double free problem

[Nezar]

Hi,
When i try to free a block of memory (using free()) i had previously allocated for a linked list consisting of only one struct, pointing to itself, using malloc(), i get the following error:

*** Error in `./speller': double free or corruption (fasttop): 0x0970f5f8 ***
======= Backtrace: =========
/lib/libc.so.6[0x4174ccf2]
./speller[0x80495d6]
./speller[0x8048cd5]
/lib/libc.so.6(__libc_start_main+0xf3)[0x416f0963]
======= Memory map: ========
08048000-0804a000 r-xp 00000000 fd:01 145201     /home/jharvard/cppcode/pset6/speller
0804a000-0804b000 r--p 00001000 fd:01 145201     /home/jharvard/cppcode/pset6/speller
0804b000-0804c000 rw-p 00002000 fd:01 145201     /home/jharvard/cppcode/pset6/speller
08b62000-0971d000 rw-p 00000000 00:00 0          [heap]
416b4000-416d3000 r-xp 00000000 fd:01 401476     /usr/lib/ld-2.17.so
416d3000-416d4000 r--p 0001e000 fd:01 401476     /usr/lib/ld-2.17.so
416d4000-416d5000 rw-p 0001f000 fd:01 401476     /usr/lib/ld-2.17.so
416d7000-4188f000 r-xp 00000000 fd:01 402602     /usr/lib/libc-2.17.so
4188f000-41890000 ---p 001b8000 fd:01 402602     /usr/lib/libc-2.17.so
41890000-41892000 r--p 001b8000 fd:01 402602     /usr/lib/libc-2.17.so
41892000-41893000 rw-p 001ba000 fd:01 402602     /usr/lib/libc-2.17.so
41893000-41896000 rw-p 00000000 00:00 0 
4198e000-419a9000 r-xp 00000000 fd:01 402621     /usr/lib/libgcc_s-4.8.1-20130603.so.1
419a9000-419aa000 r--p 0001a000 fd:01 402621     /usr/lib/libgcc_s-4.8.1-20130603.so.1
419aa000-419ab000 rw-p 0001b000 fd:01 402621     /usr/lib/libgcc_s-4.8.1-20130603.so.1
b775c000-b775d000 rw-p 00000000 00:00 0 
b776c000-b7770000 rw-p 00000000 00:00 0 
b7770000-b7771000 r-xp 00000000 00:00 0          [vdso]
bfed5000-bfef6000 rw-p 00000000 00:00 0          [stack]
Aborted (core dumped) 

I'd appreciate any guidance to solve this problem.

[MikeyBoy]

How can we possibly help you find the error in your code, if we can't see your code?

Or did you mean to post this in the Telepath Forum instead?

[Codermik]

lol Mikeyboy, made me chuckle :D