Who Is A Gazlan?

לרפואת שלום בן גילה בתוך שח"י

In the first mishna in Sanhedrin [ד"ה גזילות] Rashi writes that someone who neglects to return a loan is NOT a גזלן.

In Gittin [לו: ד"ה אמור רבנן] Rashi says that one who neglects to return a loan IS a גזלן.

Many achronim wonder how Rashi Hakadosh can say דבר והיפוכו.

I wonder as well.

Think about it.....