[Issue 22579] Unittests defined in a template are instantiated indiscriminately in betterC mode AND cause inscrutable errors

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22579

Paul Backus <snarwin+bugzilla at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |snarwin+bugzilla at gmail.com

--- Comment #1 from Paul Backus <snarwin+bugzilla at gmail.com> ---
Here's a full example that reproduces the error:

--- issue22579.d
template canon(string v)
{
    unittest
    {
                class A { this(int n) {} }
                class B {}
        Object[] arr = [new A(1), new B(), null];
    }
}
--- main.d
import issue22579;

alias _ = canon!"";
extern(C) int main() { return 0; }
---

Compile with the following command:

---
dmd -betterC -unittest main.d issue22579.d
---

run.dlang.io link: https://run.dlang.io/is/VtkBvu

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