Record Case Detail

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 pwd: /out/package
ppid: 423
   1: WRITELN cd non-existing
   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 $ wrong parameter for cd.
mumsh $ exit

=================================================================
==424==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 1024 byte(s) in 1 object(s) allocated from:
    #0 0x4dd030  (/out/package/mumsh+0x4dd030)
    #1 0x517d5e  (/out/package/mumsh+0x517d5e)
    #2 0x515ce6  (/out/package/mumsh+0x515ce6)
    #3 0x7f25fdcd7b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 1024 byte(s) in 1 object(s) allocated from:
    #0 0x4dd030  (/out/package/mumsh+0x4dd030)
    #1 0x5169cd  (/out/package/mumsh+0x5169cd)
    #2 0x515ce6  (/out/package/mumsh+0x515ce6)
    #3 0x7f25fdcd7b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: 2048 byte(s) leaked in 2 allocation(s).

mumsh $ non-existing: No such file or directory
mumsh $ exit

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JOJ Answer