[Issue 14549] isVirtualMethod does not work well with Github DMD

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14549

--- Comment #2 from Puneet Goel <puneet at coverify.org> ---
(In reply to Kenji Hara from comment #1)
> https://github.com/D-Programming-Language/dmd/pull/4635

Sorry for checking this late.

This PR causes another regression for me. I will file it in a couple of hours.

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