The Your first script page of the online manual contains code for a helper function print that passes an unchecked format string to printf. If that string contains some formatting symbols like %s, the application is likely to crash. Since users may be likely to copy that function without thinking, I believe it's important to fix this - either by changing the call to printf("%s", msg.c_str()); or by using an altogether more C++-ish method.

Good catch. I'll have this updated before releasing 2.15.2.