• d-bugmail puremagic.com (40/40) Oct 04 https://issues.dlang.org/show_bug.cgi?id=24796

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=24796

          Issue ID: 24796
           Summary: Confusing irrelevant 'cannot pass rvalue argument'
                    error message on a type error
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: andy-hanson protonmail.com

```
void main() {
        foo(Asdf());
}

void foo(in Asdg x) {}

struct Asdf {}
struct Asdg {
        int a;
        int b;
        int c;
        int d;
        int e;
}
```

Compiling with `dmd a.d -preview=in` I get this error message:
```
a.d(2): Error: function `foo` is not callable using argument types `(Asdf)`
a.d(2):        cannot pass rvalue argument `Asdf()` of type `Asdf` to parameter
`in Asdg x`
a.d(5):        `a.foo(in Asdg x)` declared here
```

The error message appears to be complaining about an rvalue. The error is
actually just due to using the wrong type, and an rvalue of the correct type
would work.
The issue does not reproduce if the correct type has less than 5 fields.

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