## E0210: unopened block comment

Block comments start with `/*` and end with `*/`. It is a syntax error for a block comment to end but not start:

    //
    // this code is really complicated.
    // some might say too complicated.
    */
    function yes() {
      return true;
    }

    /*
    console.log("[debug] state:");
    debugPrint(state, /*depth=*/3);
    */

    let heightInFeet = heightInCM */ 3.28;

To fix this error, remove the `*/`:

    //
    // this code is really complicated.
    // some might say too complicated.
    function yes() {
      return true;
    }

Alternatively, use `//` or `if (false)` to avoid nesting block comments:

    if (false) {
      console.log("[debug] state:");
      debugPrint(state, /*depth=*/3);
    }

Alternatively, write an expression between `*` and `/`:

    let heightInFeet = heightInCM * 100 / 3.28;

Documentation for other errors