May 30, 2012
http://d.puremagic.com/issues/show_bug.cgi?id=8170

           Summary: Incorrect member initialization in associative array
                    of structs
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: juhonurm@gmail.com


--- Comment #0 from Juho Nurminen <juhonurm@gmail.com> 2012-05-30 13:53:17 PDT ---
The code below throws an assert error:

void main()
{
    struct S
    {
        void* ptr = null;

        S opAssign(int)
        {
            assert (ptr is null);
            return this;
        }
    }

    S[int] s;
    s[0] = 0;
}

In an associative array, ptr is not initialized to null before opAssign is called.

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September 22, 2013
http://d.puremagic.com/issues/show_bug.cgi?id=8170


Kenji Hara <k.hara.pg@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


--- Comment #1 from Kenji Hara <k.hara.pg@gmail.com> 2013-09-22 10:51:54 PDT ---
(In reply to comment #0)
> The code below throws an assert error:
> 
> void main()
> {
>     struct S
>     {
>         void* ptr = null;
> 
>         S opAssign(int)
>         {
>             assert (ptr is null);
>             return this;
>         }
>     }
> 
>     S[int] s;
>     s[0] = 0;
> }
> 
> In an associative array, ptr is not initialized to null before opAssign is called.

When you call opAssign directly, it would throw RangeError.

     S[int] s;
     s[0].opAssign(0);

So the OP code should also throw RangeError.

*** This issue has been marked as a duplicate of issue 6178 ***

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