pwd: /out/package
ppid: 21445
   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

=================================================================
==21446==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2400 byte(s) in 3 object(s) allocated from:
    #0 0x4dce00  (/out/package/mumsh_memory_check+0x4dce00)
    #1 0x515ab5  (/out/package/mumsh_memory_check+0x515ab5)
    #2 0x7f5e116dcb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 160 byte(s) in 2 object(s) allocated from:
    #0 0x4dce00  (/out/package/mumsh_memory_check+0x4dce00)
    #1 0x515a5a  (/out/package/mumsh_memory_check+0x515a5a)
    #2 0x7f5e116dcb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: 2560 byte(s) leaked in 5 allocation(s).

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