[Issue 21184] Unimplemented methods of interface are not reported as errors during compilation.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21184

--- Comment #2 from alexandru.ermicioi at gmail.com ---
This is in .d file, and is completely clear that is a bug, since you can't have
an unimplemented method. Only abstract methods may not have a body, since it is
expected to be implemented somewhere else.

I struggle to even understand how you could implement such a method given it is
a D method, not c++ one.

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