found a bug by accident.

- bugfix for setting string defaults in rna functions (incorrect pointer use and would copy past string length).
- Object.dm_info was setting a default when it didnt need to.

source/blender/makesrna/intern/rna_object_api.c

@@ -643,7 +643,7 @@ void RNA_api_object(StructRNA *srna)
 	parm= RNA_def_enum(func, "type", mesh_dm_info_items, 0, "", "Modifier settings to apply");
 	RNA_def_property_flag(parm, PROP_REQUIRED);
 	/* weak!, no way to return dynamic string type */
-	parm= RNA_def_string(func, "result", "result", 16384, "result", "");
+	parm= RNA_def_string(func, "result", "", 16384, "result", "");
 	RNA_def_property_flag(parm, PROP_THICK_WRAP); /* needed for string return value */
 	RNA_def_function_output(func, parm);
 #endif /* NDEBUG */