Fix memory leak reported by QiAnXinCodeSafe #1224

Job	Run time
cppcheck	4m 31s
code formatting check	1m 19s
min features with gcc	2m 25s
min features with g++	2m 55s
min features with clang	3m 43s
max features with gcc	3m 55s
max features with g++	2m 49s
max features with clang	4m 5s
max features with clang and AddressSanitized	3m 46s
max features with gcc and DEBUG	2m 50s
max features with gcc for 32-bit arch (legacy OS)	2m 49s
max features with g++ for 32-bit arch (legacy OS)	2m 10s
max features with clang for 32-bit arch (legacy OS)	2m 4s
	39m 21s

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