Record Case Detail

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 pwd: /out/package
ppid: 4447
   1: WRITELN echo "de'f' ghi" '123"a"bc' a b c
   2: 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 $ >>=================================================================
==4448==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x619000000480 at pc 0x000000517d54 bp 0x7ffce7d79670 sp 0x7ffce7d79668
WRITE of size 1 at 0x619000000480 thread T0
    #0 0x517d53  (/out/package/mumsh_memory_check+0x517d53)
    #1 0x518e20  (/out/package/mumsh_memory_check+0x518e20)
    #2 0x519780  (/out/package/mumsh_memory_check+0x519780)
    #3 0x7feab9622b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #4 0x41d019  (/out/package/mumsh_memory_check+0x41d019)

0x619000000480 is located 0 bytes to the right of 1024-byte region [0x619000000080,0x619000000480)
allocated by thread T0 here:
    #0 0x4dced0  (/out/package/mumsh_memory_check+0x4dced0)
    #1 0x518d9d  (/out/package/mumsh_memory_check+0x518d9d)
    #2 0x519780  (/out/package/mumsh_memory_check+0x519780)
    #3 0x7feab9622b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/out/package/mumsh_memory_check+0x517d

mumsh $ de'f' ghi 123"a"bc a b c
mumsh $ exit

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JOJ Answer