| error[E0308]: mismatched types | 
 |   --> $DIR/issue-86100-tuple-paren-comma.rs:9:22 | 
 |    | | 
 | LL |     let _x: (i32,) = (5); | 
 |    |             ------   ^^^ expected `(i32,)`, found integer | 
 |    |             | | 
 |    |             expected due to this | 
 |    | | 
 |    = note: expected tuple `(i32,)` | 
 |                found type `{integer}` | 
 | help: use a trailing comma to create a tuple with one element | 
 |    | | 
 | LL |     let _x: (i32,) = (5,); | 
 |    |                        + | 
 |  | 
 | error[E0308]: mismatched types | 
 |   --> $DIR/issue-86100-tuple-paren-comma.rs:13:9 | 
 |    | | 
 | LL |     foo((Some(3))); | 
 |    |     --- ^^^^^^^^^ expected `(_,)`, found `Option<{integer}>` | 
 |    |     | | 
 |    |     arguments to this function are incorrect | 
 |    | | 
 |    = note: expected tuple `(_,)` | 
 |                found enum `Option<{integer}>` | 
 | note: function defined here | 
 |   --> $DIR/issue-86100-tuple-paren-comma.rs:5:4 | 
 |    | | 
 | LL | fn foo<T>(_t: (T,)) {} | 
 |    |    ^^^    -------- | 
 | help: use a trailing comma to create a tuple with one element | 
 |    | | 
 | LL |     foo((Some(3),)); | 
 |    |                 + | 
 |  | 
 | error[E0308]: mismatched types | 
 |   --> $DIR/issue-86100-tuple-paren-comma.rs:17:22 | 
 |    | | 
 | LL |     let _s = S { _s: ("abc".to_string()) }; | 
 |    |                      ^^^^^^^^^^^^^^^^^^^ expected `(String,)`, found `String` | 
 |    | | 
 |    = note: expected tuple `(String,)` | 
 |              found struct `String` | 
 | help: use a trailing comma to create a tuple with one element | 
 |    | | 
 | LL |     let _s = S { _s: ("abc".to_string(),) }; | 
 |    |                                        + | 
 |  | 
 | error[E0308]: mismatched types | 
 |   --> $DIR/issue-86100-tuple-paren-comma.rs:23:22 | 
 |    | | 
 | LL |     let _x: (i32,) = (t); | 
 |    |             ------   ^^^ expected a tuple with 1 element, found one with 2 elements | 
 |    |             | | 
 |    |             expected due to this | 
 |    | | 
 |    = note: expected tuple `(i32,)` | 
 |               found tuple `({integer}, {integer})` | 
 |  | 
 | error: aborting due to 4 previous errors | 
 |  | 
 | For more information about this error, try `rustc --explain E0308`. |