bug#34126: grep v. 3.1 – unexpected error message "grep: i.: No such file or directory"

[Ricky Tigg]

OS: *Fedora*; Component: grep.x86_64  3.1-8.fc29

Commands executed:

$ dnf list|grep -Ei langpack | grep fi.
glibc-langpack-fi.x86_64            2.28-26.fc29         @updates
langpacks-fi.noarch                 1.0-13.fc29          @System
(...)

$ dnf list|grep -Ei langpack | grep fi. | grep "-fi."
grep: i.: No such file or directory

Using grep twice in the same command, the command's last grep is expected
to produce targets, not an STDERR. Probably an issue.