[Issue 15966] [REG 2.071] {public,protected} imports in base class ignored on symbol lookup

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15966

--- Comment #5 from Walter Bright <bugzilla at digitalmars.com> ---
> Since we import it as protected, subclasses should be able to override
> this function without import

This is easily resolved by adding:

    import core.exception : AssertError;

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