Fix #10152 memleak with switch/break #19388

Job	Run time
build_cmake (ubuntu:24.04, true, true)	2m 36s
build_cmake (ubuntu:25.10, true, true)	2m 45s
build_make (alpine:3.23)	5m 53s
build_make (ubuntu:24.04)	3m 12s
build_cmake (alpine:3.23, false, false)	4m 29s
build_make (ubuntu:25.10)	4m 6s
	23m 1s

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