error: this file contains an unclosed delimiter
  --> $DIR/unclosed-braces.rs:22:52
   |
LL | fn main() {
   |           - unclosed delimiter
...
LL |         {
   |         - this delimiter might not be properly closed...
...
LL |     }
   |     - ...as it matches this but it has different indentation
...
LL |
   |                                                   ^

error: aborting due to 1 previous error