[Issue 19767] New: Classes that inherit from an interface can override static interface methods

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19767

          Issue ID: 19767
           Summary: Classes that inherit from an interface can override
                    static interface methods
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: edi33416 at gmail.com

This directly contradicts the interface
[spec](https://dlang.org/spec/interface.html), pt. 8:

"Classes that inherit from an interface may not override final or static
interface member functions."

interface D
{
    void bar();
    static void foo() { }
}

class C : D
{
    void bar() { } // ok
    void foo() { } // BUG: this is ok, but should error because we cannot
override static D.foo()
}

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