[Issue 15192] New: DIP25: Nested ref returns are type checked unsoundly

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15192

          Issue ID: 15192
           Summary: DIP25: Nested ref returns are type checked unsoundly
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: timon.gehr at gmx.ch

The following code corrupts memory:

enum N=100;
ref int[N] fun(ref int[N] x)@safe{
    ref int[N] bar(){ return x; }
    return bar();
}
ref int[N] hun()@safe{
    int[N] k;
    return fun(k);
}

void bang(ref int[N] x)@safe{ x[]=0x25BAD; }
void main()@safe{ bang(hun); }

--