Record Case Detail

This function is in beta test. Please help improve it in the issues here.

 pwd: /out/package
ppid: 99654
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo 321 > 2.txt
   3: WRITELN echo abc < 1.txt < 2.txt
   4: WRITELN echo abc | grep abc < 1.txt
   5: 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 $ =================================================================
==99655==ERROR: AddressSanitizer: heap-use-after-free on address 0x619000000080 at pc 0x0000004999cc bp 0x7fff3932c670 sp 0x7fff3932be20
READ of size 2 at 0x619000000080 thread T0
    #0 0x4999cb  (/out/package/mumsh_memory_check+0x4999cb)
    #1 0x517074  (/out/package/mumsh_memory_check+0x517074)
    #2 0x7fafd3ae5b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41cf29  (/out/package/mumsh_memory_check+0x41cf29)

0x619000000080 is located 0 bytes inside of 1030-byte region [0x619000000080,0x619000000486)
freed by thread T0 here:
    #0 0x4dcc10  (/out/package/mumsh_memory_check+0x4dcc10)
    #1 0x517030  (/out/package/mumsh_memory_check+0x517030)
    #2 0x7fafd3ae5b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

previously allocated by thread T0 here:
    #0 0x4dcde0  (/out/package/mumsh_memory_check+0x4dcde0)
    #1 0x51570c  (/out/package/mumsh_memory_check+0x51570c)
    #2 0x7fafd3ae5b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21

mumsh $ mumsh $ mumsh $ error: duplicated input redirection
mumsh $ error: duplicated input redirection
mumsh $ exit

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JOJ Answer