Fix undefined behaviour of global object freezing

Freezing the global object and later trying to add properties to it caused an assertion error (issue #2105). This patch fixes the issue. JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@inf.u-szeged.hu
2017-11-23 13:48:26 +01:00
parent 1ed886b872
commit a1df9c1420
3 changed files with 60 additions and 1 deletions
@@ -146,6 +146,11 @@ ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environme
    ecma_object_t *binding_obj_p = ecma_get_lex_env_binding_object (lex_env_p);

    ecma_value_t completion;
+    if (!ecma_get_object_extensible (binding_obj_p))
+    {
+      return ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
+    }
+
    completion = ecma_builtin_helper_def_prop (binding_obj_p,
                                               name_p,
                                               ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED),