Rust Analyzer false positive: "expected pattern" in match expression 🐛

Summary

The Rust Analyzer extension shows Syntax Error: expected pattern, when an unbounded RangeFrom range pattern is already present.

See line 24 below. Line 26 is already correct.

    let x = 5;
    let y: i32 = 0; 
    let z = 5;
    match x {
        z => {
            println!("It's five!");
        }
        6.. if y == 1 => {
        }
        6.. {
        }
    }

Expected Behavior

Rust Analyzer should display only the error "Expected: FAT_ARROW".

Actual Behavior

Rust Analyzer displays two errors:

• Expected: FAT_ARROW
• expected pattern

rust-analyzer version: v0.3.1623

rustc version: rustc 1.70.0 (90c541806 2023-05-31)

relevant settings: (eg. client settings, or environment variables like CARGO, RUSTC, RUSTUP_HOME or CARGO_HOME)

Reproduce the report with the Rust match-expression snippet and compare the diagnostics around the unbounded range pattern. No source file or test is named, so locate the parser or diagnostic entry point for match expressions first. Done means the reproduction shows only the expected FAT_ARROW error without the false “expected pattern” diagnostic.