[Issue 21614] compiled imports: core.exception.AssertError at src/dmd/semantic3.d(812): Assertion failure

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21614

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject.org> ---
In the unreduced test, a function that is marked `inferRetType` has a return
statement, but the return type is inferred as `void` (possibly because semantic
never finished for it).  Hence the assert is triggered.

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