cp: create failing test for #7455 #6886

Job	Run time
Style/format (ubuntu-latest, feat_os_unix)	14s
Style/lint (windows-latest, feat_os_windows)	2m 42s
Style/toml	10s
Style/lint (macos-latest, feat_os_macos)	35s
Style/lint (ubuntu-latest, feat_os_unix)	35s
Style/spelling (ubuntu-latest, feat_os_unix)	1m 44s
	6m 0s

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