intがoverflowする時にソート順序が入れ替わる

overflow.groovy

int i = 2147483647
def l = [a:i-1, b:i, c:i+1]
assert l == [a:2147483646, b:2147483647, c:-2147483648]
assert l.sort { it.value }*.key == ['c', 'a', 'b']
assert l.collectEntries { [it.key, "lock-" + it.value] }.sort { it.value }*.key == ['c', 'a', 'b']