[Issue 22093] New: [Reg 2.097] std.typecons.RefCounted!T for struct T without an explicit toString or alias this previously could be converted to string even when uninitialized but now cannot be

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22093

          Issue ID: 22093
           Summary: [Reg 2.097] std.typecons.RefCounted!T for struct T
                    without an explicit toString or alias this previously
                    could be converted to string even when uninitialized
                    but now cannot be
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: n8sh.secondary at hotmail.com

Below code compiles up through 2.096 but in 2.097 fails with "Attempted to
access an uninitialized payload".

---
import std.conv : to;
import std.typecons : RefCounted, RefCountedAutoInitialize;

static struct A { int a; }
alias R = RefCounted!(A, RefCountedAutoInitialize.no);
enum e = to!string(R.init);
---

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