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use std;
import option;
fn foo<T>(y: option<T>) {
let mut x: int;
let mut rs: [int] = [];
/* tests that x doesn't get put in the precondition for the
entire if expression */
if true {
} else { alt y { none::<T> { x = 17; } _ { x = 42; } } rs += [x]; }
ret;
}
fn main() { #debug("hello"); foo::<int>(some::<int>(5)); }
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