With all that said, despite being published in a licensed Star Wars magazine, this story is probably not considered canon by anyone. This, of course, does not matter at all. The story is awesome and you should read it. Is it the official fate of Han Solo and Chewbacca? No, probably not. Is it awesome? Extremely. Its also sort of depressing, so be prepared for that.
From Star Wars Tales #19
The Great Unknown
By W. Haden Blackman and Sean Murphy