Crash program in qemu mode. Help debug

[YuriiCrimson]

i get error: -]
Oops, the program crashed with one of the test cases provided. There are
several possible explanations:

- The test case causes known crashes under normal working conditions. If
  so, please remove it. The fuzzer should be seeded with interesting
  inputs - but not ones that cause an outright crash.

- In QEMU persistent mode the selected address(es) for the loop are not
  properly cleaning up variables and memory. Try adding
  AFL_QEMU_PERSISTENT_GPR=1 or select better addresses in the binary.

- Least likely, there is a horrible bug in the fuzzer. If other options
  fail, poke <afl-users@googlegroups.com> for troubleshooting tips.

[!] WARNING: Test case 'id:000000,time:0,execs:0,orig:1.txt' results in a crash, skipping
[+] All test cases processed.

[-] PROGRAM ABORT : We need at least one valid input seed that does not crash!
Location : main(), src/afl-fuzz.c:2177

I use qemu mode with persistense. What is the best way to debug a target in a fuzzer?