Improve error handling #414

Job	Run time
find_package/linux/Release	2m 49s
find_package/linux/Debug	1m 56s
find_package/linux/libcxx/Release	3m 11s
find_package/linux/libcxx/Debug	2m 14s
find_package/macos/Release	5m 47s
find_package/macos/Debug	4m 23s
find_package/win/Release	3m 50s
find_package/win/Debug	2m 42s
find_library/linux/Release	2m 48s
find_library/linux/Debug	2m 9s
find_library/linux/libcxx/Release	3m 0s
find_library/linux/libcxx/Debug	2m 9s
find_library/macos/Release	5m 54s
find_library/macos/Debug	4m 48s
find_library/win/Release	3m 47s
find_library/win/Debug	2m 39s
singleheader/linux/Release	2m 42s
singleheader/linux/Debug	1m 58s
singleheader/linux/libcxx/Release	3m 8s
singleheader/linux/libcxx/Debug	2m 13s
singleheader/macos/Release	5m 28s
singleheader/macos/Debug	4m 50s
singleheader/win/Release	3m 55s
singleheader/win/Debug	2m 37s
	1h 20m 57s

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