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warning C6386: buffer overrun: accessing <buffer name>, the writable size is <size1> bytes, but <size2> bytes may be written: Lines: x, y
This warning indicates that the writable extent of the specified buffer might be smaller than the index used to write to it. This can cause buffer overrun.
Example
The following code generates both this warning and C6201:
#define MAX 25
void f ( )
{
char ar[MAX];
//Code ...
ar[MAX] = '\0';
}
To correct both warnings, use the following code:
#define MAX 25
void f ( )
{
char a[MAX];
// code...
a[MAX - 1] = '\0';
}