Leaking may be an issue. This currently works:
```
static const(int)* global;
auto foo(const int param)
{
return { global = ¶m; return param + 10; };
}
void main()
{
{
int arg = 42;
auto dg = foo(42);
auto r = dg();
assert(r == 52);
}
assert(*global == 42);
}
```
`global` would be dangling as soon as the delegate `dg` goes out
of scope.