{"$message_type":"diagnostic","message":"mismatched types","code":{"code":"E0308","explanation":"Expected type did not match the received type.\n\nErroneous code examples:\n\n```compile_fail,E0308\nfn plus_one(x: i32) -> i32 {\n    x + 1\n}\n\nplus_one(\"Not a number\");\n//       ^^^^^^^^^^^^^^ expected `i32`, found `&str`\n\nif \"Not a bool\" {\n// ^^^^^^^^^^^^ expected `bool`, found `&str`\n}\n\nlet x: f32 = \"Not a float\";\n//     ---   ^^^^^^^^^^^^^ expected `f32`, found `&str`\n//     |\n//     expected due to this\n```\n\nThis error occurs when an expression was used in a place where the compiler\nexpected an expression of a different type. It can occur in several cases, the\nmost common being when calling a function and passing an argument which has a\ndifferent type than the matching type in the function declaration.\n"},"level":"error","spans":[{"file_name":"src\\main.rs","byte_start":1072,"byte_end":1082,"line_start":43,"line_end":43,"column_start":17,"column_end":27,"is_primary":true,"text":[{"text":"                Some(node)","highlight_start":17,"highlight_end":27}],"label":"expected `&Option<Box<Node<T>>>`, found `Option<&Box<Node<T>>>`","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src\\main.rs","byte_start":953,"byte_end":977,"line_start":39,"line_end":39,"column_start":88,"column_end":112,"is_primary":false,"text":[{"text":"fn search<'a, T: std::cmp::PartialEq>(value: &'a T, root: &'a Option<Box<Node<T>>>) -> &'a Option<Box<Node<T>>>{","highlight_start":88,"highlight_end":112}],"label":"expected `&'a Option<Box<Node<T>>>` because of return type","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"expected reference `&'a Option<Box<_>>`\n        found enum `Option<&Box<_>>`","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror[E0308]\u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15m: mismatched types\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m--> \u001b[0m\u001b[0msrc\\main.rs:43:17\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m39\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m \u001b[0m\u001b[0mfn search<'a, T: std::cmp::PartialEq>(value: &'a T, root: &'a Option<Box<Node<T>>>) -> &'a Option<Box<Node<T>>>{\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m                                                                                        \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m------------------------\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14mexpected `&'a Option<Box<Node<T>>>` because of return type\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m43\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m                Some(node)\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m                 \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^^^^^^^^\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9mexpected `&Option<Box<Node<T>>>`, found `Option<&Box<Node<T>>>`\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m= \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15mnote\u001b[0m\u001b[0m: expected reference `\u001b[0m\u001b[0m\u001b[1m\u001b[35m&'a \u001b[0m\u001b[0mOption<Box<_>>`\u001b[0m\n\u001b[0m                   found enum `Option<\u001b[0m\u001b[0m\u001b[1m\u001b[35m&\u001b[0m\u001b[0mBox<_>>`\u001b[0m\n\n"}
{"$message_type":"diagnostic","message":"mismatched types","code":{"code":"E0308","explanation":"Expected type did not match the received type.\n\nErroneous code examples:\n\n```compile_fail,E0308\nfn plus_one(x: i32) -> i32 {\n    x + 1\n}\n\nplus_one(\"Not a number\");\n//       ^^^^^^^^^^^^^^ expected `i32`, found `&str`\n\nif \"Not a bool\" {\n// ^^^^^^^^^^^^ expected `bool`, found `&str`\n}\n\nlet x: f32 = \"Not a float\";\n//     ---   ^^^^^^^^^^^^^ expected `f32`, found `&str`\n//     |\n//     expected due to this\n```\n\nThis error occurs when an expression was used in a place where the compiler\nexpected an expression of a different type. It can occur in several cases, the\nmost common being when calling a function and passing an argument which has a\ndifferent type than the matching type in the function declaration.