| error: expected `{`, found keyword `let` | 
 |   --> $DIR/block-no-opening-brace.rs:9:9 | 
 |    | | 
 | LL |     loop | 
 |    |     ---- while parsing this `loop` expression | 
 | LL |         let x = 0; | 
 |    |         ^^^ expected `{` | 
 |    | | 
 | help: you might have meant to write this as part of a block | 
 |    | | 
 | LL |         { let x = 0; } | 
 |    |         +            + | 
 |  | 
 | error: expected `{`, found keyword `let` | 
 |   --> $DIR/block-no-opening-brace.rs:15:9 | 
 |    | | 
 | LL |     while true | 
 |    |     ----- ---- this `while` condition successfully parsed | 
 |    |     | | 
 |    |     while parsing the body of this `while` expression | 
 | LL |         let x = 0; | 
 |    |         ^^^ expected `{` | 
 |    | | 
 | help: you might have meant to write this as part of a block | 
 |    | | 
 | LL |         { let x = 0; } | 
 |    |         +            + | 
 |  | 
 | error: expected `{`, found keyword `let` | 
 |   --> $DIR/block-no-opening-brace.rs:20:9 | 
 |    | | 
 | LL |         let x = 0; | 
 |    |         ^^^ expected `{` | 
 |    | | 
 | help: you might have meant to write this as part of a block | 
 |    | | 
 | LL |         { let x = 0; } | 
 |    |         +            + | 
 |  | 
 | error: expected expression, found reserved keyword `try` | 
 |   --> $DIR/block-no-opening-brace.rs:26:5 | 
 |    | | 
 | LL |     try | 
 |    |     ^^^ expected expression | 
 |  | 
 | error: expected one of `move`, `use`, `{`, `|`, or `||`, found keyword `let` | 
 |   --> $DIR/block-no-opening-brace.rs:32:9 | 
 |    | | 
 | LL |     async | 
 |    |          - expected one of `move`, `use`, `{`, `|`, or `||` | 
 | LL |         let x = 0; | 
 |    |         ^^^ unexpected token | 
 |  | 
 | error: expected expression, found keyword `const` | 
 |   --> $DIR/block-no-opening-brace.rs:38:13 | 
 |    | | 
 | LL |     let x = const 2; | 
 |    |             ^^^^^ expected expression | 
 |  | 
 | error: expected identifier, found keyword `const` | 
 |   --> $DIR/block-no-opening-brace.rs:45:9 | 
 |    | | 
 | LL |         const 2 => {} | 
 |    |         ^^^^^ expected identifier, found keyword | 
 |  | 
 | error: expected one of `=>`, `if`, or `|`, found `2` | 
 |   --> $DIR/block-no-opening-brace.rs:45:15 | 
 |    | | 
 | LL |         const 2 => {} | 
 |    |               ^ expected one of `=>`, `if`, or `|` | 
 |  | 
 | error: aborting due to 8 previous errors | 
 |  |