builtinimport: If there was error compiling imported module, raise exception.

py/builtinimport.c

@@ -122,7 +122,7 @@ void do_load(mp_obj_t module_obj, vstr_t *file) {
         // TODO handle compile error correctly
         mp_locals_set(old_locals);
         mp_globals_set(old_globals);
-        return;
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_SyntaxError, "Syntax error in imported module"));
     }
 
     // complied successfully, execute it