`port_range` lvar is not defined #1731

Job	Run time
ruby-versions / Generate Ruby versions	2s
ruby-versions / Generate Ruby versions	2s
test (2.7)	2m 3s
test (2.7)	1m 46s
test (3.0)	1m 34s
test (3.0)	1m 34s
test (3.1)	1m 54s
test (3.1)	1m 43s
test (3.2)	1m 42s
test (3.2)	1m 42s
test (3.3)	1m 37s
test (3.3)	1m 37s
test (debug)	4m 48s
test (debug)	4m 48s
test (head)	1m 34s
test (head)	1m 34s
	30m 0s

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