Re: [Swarm-Support] I have the strangest seg fault (ever)!

[Marcus G. Daniels]

Paul Johnson wrote:

> Do you think it would be better if the EZGraph made a copy of the 
> color array?  Rather than just keeping a pointer to some memory?

Nah, I think that kind of usage is just something one has to be careful 
about in C.  A single literal string like "foobar" will persist in 
memory and has a single address in a program no matter what.   The 
problem in your case wasn't the literals, it was the pointers to 
them.    That was being initialized on the stack for the method, and 
then the stack was unwound on exit, leaving a pointer to the stack, but 
one that was no longer valid.   Like pointing to spot in the ocean, but 
without the boat.  Using a type of `static' moves that memory from the 
stack to the permanent heap, and using an ivar moves it to the temporary 
heap (typically same area of the memory but can be recycled); both can 
be used to make that array of pointers valid across functions or method 
calls.