[
    MappedRustDiagnostic {
        url: Url {
            scheme: "file",
            host: None,
            port: None,
            path: "/test/compiler/ty/list_iter.rs",
            query: None,
            fragment: None,
        },
        diagnostic: Diagnostic {
            range: Range {
                start: Position {
                    line: 51,
                    character: 4,
                },
                end: Position {
                    line: 51,
                    character: 47,
                },
            },
            severity: Some(
                Error,
            ),
            code: Some(
                String(
                    "E0053",
                ),
            ),
            code_description: None,
            source: Some(
                "rustc",
            ),
            message: "method `next` has an incompatible type for trait\nexpected type `fn(&mut ty::list_iter::ListIterator<\'list, M>) -> std::option::Option<&ty::Ref<M>>`\n   found type `fn(&ty::list_iter::ListIterator<\'list, M>) -> std::option::Option<&\'list ty::Ref<M>>`",
            related_information: None,
            tags: None,
            data: None,
        },
        fixes: [],
    },
]