error message does not include function it refers to, only says "this function" (E0061)

[codyps]

error[E0061]: this function takes 2 parameters but 1 parameter was supplied
  --> src/main.rs:63:13
   |
63 |             std::net::SocketAddr::new(ia, 0u16)
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 2 parameters

error: aborting due to previous error

In this case, this function is tokio_core::net::UdpSocket::bind, but without looking at the code no hint is given:

        let sock = tokio_core::net::UdpSocket::bind(
            std::net::SocketAddr::new(ia, 0u16)
        ).unwrap();

Originally, this function call contained a match statement to calculate the value of ia, which caused the newline-following paren style to be used.

This appears to occur whenever both:

• using a newline-following paren style (such that the function name does not get included in the context output)
• calling a function from outside the current crate (so that it's definition is not printed)

[oli-obk]

Duplicate of #42855

The span should point to ia

[codyps]

closing as dup of #42855

[codyps]

Actually, this looks like a slightly different issue.

ia isn't the problem here. std::net::SocketAddr::new() takes two arguments, but tokio_core::net::UdpSocket::bind also takes 2 arguments, but isn't mentioned in the error message. (this function is tokio_core::net::UdpSocket::bind).