The example below changes its behaviour during optimization.
From some iteration it starts to print null instead '/ by zero'.

See example below:
(check with java -server Main and java -Xint)
class Main {
    private void testDivisionByZero() {
        try {
            int i = 0;
            @SuppressWarnings("unused")
            int j = 17 / i;
        } catch (ArithmeticException e) {
            System.err.println(e.getMessage());
            return;
        }
        throw new Error("Failure in testDivisionByZero");
    }

public static void main(String[] args) {
Main main = new Main();
while(true) {
main.testDivisionByZero();
}
}
    
}