Record Case Detail

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100 int
0 append L619asTm -36876
/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
=================================================================
==170==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x000000515898 bp 0x7ffdc9c2c490 sp 0x7ffdc9c2c440 T0)
==170==The signal is caused by a READ memory access.
==170==Hint: address points to the zero page.
    #0 0x515897  (/out/package/main+0x515897)
    #1 0x515367  (/out/package/main+0x515367)
    #2 0x7fb6da951b96  (/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) 
==170==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.

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false
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false
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L619asTm=-36876
fwnAoN4Ig=44998
YJQFrK0fwNHXZRq=-11440
FLAiuYpE=65359
daYCu5c7DW2b=-11006
MVudPk0Af8G6=11531
pYaxK=43758
uSMGF=-34549
TJeQDRb20=34186
vMxC9w4hy=36845
Uw1jOTPqNRd=-49806
Qg9m7PU=41544
NVTK7tHMUker0R1=-7523
FGloLg=64519
s1LAxDE=-33213
BfZ6d7O=42186
H59j40=-63184
IQA9fnzk=-52162
01gT4WDyc2X=-31631
D1MzHv=18871
9QlmKBbknqzepW=-10402
35RruwcQCVMxLsN=25160
FY5fnxd=207
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L619asTm=-36876
fwnAoN4Ig=44998
YJQFrK0fwNHXZRq=-11440
FLAiuYpE=65359
daYCu5c7DW2b=-11006
MVudPk0Af8G6=11531
pYaxK=43758
uSMGF=-34549
TJeQDRb20=34186
vMxC9w4hy=36845
Uw1jOTPqNRd=-49806
Qg9m7PU=41544
NVTK7tHMUker0R1=-7523
FGloLg=64519
s1LAxDE=-33213
BfZ6d7O=42186
H59j40=-63184
IQA9fnzk=-52162
01gT4WDyc2X=-31631
D1MzHv=18871
9QlmKBbknqzepW=-10402
35RruwcQCVMxLsN=25160
FY5fnxd=207
5ZfKXW3AGFImB=211
D8qdWc4ZGYA=54435
F6CW0KkA5Rc=-61567
FLAiuYpE=65359
FGloLg=64519
D8qdWc4ZGYA=54435
fwnAoN4Ig=44998
pYaxK=43758
BfZ6d7O=42186
Qg9m7PU=41544
vMxC9w4hy=368

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