Recovery code. #287

Job	Run time
multiple-arch-armv7	23m 29s
cygwin64-cache	4m 48s
utest-regression-blackbox-test	6m 28s
multiple-arch-aarch64	32m 3s
cygwin64	20m 30s
fast	1s
build-ubuntu16	4m 35s
build-ubuntu20	5m 20s
build-cross-aarch64	8m 40s
build-centos7	7m 14s
build-cross-arm	7m 36s
build-ubuntu18	3m 54s
coverage	4m 13s
multiple-arch-amd64	3m 15s
test-done	0s
	2h 12m 6s

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