Compiler Warning (level 4) C4703
Potentially uninitialized local pointer variable 'name' used
Remarks
The local pointer variable name might have been used without being assigned a value. This access could lead to unpredictable results.
The /sdl
(Enable Additional Security Checks) compiler option elevates this warning to an error.
Example
The following code generates C4701 and C4703.
#include <malloc.h>
void func(int size)
{
void* p;
if (size < 256) {
p = malloc(size);
}
if (p != nullptr) // C4701 and C4703
free(p);
}
int main()
{
func(9);
}
c:\src\test.cpp(10) : warning C4701: potentially uninitialized local variable 'p' used
c:\src\test.cpp(10) : warning C4703: potentially uninitialized local pointer variable 'p' used
To correct this warning, initialize the variable as shown in this example:
#include <malloc.h>
void func(int size)
{
void* p = nullptr;
if (size < 256) {
p = malloc(size);
}
if (p != nullptr)
free(p);
}
int main()
{
func(9);
}
See also
Compiler Warning (level 4) C4701
Warnings, /sdl
, and improving uninitialized variable detection
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