[Issue 22977] [dip1000] can escape scope pointer returned by nested function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22977

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
Interestingly, if `scope return` is added to `fn()`:

 int* gPtr;

 void main() @safe
 {
    scope int* sPtr;
    int* fn() scope return { return sPtr; }
    gPtr = fn();
 }

The correct error is generated:

 Error: reference to stack allocated value returned by `fn()` assigned to
non-scope `gPtr`

--