...error message");
    // unconditional structure code
}

unittest {
    gudtUGC!int;
}
```

which fails with

```
example.d(4): Error...

...struct gudtUGC(T) {
    static assert(isString!T, "error message");
    // unconditional structure code
}
```

case 2:

```d...

...to the `else` branch makes the assert message show up:

    } else {
        alias ResultType = void;
        static...

...15,39):        Previous initialization is here.
---

The error message is false: there is only a...

...123;
    SumType!(int*) s = &n;
}
---

The error message is:

---
Error: reference to local variable `n...

...dmd pull request #12852 "Fix issue 14064 - Error message about @ attributes incomplete" was merged into...

...d
string s = __FUNCTION__ ~ "This is an error message";
```

And no GC allocations occur. Even...

...issue 14064 - Error message about @ attributes incomplete" fixing this issue:

- fix issue 14064 - message about...

...nogc
void main() {
  enum msg = __FUNCTION__ ~ "This is an error message";
  assert(false, msg);
}

Ali

...nsecs";
```

and I get the following error message:

"Error: cannot implicitly convert expression \`dur.total...