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digitalmars.D.bugs - [Issue 16011] New: [REG2.068] recursive RefCounted used to work


          Issue ID: 16011
           Summary: [REG2.068] recursive RefCounted used to work
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Keywords: rejects-valid
          Severity: regression
          Priority: P1
         Component: phobos
          Assignee: nobody puremagic.com
          Reporter: ag0aep6g gmail.com

See also this post to D.learn by Lodovico Giaretta:
http://forum.dlang.org/post/mwzkptquptwfpuvtmqoh forum.dlang.org

import std.typecons: RefCounted;

struct S
    int x;
    RefCounted!S s;

void main()
    S s;
    s.x = 1;
    s.s.x = 2;
    s.s.s.x = 3;

    assert(s.x == 1);
    assert(s.s.x == 2);
    assert(s.s.s.x == 3);

2.067.1: Compiles and passes asserts.
2.068.2, 2.069.2: segfault
2.070.2, 2.071.0: "no size yet for forward reference" errors
git master (bc74f4a): "std/typecons.d(4739): Error: forward reference to

Marking this as a phobos regression. I have a reduction, but that works up to
2.069, so there may be something else going on. Filing that separately.

May 10 2016