pwd: /out/package
ppid: 3540
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo 321 > 2.txt
   3: WRITELN cat < 1.txt | cat >> 2.txt
   4: WRITELN cat 1.txt
   5: WRITELN cat 2.txt
   6: WRITELN ls
   7: WRITELN exit

mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 321
123
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

=================================================================
==3541==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 816 byte(s) in 1 object(s) allocated from:
    #0 0x4dcc50  (/out/package/mumsh_memory_check+0x4dcc50)
    #1 0x515498  (/out/package/mumsh_memory_check+0x515498)
    #2 0x7fad0bd2eb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: 816 byte(s) leaked in 1 allocation(s).

mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 321
123
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit