scope parameter has effect only on pointers?

[Neto]

this give the error:

```d
@safe:
int *gp2;
int g(scope int *p)
{
	gp2 = p;
	return -1;
}
```

>  Error: scope variable p assigned to non-scope gp2

but this one doesn't give any error:

```d
@safe:

int gg;

int f(scope int c)
{
	int k = c;
	gg = c;
	return k * 8;
}
```

this is why `c` is a "simple variable" can be allocated onto 
stack and copied without any issue? if not, why exactly this one 
doesn't give error?