\n"},"level":"error","spans":[{"file_name":"src\\main.rs","byte_start":1189,"byte_end":1200,"line_start":46,"line_end":46,"column_start":21,"column_end":32,"is_primary":true,"text":[{"text":"                    Some(node2)","highlight_start":21,"highlight_end":32}],"label":"expected `&Option<Box<Node<T>>>`, found `Option<&Box<Node<T>>>`","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src\\main.rs","byte_start":953,"byte_end":977,"line_start":39,"line_end":39,"column_start":88,"column_end":112,"is_primary":false,"text":[{"text":"fn search<'a, T: std::cmp::PartialEq>(value: &'a T, root: &'a Option<Box<Node<T>>>) -> &'a Option<Box<Node<T>>>{","highlight_start":88,"highlight_end":112}],"label":"expected `&'a Option<Box<Node<T>>>` because of return type","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"expected reference `&'a Option<Box<_>>`\n        found enum `Option<&Box<_>>`","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror[E0308]\u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15m: mismatched types\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m--> \u001b[0m\u001b[0msrc\\main.rs:46:21\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m39\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m \u001b[0m\u001b[0mfn search<'a, T: std::cmp::PartialEq>(value: &'a T, root: &'a Option<Box<Node<T>>>) -> &'a Option<Box<Node<T>>>{\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m                                                                                        \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m------------------------\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14mexpected `&'a Option<Box<Node<T>>>` because of return type\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m46\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m                    Some(node2)\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m                     \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^^^^^^^^^\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9mexpected `&Option<Box<Node<T>>>`, found `Option<&Box<Node<T>>>`\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m= \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15mnote\u001b[0m\u001b[0m: expected reference `\u001b[0m\u001b[0m\u001b[1m\u001b[35m&'a \u001b[0m\u001b[0mOption<Box<_>>`\u001b[0m\n\u001b[0m                   found enum `Option<\u001b[0m\u001b[0m\u001b[1m\u001b[35m&\u001b[0m\u001b[0mBox<_>>`\u001b[0m\n\n"}
{"$message_type":"diagnostic","message":"variable does not need to be mutable","code":{"code":"unused_mut","explanation":null},"level":"warning","spans":[{"file_name":"src\\main.rs","byte_start":1514,"byte_end":1522,"line_start":62,"line_end":62,"column_start":9,"column_end":17,"is_primary":true,"text":[{"text":"    let mut root = build_tree::<i32>(&v, &mut js, &flag);","highlight_start":9,"highlight_end":17}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"`#[warn(unused_mut)]` on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null},{"message":"remove this `mut`","code":null,"level":"help","spans":[{"file_name":"src\\main.rs","byte_start":1514,"byte_end":1518,"line_start":62,"line_end":62,"column_start":9,"column_end":13,"is_primary":true,"text":[{"text":"    let mut root = build_tree::<i32>(&v, &mut js, &flag);","highlight_start":9,"highlight_end":13}],"label":null,"suggested_replacement":"","suggestion_applicability":"MachineApplicable","expansion":null}],"children":[],"rendered":null}],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;11mwarning\u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15m: variable does not need to be mutable\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m--> \u001b[0m\u001b[0msrc\\main.rs:62:9\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;14m62\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m    let mut root = build_tree::<i32>(&v, &mut js, &flag);\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m         \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m----\u001b[0m\u001b[0m\u001b[1m\u001b[38;5;11m^^^^\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m         \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\u001b[0m         \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14mhelp: remove this `mut`\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m|\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;14m= \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15mnote\u001b[0m\u001b[0m: `#[warn(unused_mut)]` on by default\u001b[0m\n\n"}
{"$message_type":"diagnostic","message":"aborting due to 2 previous errors; 1 warning emitted","code":null,"level":"error","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m\u001b[38;5;15m: aborting due to 2 previous errors; 1 warning emitted\u001b[0m\n\n"}
{"$message_type":"diagnostic","message":"For more information about this error, try `rustc --explain E0308`.","code":null,"level":"failure-note","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;15mFor more information about this error, try `rustc --explain E0308`.\u001b[0m\n"}