[Issue 18557] New: Types with 0 size should not be usable as aa key types

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18557

          Issue ID: 18557
           Summary: Types with 0 size should not be usable as aa key types
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: bugzilla at digitalmars.com

Summary says it all.

  struct S { }
  int[S] aa;   // should fail to compile

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