corrupted double-linked

[Ian Lance Taylor]

On Wed, Sep 26, 2012 at 6:14 PM, GHui <ugiwgh@gmail.com> wrote:
> I had coding a program like the following.
> #include <stdio.h>
> int main(int argc,char **argv)
> {
>     int *a=(int*)malloc(sizeof(int));
>     free(a);
>     free(a);
>     return 0;
> }
> The program will get error "double free or corruption (fasttop)".

On some systems, with some libraries, yes.

> I have another question. I have got an error message "corrupted double-linked". What code can result in this? And its killed signal.

http://en.wikipedia.org/wiki/Memory_corruption

Ian