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# Error code E0243

#### Note: this error code is no longer emitted by the compiler.

This error indicates that not enough type parameters were found in a type or trait.

For example, the `Foo` struct below is defined to be generic in `T`, but the type parameter is missing in the definition of `Bar`:

    #![allow(unused)]
    fn main() {
    struct Foo<T> { x: T }

    struct Bar { x: Foo }
    }