Is free(NULL) OK?

[Hal Murray]

Joel Sherrill said:
> POSIX says free(NULL) is valid and no action.

Right.  Thanks.

I should have been clearer on my question.  I'll try again.

Are there any crazy-old systems that we currently run on that will die if 
free() gets a NULL?

Checking for NULL seems like a very very handy feature so I'd be surprised 
if there were still any systems that didn't do that.  But I've been 
surprised before.


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