Fix #14741 fuzzing crash (null-pointer-use) in SymbolicConditionHandl… #20384

Job	Run time
build_make (ubuntu:24.04)	3m 6s
build_cmake (ubuntu:25.10, true, true)	5m 20s
build_make (ubuntu:25.10)	2m 48s
build_make (alpine:3.23)	4m 21s
build_cmake (ubuntu:24.04, true, true)	2m 57s
build_cmake (alpine:3.23, false, false)	4m 48s
	23m 20s

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