pwd: /out/package
ppid: 53
   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

=================================================================
==54==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 19456 byte(s) in 19 object(s) allocated from:
    #0 0x4dd210  (/out/package/mumsh_memory_check+0x4dd210)
    #1 0x5165f8  (/out/package/mumsh_memory_check+0x5165f8)
    #2 0x7f7733e86b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: 19456 byte(s) leaked in 19 allocation(s).

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