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function foo(a) {
var y = 0;
for (var i = 0; i < 10; i++) {
var x = a[i];
z = x.f;
if (x.h != null)
y = x.f.g;
}
return y;
}
function foo2(a) {
var y = 0;
for (var i = 0; i < 10; i++) {
var x = a[i];
if (x.f !== undefined) {
if (x.h != null)
y = x.f.g;
}
}
return y;
}
a = [];
for (var i = 0; i < 10; i++)
a[i] = {f:null, h:null};
for (var i = 0; i < 10; i++) {
a[i].f = {g:0};
a[i].h = {};
}
var q = a[0].h;
a[0].f = null;
a[0].h = null;
foo(a);
foo2(a);
a[0].h = q;
try { foo(a); } catch (e) {}
try { foo2(a); } catch (e) {}