https://issues.dlang.org/show_bug.cgi?id=20011

          Issue ID: 20011
           Summary: [REG] modification of member of a manifest constant
                    that's also a struct is allowed
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: accepts-invalid
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: b2.temp@gmx.com

This is invalid code is not rejected anymore in latest ~master

---
struct Content{ubyte parts;}

void main(){
    enum Content content = {};
    content.parts = 2;
}
---

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