Avoid issues with ave(). PR#18223, by Thomas Soeiro. #8136

Job	Run time
MacOS (macOS-13)	54m 51s
Linux (gcc, debian:stable, intel)	34m 22s
MacOS (macOS-14)	21m 14s
Windows (check)	49m 56s
Linux (gcc, debian:stable, arm)	45m 18s
Windows (installer)	20m 41s
Linux (gcc, debian:testing, intel)	34m 7s
Linux (gcc, debian:testing, arm)	48m 55s
Linux (clang, debian:stable, intel)	34m 44s
Linux (clang, debian:stable, arm)	46m 14s
Linux (clang, debian:testing, intel)	33m 51s
Linux (clang, debian:testing, arm)	46m 1s
	7h 50m 14s

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