Fix curl resumable epoll related crash #3393

Job	Run time
macos/clang++/c++17	2s
macos/clang++/c++17	10m 50s
macos/clang++/c++17	10m 50s
buster/g++/c++17/asan=off/ubsan=off	1s
buster/g++/c++17/asan=off/ubsan=off	9s
buster/g++/c++17/asan=off/ubsan=off	26m 20s
focal/clang++/c++17/asan=off/ubsan=on	9s
focal/clang++/c++17/asan=off/ubsan=on	1s
focal/clang++/c++17/asan=off/ubsan=on	30m 56s
focal/g++-10/c++20/asan=on/ubsan=off	4s
focal/g++-10/c++20/asan=on/ubsan=off	8s
focal/g++-10/c++20/asan=on/ubsan=off	30m 19s
jammy/g++/c++20/asan=on/ubsan=off	4s
jammy/g++/c++20/asan=on/ubsan=off	4s
jammy/g++/c++20/asan=on/ubsan=off	25m 39s
	2h 15m 36s

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