Halle Berry faces the same tragic fate as Princess Diana if she moves to France -- so said Gabriel Aubry's attorney in L.A. court ... TMZ has learned.
As we reported, Halle and Gabriel are embroiled in a court battle over whether Halle should be allowed to move to France with the ex-couple's daughter Nahla. Halle believes the kid will be better protected from aggressive paparazzi in France ... thanks to the country's strict anti-pap laws.
But Gabriel's attorney argued Halle and Nahla would be walking right into the lion's den -- because France is the same country where Princess Diana was killed in a wild paparazzi car chase back in 1997.
Halle's lawyer called several French lawyers -- who testified that French judges will nail any photog who goes after a celeb.
Under French laws, paparazzi can't photograph celebrities who don't want their pictures taken -- even if they're out in public.
Photogs who violate the law can be sued for big bucks, and if they harass the celeb they can be criminally prosecuted.
The trial should last for several weeks.