2.6. Runtime error handling
When an exception is not handled by Quirrel code with a try/catch statement, a runtime error is raised and the execution of the current program is interrupted. It is possible to set a call back function to intercept the runtime error from the host program; this is useful to show meaningful errors to the script writer and for implementing visual debuggers. The following API call pops a Quirrel function from the stack and sets it as error handler.:
SQUIRREL_API void sq_seterrorhandler(HSQUIRRELVM v);
The error handler is called with 2 parameters, an environment object (this) and a object. The object can be any quirrel type.