Record Case Detail

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50 str
0 empty
1 empty
2 empty
3 append TrlyPnG HYg
/in/dlist.c:125:14: runtime error: member access within null pointer of type 'node_t' (aka 'struct _node_')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /in/dlist.c:125:14 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==114==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x000000516b1f bp 0x7fff54d8e7b0 sp 0x7fff54d8e6c0 T0)
==114==The signal is caused by a WRITE memory access.
==114==Hint: address points to the zero page.
    #0 0x516b1e  (/out/package/main+0x516b1e)
    #1 0x519965  (/out/package/main+0x519965)
    #2 0x5152d7  (/out/package/main+0x5152d7)
    #3 0x7f6df8df6b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #4 0x41ca79  (/out/package/main+0x41ca79)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/out/package/main+0x516b1e) 
==114==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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true
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false
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TrlyPnG=HYg
zjGWmsfKQB1Tb7y=VgY
N01jz6vTpnB=YGo
oK4e2LCvji5sGrp=l3CJj
3zOdM=oYrc
DdI8RLmxv=O12f
J3Nr4C=Beg
mnQaKP=lBVH5
RS0mE=h9S
J3Nr4C=Beg
TrlyPnG=HYg
DdI8RLmxv=O12f
zjGWmsfKQB1Tb7y=VgY
N01jz6vTpnB=YGo
RS0mE=h9S
oK4e2LCvji5sGrp=l3CJj
mnQaKP=lBVH5
3zOdM=oYrc
14
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TrlyPnG=HYg
zjGWmsfKQB1Tb7y=VgY
N01jz6vTpnB=YGo
oK4e2LCvji5sGrp=l3CJj
3zOdM=oYrc
DdI8RLmxv=O12f
J3Nr4C=Beg
mnQaKP=lBVH5
RS0mE=h9S
gzdVxy=jrmsc
t4cjzXwDgSM=gXuVF
EpGSej9Nmrzs7Y=3Zp5y
8fsq2Uhlpv7=jTHxw
J3Nr4C=Beg
TrlyPnG=HYg
DdI8RLmxv=O12f
zjGWmsfKQB1Tb7y=VgY
N01jz6vTpnB=YGo
RS0mE=h9S
oK4e2LCvji5sGrp=l3CJj
mnQaKP=lBVH5
3zOdM=oYrc
19
20
21
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TrlyPnG=HYg
zjGWmsfKQB1Tb7y=VgY
N01jz6vTpnB=YGo
oK4e2LCvji5sGrp=l3CJj
3zOdM=oYrc
DdI8RLmxv=O12f
J3Nr4C=Beg
mnQaKP=lBVH5
RS0mE=h9S
gzdVxy=jrmsc
t4cjzXwDgSM=gXuVF
EpGSej9Nmrzs7Y=3Zp5y
8fsq2Uhlpv7=jTHxw
oXUPi2yIr0DH4=b8kqO
8woXjJNY3zTxnk=35i1
1B0cSTgs=TUyt0
0VNOhm2e=HzQB
3zOdM=oYrc
mnQaKP=lBVH5
oK4e2LCvji5sGrp=l3CJj
gzdVxy=jrmsc
8fsq2Uhlpv7=jTHxw
RS0mE

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JOJ Answer