As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6017 - AFTER TAKEOFF ROTATION, CAUTION MESSAGE "SMOKE TOILET" APPEARED AND FLIGHT ATTENDANT REPORTED SEEING AND DETECTING SMOKE. INSPECTED LAVATORY, BOTH LEFT AND RIGHT PACKS AND DUCT SYSTEM, AND BOTH LEFT AND RIGHT ENGINES. COULD NOT DUPLICATE PROBLEM AT THIS TIME.