Record Case Detail

Notes

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

Stderr

=================================================================
==29117==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x7ffecd600700 in thread T0
    #0 0x7f141af039c8 in operator delete(void*, unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe19c8)
    #1 0x564aa48ab258 in Dlist<int>::removeFront() (/out/package/dlist_mem+0x1a258)
    #2 0x564aa48a7858 in case4() (/out/package/dlist_mem+0x16858)
    #3 0x564aa48a5821 in main (/out/package/dlist_mem+0x14821)
    #4 0x7f1419790b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #5 0x564aa48a5dc9 in _start (/out/package/dlist_mem+0x14dc9)

Address 0x7ffecd600700 is located in stack of thread T0 at offset 208 in frame
    #0 0x564aa48a767f in case4() (/out/package/dlist_mem+0x1667f)

  This frame has 2 object(s):
    [32, 48) 'list1'
    [96, 112) 'list2' <== Memory access at offset 208 overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism 

Hints

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.

Your Answer


        

JOJ Answer

Test success.