error[E0308]: mismatched types
--> $DIR/issue-12552.rs:6:5
|
+LL | match t {
+ | - this match expression has type `std::result::Result<_, {integer}>`
LL | Some(k) => match k { //~ ERROR mismatched types
| ^^^^^^^ expected enum `std::result::Result`, found enum `std::option::Option`
|