pwd: /out/package
ppid: 13667
   1: WRITELN echo abc > 1.txt > 2.txt
   2: WRITELN echo abc > 1.txt >> 2.txt
   3: WRITELN echo abc > 1.txt | grep abc
   4: WRITELN exit

mumsh $ error: duplicated output redirection
mumsh $ error: duplicated output redirection
mumsh $ error: duplicated output redirection
mumsh $ exit

=================================================================
==13668==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32768 byte(s) in 2 object(s) allocated from:
    #0 0x4dce50  (/out/package/mumsh_memory_check+0x4dce50)
    #1 0x516050  (/out/package/mumsh_memory_check+0x516050)
    #2 0x51a2d3  (/out/package/mumsh_memory_check+0x51a2d3)
    #3 0x522b26  (/out/package/mumsh_memory_check+0x522b26)
    #4 0x7f5bab62fb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 16384 byte(s) in 2 object(s) allocated from:
    #0 0x4dce50  (/out/package/mumsh_memory_check+0x4dce50)
    #1 0x516a1c  (/out/package/mumsh_memory_check+0x516a1c)
    #2 0x51a2d3  (/out/package/mumsh_memory_check+0x51a2d3)
    #3 0x522b26  (/out/package/mumsh_memory_check+0x522b26)
    #4 0x7f5bab62fb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanit

mumsh $ error: duplicated output redirection
mumsh $ error: duplicated output redirection
mumsh $ error: duplicated output redirection
mumsh $ exit