Your bug report

#9325: document that "all bets are off if the file contains non-unique join fields"

which was filed against the coreutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 9325@debbugs.gnu.org.

-- 
9325: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9325
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems