div {
a: global x;
b: global y;
f-a: arg;
f-b: global y;
f-a: local x changed by foo;
f-b: global y changed by foo;
f-c: new local z;
a: global x;
b: global y changed by foo; }
div {
a: global x;
b: global y;
f-a: arg;
f-b: global y;
f-a: local x changed by foo;
f-b: global y changed by foo;
f-c: new local z;
a: global x;
b: global y changed by foo; }