[Issue 21740] Typeof mixin regression with v2.096

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21740

--- Comment #6 from moonlightsentinel at disroot.org ---
Assume pragma(msg, typeof(mixin(foo())));

void foo() {}
=> void

string foo() { return "foo"; }
=> string() // function type

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