Record Case Detail

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5 int
0 append 4AP0LIhQU 2
/in/dlist.c:25:15: runtime error: member access within null pointer of type 'node_t' (aka 'struct node')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /in/dlist.c:25:15 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==99==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x000000515898 bp 0x7ffec0181790 sp 0x7ffec0181740 T0)
==99==The signal is caused by a READ memory access.
==99==Hint: address points to the zero page.
    #0 0x515897  (/out/package/main+0x515897)
    #1 0x515367  (/out/package/main+0x515367)
    #2 0x7f15b716bb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41cb09  (/out/package/main+0x41cb09)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/out/package/main+0x515897) 
==99==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
1
2
4AP0LIhQU=2
oBUmdxEaIHuyL8=759
3
4
4AP0LIhQU=2
oBUmdxEaIHuyL8=759
MiXRrfQ0KLG=-420

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