error[E0004]: non-exhaustive patterns: `&_` not covered
  --> $DIR/issue-30240.rs:12:11
   |
LL |     match "world" { //~ ERROR non-exhaustive patterns: `&_`
   |           ^^^^^^^ pattern `&_` not covered

error[E0004]: non-exhaustive patterns: `&_` not covered
  --> $DIR/issue-30240.rs:16:11
   |
LL |     match "world" { //~ ERROR non-exhaustive patterns: `&_`
   |           ^^^^^^^ pattern `&_` not covered

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0004`.