Fix parse error throwing a TypeError, instead of SyntaxError (#748)

boa/src/context.rs

@@ -492,7 +492,7 @@ impl Context {
 
         let result = match Self::parser_expr(src) {
             Ok(expr) => expr.run(self),
-            Err(e) => self.throw_type_error(e),
+            Err(e) => self.throw_syntax_error(e),
         };
 
         // The main_timer needs to be dropped before the BoaProfiler is.

boa/src/exec/tests.rs

@@ -1377,3 +1377,9 @@ fn test_conditional_op() {
     let scenario = "1 === 2 ? 'a' : 'b'";
     assert_eq!(&exec(scenario), "\"b\"");
 }
+
+#[test]
+fn test_identifier_op() {
+    let scenario = "break = 1";
+    assert_eq!(&exec(scenario), "\"SyntaxError\": \"expected token \'identifier\', got \'=\' in binding identifier at line 1, col 7\"");
+}