; function f() { return 23; var a = 42; } function g(x) { switch(x) { case 0: return 23; break; default: return 42; } } function h(i) { while(true) { if (!f(i++)) { break;; } } } function k() { try { h(); } catch(e) { ; } for (var p in {}); for (var i=0; i<10; ++i); } throw new Error(); f(); function l(x) { switch(x) { default: return 42; case 0: return 23; } } function m(x) { switch(x) { case 0: return 23; default: return 42; case 1: return 56; } } if (true) x; else y; function f(){ if (x) { return;; // trailing ';' is unreachable, but alert is squelched } if (x) { return y; } else { return z; }; // ';' is unreachable, but alert is squelched } // test for unreachable throws function z() { return 10; throw new Error(); // this throws is unreachable, but alert should not be produced }