(www) Refer to the subsection on signal handlers in Section 11.4.3.2 on handling run-time errors….

(www) Refer to the subsection on signal handlers in Section 11.4.3.2 on handling run-time errors. Consider the following code fragment in a language that allows a exception handler to resume at the point where the error occurred: X := A / B; Y := A / B; An optimizing compiler wants to transform this code into: X := A / B; Y := X; Explain why, if an exception handler is de?ned for the code fragment, this optimization is incorrect.