https://issues.dlang.org/show_bug.cgi?id=16319

          Issue ID: 16319
           Summary: std.experimental.allocator.make subtly wrong with
                    nested classes
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: lodovico@giaretart.net
                CC: lodovico@giaretart.net

std.experimental.allocator.make does not initialize the implicit `this.outer`
pointer of nested classes. After you find out, it is obvious that make cannot
initialize it.
But it is subtle and may cause long hours of useless debugging to find it out.

make should either print a big red warning when used on a nested class or require an additional runtime argument to initialize the outer field with.

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