Record Case Detail

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 pwd: /out/package
ppid: 31902
   1: WRITELN sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6 | sleep 0.6
   2: WRITELN echo success
   3: WRITELN exit
exit: 1

Your answer may be identical to the JOJ answer in the first several lines.

However, the main problem you meet now is Runtime Error. And the exit code of your program is 1, which should be 0.

Please double check your code to solve this problem and try again.

mumsh $ =================================================================
==31903==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60c0000000b8 at pc 0x000000515291 bp 0x7ffc58d79400 sp 0x7ffc58d793f8
WRITE of size 1 at 0x60c0000000b8 thread T0
    #0 0x515290  (/out/package/mumsh_memory_check+0x515290)
    #1 0x51583a  (/out/package/mumsh_memory_check+0x51583a)
    #2 0x517587  (/out/package/mumsh_memory_check+0x517587)
    #3 0x517698  (/out/package/mumsh_memory_check+0x517698)
    #4 0x7f5cb6ae7b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #5 0x41cbc9  (/out/package/mumsh_memory_check+0x41cbc9)

0x60c0000000b8 is located 0 bytes to the right of 120-byte region [0x60c000000040,0x60c0000000b8)
allocated by thread T0 here:
    #0 0x4dca80  (/out/package/mumsh_memory_check+0x4dca80)
    #1 0x7f5cb6b45b8b  (/lib/x86_64-linux-gnu/libc.so.6+0x7fb8b)
    #2 0x7f5cb6b52f50  (/lib/x86_64-linux-gnu/libc.so.6+0x8cf50)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/out/package/mumsh_memory_check+0x5

mumsh $ mumsh $ success
mumsh $ exit

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JOJ Answer