Prefetch buffer may not contain all of requested data if EOF is hit #4301

Job	Run time
build-linux-cmake-mingw	11m 46s
check-format-and-targets	24s
build-linux-cmake-with-benchmark	19m 7s
build-linux	16m 37s
build-linux-cmake-with-folly	27m 4s
build-linux-cmake-with-folly-coroutines	31m 3s
build-linux-cmake-with-folly-lite-no-test	7m 32s
build-linux-encrypted_env-no_compression	15m 47s
build-linux-make-with-folly	28m 13s
build-linux-make-with-folly-lite-no-test	9m 53s
build-linux-release	14m 0s
build-examples	10m 38s
build-fuzzers	9m 8s
build-linux-clang10-asan	17m 8s
build-linux-clang10-clang-analyze	17m 58s
build-linux-clang10-ubsan	16m 54s
build-linux-clang13-mini-tsan	21m 40s
build-linux-clang-13-no_test_run	7m 37s
build-linux-clang-no_test_run	12m 24s
build-linux-gcc-10-cxx20-no_test_run	9m 47s
build-linux-gcc-11-no_test_run	10m 35s
build-linux-gcc-8-no_test_run	8m 41s
build-linux-mini-crashtest	28m 48s
build-linux-unity-and-headers	12m 24s
build-linux-release-rtti	12m 3s
build-linux-arm	13m 15s
build-linux-java	15m 34s
build-linux-java-pmd	11m 32s
build-linux-java-static	11m 11s
build-macos	32m 5s
build-linux-static_lib-alt_namespace-status_checked	18m 30s
build-macos-cmake (true)	35m 26s
build-macos-cmake (false)	57m 40s
build-macos-java	14m 43s
build-macos-java-static	20m 22s
build-macos-java-static-universal	25m 8s
build-windows-vs2019	52m 51s
	11h 25m 28s

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