[Issue 18474] New: Postblit not working in shared structs

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18474

          Issue ID: 18474
           Summary: Postblit not working in shared structs
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: edi33416 at gmail.com

The postblit for shared struct is not working as expected, as it is not
infering the `shared` attribute.

For the snippet bellow

shared struct A
{
    this(this);
}

struct B
{
    A a;
}

void main()
{
    shared B b1;
    auto b2 = b1;
}

the compiler gives the following error:

Error: non-shared method test.B.__fieldPostblit is not callable using a shared
object

The current workaround for this is to define `A` s postblit as
this(shared this);

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