[Issue 12242] conflict error with public imports

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12242

--- Comment #12 from Martin Nowak <code at dawg.eu> ---
I don't like the term cross module overload set, because an overload sets is a
set of overloads from different modules (or mixin templates) by definition.
The bug resolution to flatten all nested overload sets into a single overload
set seems to be semantically correct.

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