Fix #10152 memleak with switch/break #19387

Job	Run time
build_make (ubuntu:25.10)	2m 7s
build_cmake (ubuntu:25.10, true, true)	1m 28s
build_cmake (ubuntu:24.04, true, true)	1m 33s
build_cmake (alpine:3.23, false, false)	2m 25s
build_make (ubuntu:24.04)	1m 53s
build_make (alpine:3.23)	1m 58s
	11m 24s

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