| //! Previously we would try to issue a suggestion for `let x <op>= 1`, i.e. a compound assignment |
| //! within a `let` binding, to remove the `<op>`. The suggestion code unfortunately incorrectly |
| //! assumed that the `<op>` is an exactly-1-byte ASCII character, but this assumption is incorrect |
| //! because we also recover Unicode-confusables like `➖=` as `-=`. In this example, the suggestion |
| //! code used a `+ BytePos(1)` to calculate the span of the `<op>` codepoint that looks like `-` but |
| //! the mult-byte Unicode look-alike would cause the suggested removal span to be inside a |
| //! multi-byte codepoint boundary, triggering a codepoint boundary assertion. |
| //! |
| //! issue: rust-lang/rust#128845 |
| |
| fn main() { |
| // Adapted from #128845 but with irrelevant components removed and simplified. |
| let x ➖= 1; |
| //~^ ERROR unknown start of token: \u{2796} |
| //~| ERROR: can't reassign to an uninitialized variable |
| } |
