Fix bug where single statements could not be executed in the REPL

src/parse.rs

@@ -13,6 +13,7 @@ struct ParseError {
     line: Option<usize>,
 }
 
+#[derive(Debug)]
 enum ParsedStatement {
     Stmt { stmt: Stmt },
     ImplicitStmt { stmt: Stmt, line_number: usize },
@@ -32,9 +33,13 @@ pub fn parse_repl_line<I: Iterator<Item = Token> + Clone, F: FnMut(ScriptError)>
 ) -> Vec<Stmt> {
     let mut statements = parse(iter, &mut on_error);
     if statements.len() == 1 {
-        if let ParsedStatement::ImplicitStmt { stmt, .. } = statements.remove(0) {
+        let removed = statements.remove(0);
+        if let ParsedStatement::ImplicitStmt { stmt, .. } = removed {
             return vec![stmt];
         }
+
+        // Put this statement back if it didn't match, otherwise we will execute nothing
+        statements.push(removed);
     }
 
     ensure_parsed_statements_explicit(statements, on_error)