Another nullptr-arithmetics clamer #984

Job	Run time
Build and test cmake:gcc9	38s
Build and test cmake:clang15	40s
Build and test cmake:clang:asan	46s
Build and test cmake:clang:tsan	53s
Build and test cmake:clang:ubsan	54s
Build and test cmake:qemu-arm-neon-gcc	59s
Build and test cmake-osx:clang	21s
Build and test cmake-osx:gcc	24s
Build and test cmake-win64:msvc-rel	56s
Build and test cmake-win64:msvc-dbg	48s
Build and test fuzz:clang	32s
Build and test python3.10:clang	1m 46s
Build and test python3.10-win	1m 4s
Build and test maven	30s
Build and test bazel:root	1m 5s
Build and test bazel:go	1m 3s
Build and test bazel:java	2m 8s
Build and test bazel:research	23s
Build and test bazel-osx:root	1m 0s
Build and test bazel-osx:go	1m 6s
Build and test bazel-osx:java	2m 22s
Build and test bazel-osx:research	46s
Build and test bazel-win:root	2m 0s
Build and test bazel-win:java	2m 4s
Build and test bazel-win:research	2m 7s
	27m 15s

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