This error indicates that too many type parameters were found in a type or trait.
For example, the Foo struct below has no type parameters, but is supplied with two in the definition of Bar:
#![allow(unused)]
fn main() {
struct Foo { x: bool }
struct Bar<S, T> { x: Foo<S, T> }
}
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/error_codes/E0244.html