Fix #14798: internalError on sscanf format string (#8724) #20385

Job	Run time
build_cmake (ubuntu:24.04, true, true)	2m 56s
build_cmake (ubuntu:25.10, true, true)	3m 13s
build_make (ubuntu:24.04)	3m 9s
build_make (ubuntu:25.10)	3m 55s
build_cmake (alpine:3.23, false, false)	4m 27s
build_make (alpine:3.23)	6m 16s
	23m 56s

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