error: expected identifier, found keyword `let`
  --> $DIR/try-block-in-edition2015.rs:6:9
   |
LL |     let try_result: Option<_> = try {
   |                                 --- while parsing this struct
LL |
LL |         let x = 5;
   |         ^^^ expected identifier, found keyword

error[E0574]: expected struct, variant or union type, found macro `try`
  --> $DIR/try-block-in-edition2015.rs:4:33
   |
LL |     let try_result: Option<_> = try {
   |                                 ^^^ not a struct, variant or union type
   |
   = note: if you want the `try` keyword, you need Rust 2018 or later
help: use `!` to invoke the macro
   |
LL |     let try_result: Option<_> = try! {
   |                                    +

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0574`.