[Issue 23739] Can't return by ref from opApply iteration

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23739

timon.gehr at gmx.ch changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |safe

--- Comment #1 from timon.gehr at gmx.ch ---
This bug can cause memory corruption in @safe code:

---
struct S{
    int* x;
    int opApply(scope int delegate(ref int* x)@safe dg)@safe{
        return dg(x);
    }
}

ref int* foo(ref S s)@safe{
    foreach(x;s)
        return x;
    assert(0);
}

void main()@safe{
    auto s=new S;
    *foo(*s)=2; // segfault
}
---

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