[Issue 11952] New: struct field initialization with postblit causes un-needed destruction

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=11952

           Summary: struct field initialization with postblit causes
                    un-needed destruction
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: monarchdodra at gmail.com


--- Comment #0 from monarchdodra at gmail.com 2014-01-19 12:50:41 PST ---
Given a struct "B" with a field "sup" of type "A", where "A" has a postblit.
Then intialization "sup" triggers a postblit (good), but also destroys the
prior value of "sup" (useless).

Just the way we can avoid "assign" on first initialization, postblit
destruction should be avoided as well.

>From learn:
http://forum.dlang.org/thread/xfmqyplfxmdmrnotdzil@forum.dlang.org

In the thread, the user see a wrong amount of reference counts because of this
issue.

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