fix: use peek_char instead of next_char

boa_engine/src/syntax/lexer/comment.rs

@@ -34,12 +34,13 @@ impl<R> Tokenizer<R> for SingleLineComment {
         let _timer = Profiler::global().start_event("SingleLineComment", "Lexing");
 
         // Skip either to the end of the line or to the end of the input
-        while let Some(ch) = cursor.next_char()? {
+        while let Some(ch) = cursor.peek_char()? {
             let tried_ch = char::try_from(ch);
             match tried_ch {
                 Ok(c) if c == '\r' || c == '\n' || c == '\u{2028}' || c == '\u{2029}' => break,
                 _ => {}
             };
+            cursor.next_char().expect("Comment character vanished");
         }
         Ok(Token::new(
             TokenKind::Comment,