Haskell IO and closing files

Question

When I open a file for reading in Haskell, I\'ve found that I can\'t use the contents of the file after closing it. For example, this program will print the contents of a file:<

Answer 1

If you want to keep your IO lazy, but to do it safely so that errors such as this don't occur, use a package designed for this such as safe-lazy-io. (However, safe-lazy-io doesn't support bytestring I/O.)