michael@0: var re = /a(b)c/;
michael@0: 
michael@0: for (var i = 0; i < 10; i++) {
michael@0:     // These two are of a form where we can convert exec() to test().
michael@0:     if (!re.exec("abc")) print("huh?");
michael@0:     re.exec("abc");
michael@0: }
michael@0: 
michael@0: RegExp.prototype.test = 1;
michael@0: 
michael@0: for (var i = 0; i < 10; i++) {
michael@0:     // These two are the same form, but we've replaced test(), so we must
michael@0:     // not convert.
michael@0:     if (!re.exec("abc")) print("huh?");     // don't crash/assert
michael@0:     re.exec("abc");                         // don't crash/assert
michael@0: }