Record Case Detail

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 pwd: /out/package
ppid: 36478
   1: WRITELN echo exit | ./mumsh
   2: WRITELN exit

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

However, you will still get Wrong Answer because the complete output may be longer and there might be errors in the future lines.

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

mumsh $ =================================================================
==36479==ERROR: AddressSanitizer: heap-use-after-free on address 0x619000000580 at pc 0x0000004b2b77 bp 0x7ffd48300e70 sp 0x7ffd48300620
READ of size 1 at 0x619000000580 thread T0
    #0 0x4b2b76  (/out/package/mumsh_memory_check+0x4b2b76)
    #1 0x51c6e4  (/out/package/mumsh_memory_check+0x51c6e4)
    #2 0x51ce4d  (/out/package/mumsh_memory_check+0x51ce4d)
    #3 0x7f436c0b3b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #4 0x41d289  (/out/package/mumsh_memory_check+0x41d289)

0x619000000580 is located 0 bytes inside of 1024-byte region [0x619000000580,0x619000000980)
freed by thread T0 here:
    #0 0x4dcf70  (/out/package/mumsh_memory_check+0x4dcf70)
    #1 0x51c68c  (/out/package/mumsh_memory_check+0x51c68c)
    #2 0x51ce4d  (/out/package/mumsh_memory_check+0x51ce4d)
    #3 0x7f436c0b3b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

previously allocated by thread T0 here:
    #0 0x4dd368  (/out/package/mumsh_memory_check+0x4dd368)

mumsh $ mumsh $ exit
mumsh $ exit

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JOJ Answer