Avoiding 'Buffer Overrun' C6386 warning

1
votes

In my code, I am using an array xyz of 10 objects. When I am trying to access an element of the array using an unsigned int index like this: xyz[level], I get 'Buffer overrun' warning. Logically, I am pretty sure that level won't exceed 10. How to avoid this warning?

2
c++windowsvisual-c++warningsbuffer-overrun
Can you post the code where you're getting the warning? - Dean Harding
Not sure. This is a pretty big code base I am working on. I am trying to reproduce it with a small example. Let me post it when I succeed. Thanks! - bdhar

2 Answers

9
votes

I'm probably teaching my grandmother to suck eggs here, but do remember that "level won't exceed 10" is wrong for an array of size 10:

char a[10];
a[10] = '\0';  // Bug, and "Buffer Overrun" warning.
2
votes

Are you really sure? I never got this warning until now. So, double check.

Anyway, you can use the

#pragma warning( disable: 6386 )

preprocessor directive. I usually push and pop this to the "pragma stack"

#pragma warning( push )
#pragma warning( disable : 6386 )
// Some code
#pragma warning( pop )

as advised here.