QA·C Help - 4140

	4140	Address of automatic object exported in function return value.

Pointers		REFERENCE - ISO:C90-6.1.2.4 Storage Durations of Objects

The address of an automatic object is being used as the return expression of a function. This is dangerous. On return from this function, the object will go out of scope and the value obtained by dereferencing the pointer will be undefined. Perhaps the object needs to be declared static ?

For example:


/*PRQA S 2017,3408,3447 ++*/

int *func ( void )
{
    int a = 0;

    return &a;                   /* Message 4140 */
}

See also:

3217 Address of automatic object exported to a pointer with linkage or wider scope.
3225 Address of automatic object exported using a function parameter.
3230 Address of automatic object assigned to local pointer with static storage duration.

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