Re: delete causes crash with a character array

[Ulrich Eckhardt]

Alex Vinokur wrote:
> GNU g++ 3.3.3, Cygwin
[...]
> static char* mbuffer = NULL;
> void doit()
> {
>   // Stuff
>   mbuffer = new (nothrow) char [1001];
>   assert (mbuffer != NULL);
> 
>   // Stuff
> 
>   assert (mbuffer != NULL);
>   delete[] mbuffer;   // Sometimes crashed here (not always).
>   mbuffer = NULL;
> 
>   // Stuff
> }
> 
> How can one detect what causes the crash?

The code you show is fine, though you should check for the returnvalue of
new (hint: assert() is not enough). Please reduce that to a minimal
example that reproduces the described behaviour and make a backtrace while
running in a debugger. Also, is this specific to g++ and/or Cygwin? I
guess the problem is in the code you don't show, something like smashing
the stack/heap or so.

Uli

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