Regular files are blocking
Fixes #15153, extended version of !7986. CC @nh2 @arybczak
Tracked at https://github.com/haskell/core-libraries-committee/issues/166
Fixes #15153, extended version of !7986. CC @nh2 @arybczak
Tracked at https://github.com/haskell/core-libraries-committee/issues/166