custom_calyptia: fix using after freed memory(#8530) #8790

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	12m 34s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	12m 13s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	12m 9s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	11m 38s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	11m 57s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	12m 34s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	12m 9s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	11m 58s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	12m 34s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	11m 52s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	43m 21s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	11m 36s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	13m 1s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	11m 37s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	12m 1s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	10m 32s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	10m 46s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	12m 0s
Unit tests (matrix)	1s
	4h 6m 33s

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