[Issue 15857] incorrect checkimports mismatch for overload sets

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15857

--- Comment #12 from Martin Nowak <code at dawg.eu> ---
Looks like the caching fails for imports because of this
https://github.com/dlang/dmd/blob/82c5682edbd876767d3853bd6fdd2cc70ebfa73b/src/dsymbol.d#L1283
condition.

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