Originally, in "One Thousand and One Nights", Aladdin was merely a random poor schmoe.
However, in one of the most famous adaptations (1940 movie "The Thief of Baghdad") he's now a street thief.
Is there any information on why/how/where this idea of Aladdin as a thief originated?
1. We will leave undiscussed the side issue of whether Aladdin's story was in the original book in Arabic or a separate Arabic folk tale added to the book by French translator.