error: this `if` expression is missing a block after the condition
  --> $DIR/accidental-if.rs:3:5
   |
LL |     if let Some(y) = x else {
   |     ^^
   |
help: add a block here
  --> $DIR/accidental-if.rs:3:23
   |
LL |     if let Some(y) = x else {
   |                       ^
help: remove the `if` if you meant to write a `let...else` statement
   |
LL -     if let Some(y) = x else {
LL +     let Some(y) = x else {
   |

error: aborting due to 1 previous error