1.26.3.Attempting to access a local variable from a nested method.
class MainClass{ public static void main(String [] args) {
MainClass s = new MainClass();
s.go();
} void go() { int y = 5;
go2();
y++; // once go2() completes, y is back in scope
} void go2() {
y++; // won't compile, y is local to go()
}
}