Revert "Switching get_variable_value to returning value through ecma-stack (stack convention)."

This reverts commit 6415130925187a877b83b14db40cade0c336ea44.

src/libcoreint/opcodes-varg.c

@@ -31,7 +31,7 @@ fill_varg_list (int_data_t *int_data, /**< interpreter context */
                 ecma_length_t args_number, /**< number of arguments */
                 ecma_value_t arg_values[], /**< out: arguments' values */
                 ecma_length_t *out_arg_number_p) /**< out: number of arguments
-                                                           successfully read */
+                                                      successfully read */
 {
   ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
 
@@ -50,14 +50,16 @@ fill_varg_list (int_data_t *int_data, /**< interpreter context */
 
       const idx_t varg_var_idx = next_opcode.data.meta.data_1;
 
-      ECMA_TRY_CATCH_STACKED (arg,
-                              get_variable_value (int_data, varg_var_idx, false),
-                              ret_value,
-                              int_data->stack_frame_p);
+      ecma_completion_value_t get_arg_completion = get_variable_value (int_data, varg_var_idx, false);
 
-      arg_values[arg_index] = ecma_copy_value (arg, true);
-
-      ECMA_FINALIZE_STACKED (arg, int_data->stack_frame_p);
+      if (ecma_is_completion_value_normal (get_arg_completion))
+      {
+        arg_values[arg_index] = ecma_get_completion_value_value (get_arg_completion);
+      }
+      else
+      {
+        ret_value = get_arg_completion;
+      }
     }
     else
     {