fix: catch potential NPEs #183

Job	Run time
build (ubuntu-20.04, 1.22, amd64)	52s
build (ubuntu-20.04, 1.22, arm64)	52s
build (ubuntu-20.04, 1.22, arm)	1m 18s
build (ubuntu-20.04, 1.22, riscv64)	1m 18s
build (ubuntu-20.04, stable, amd64)	52s
build (ubuntu-20.04, stable, arm64)	50s
build (ubuntu-20.04, stable, arm)	1m 16s
build (ubuntu-20.04, stable, riscv64)	1m 15s
build (ubuntu-22.04, 1.22, amd64)	1m 24s
build (ubuntu-22.04, 1.22, arm64)	42s
build (ubuntu-22.04, 1.22, arm)	41s
build (ubuntu-22.04, 1.22, riscv64)	49s
build (ubuntu-22.04, stable, amd64)	1m 6s
build (ubuntu-22.04, stable, arm64)	1m 14s
build (ubuntu-22.04, stable, arm)	1m 15s
build (ubuntu-22.04, stable, riscv64)	44s
build (ubuntu-latest, 1.22, amd64)	40s
build (ubuntu-latest, 1.22, arm64)	38s
build (ubuntu-latest, 1.22, arm)	41s
build (ubuntu-latest, 1.22, riscv64)	1m 4s
build (ubuntu-latest, stable, amd64)	1m 10s
build (ubuntu-latest, stable, arm64)	47s
build (ubuntu-latest, stable, arm)	48s
build (ubuntu-latest, stable, riscv64)	1m 14s
screenshot	8s
	23m 38s

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