem_kernel.dylib`__pthread_kill + 10:
-> 0x7fff8fa08286:  jae    0x7fff8fa08290            ; __pthread_kill + 20
   0x7fff8fa08288:  movq   %rax, %rdi
   0x7fff8fa0828b:  jmp    0x7fff8fa03c53            ; cerror_nocancel
   0x7fff8fa08290:  retq
+4
1

, ! , , , .

( i, j ..).

Exit code 9 , . .

+2

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