fixed ebe68483 for io_context::executor. #166

Job	Run time
posix-cmake-subdir (ubuntu-22.04, OFF, 0)	35s
posix (gcc-11, 2a, ubuntu-22.04)	3m 56s
posix-cmake-subdir (ubuntu-22.04, ON, 0)	44s
posix-cmake-test (ubuntu-22.04, OFF, 0)	3m 32s
posix (gcc-12, 20,2b, ubuntu-22.04, g++-12)	7m 50s
posix-cmake-install (ubuntu-22.04, OFF, 0)	1m 1s
posix-cmake-test (ubuntu-22.04, ON, 0)	3m 48s
posix-cmake-subdir (macos-13, OFF, 1)	1m 8s
posix (gcc-13, 20,2b, ubuntu-latest, ubuntu:23.04, g++-13)	8m 6s
posix-cmake-install (ubuntu-22.04, ON, 0)	43s
posix-cmake-test (macos-13, OFF, 1)	4m 26s
posix-cmake-subdir (macos-13, ON, 1)	1m 26s
posix (clang, clang++-14, 20,2b, libc++, ubuntu-22.04, clang-14 libc++-14-dev)	7m 13s
posix-cmake-install (macos-13, OFF, 1)	1m 41s
posix-cmake-test (macos-13, ON, 1)	4m 34s
posix (clang, 20,2b, macos-13, libc++, boost-container)	11m 37s
posix-cmake-install (macos-13, ON, 1)	1m 25s
windows (msvc-14.3, 20,latest, 32,64, windows-2022)	19m 26s
windows-cmake-install (windows-2022, OFF)	3m 4s
windows-cmake-subdir (windows-2022, OFF)	2m 52s
windows (gcc, 2a, 64, windows-2019)	1m 58s
windows-cmake-test (windows-2022, OFF)	7m 59s
windows-cmake-install (windows-2022, ON)	3m 25s
windows-cmake-test (windows-2022, ON)	8m 52s
	1h 51m 21s

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