Record Case Detail

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

 pwd: /out/package
ppid: 3574
   1: WRITELN > abc | | grep 123
   2: WRITELN exit
exit: 1

Your answer may be identical to the JOJ answer in the first several lines.

However, the main problem you meet now is Runtime Error. And the exit code of your program is 1, which should be 0.

Please double check your code to solve this problem and try again.

mumsh $ main.c:220:20: runtime error: null pointer passed as argument 1, which is declared to never be null
/usr/include/string.h:137:33: note: nonnull attribute specified here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior main.c:220:20 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3575==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000004b218b bp 0x7fff15a4ec70 sp 0x7fff15a4e3e0 T0)
==3575==The signal is caused by a READ memory access.
==3575==Hint: address points to the zero page.
    #0 0x4b218a  (/out/package/mumsh_memory_check+0x4b218a)
    #1 0x516656  (/out/package/mumsh_memory_check+0x516656)
    #2 0x7ff19c26ab96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41ccb9  (/out/package/mumsh_memory_check+0x41ccb9)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/out/package/mumsh_memory_check+0x4b218a) 
==3575==ABORTING

mumsh $ error: missing program
mumsh $ exit

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JOJ Answer