-name / should match ///

[tavianator]

Repeated slashes for the root directory should match a single slash:

$ ./target/debug/find /// -maxdepth 0 -name /
$ find /// -maxdepth 0 -name /
find: warning: Unix filenames usually don't contain slashes (though pathnames do).  That means that '-name ‘/’' will probably evaluate to false all the time on this system.  You might find the '-wholename' test more useful, or perhaps '-samefile'.  Alternatively, if you are using GNU grep, you could use 'find ... -print0 | grep -FzZ ‘/’'.
///