Record Case Detail

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

5 str
0 append xUfGb TeNdP
1 append FeSx0YRVlP2 Ms7o
/in/dlist.c:261:14: runtime error: member access within null pointer of type 'node_t' (aka 'struct linked_node')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /in/dlist.c:261:14 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==14==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x0000005169d2 bp 0x7fff62cf8e10 sp 0x7fff62cf8dc0 T0)
==14==The signal is caused by a WRITE memory access.
==14==Hint: address points to the zero page.
    #0 0x5169d1  (/out/package/main+0x5169d1)
    #1 0x515327  (/out/package/main+0x515327)
    #2 0x7f15e1fa2b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41cac9  (/out/package/main+0x41cac9)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/out/package/main+0x5169d1) 
==14==ABORTING

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.

0
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xUfGb=TeNdP
FeSx0YRVlP2=Ms7o
UZ3Fp1kzIbl7Xe=w5QFz
hITyrvAcZ=W14N

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JOJ Answer