var golang.org/x/mod/zip.errNotRegular

3 uses

	golang.org/x/mod/zip (current package)
		zip.go#L175: 	errNotRegular    = errors.New("not a regular file")
		zip.go#L293: 			addError(p, true, errNotRegular)
		zip.go#L762: 			omitted = append(omitted, FileError{Path: slashPath, Err: errNotRegular})