[Issue 18066] duplicate symbol error when symbol is in a ".o" and a ".a" ; linker should accept it to allow partial recompilation

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18066

--- Comment #3 from Timothee Cour <timothee.cour2 at gmail.com> ---
NOTE: there's also the mystery that "import std.file;" is somehow special and
other imports don't have this error.

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