`port_range` lvar is not defined #1729

Job	Run time
ruby-versions / Generate Ruby versions	5s
test (2.7)	1m 44s
test (3.0)	1m 54s
test (3.1)	1m 54s
test (3.2)	1m 41s
test (3.3)	1m 35s
test (debug)	4m 41s
test (head)	1m 34s
	15m 8s

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