16 Oct
2010
16 Oct
'10
4:29 a.m.
After it catches this error, the function returns (line 376):
return (fail (show e))
The "fail" is running in the Either monad (The Result type = Either). This calls the default Monad implementation of fail, which is just a call to plain old error. This basically causes the entire program to crash.
Actually, it appears that simpleHTTP isn't actually supposed to throw an IOException, and it is instead supposed to return a ConnError result. So the real fix is to fix the code to make this happen. But
Sounds like a victim of http://hackage.haskell.org/trac/ghc/ticket/4159 For mtl clients, 'fail' for 'Either' used to call 'Left'. That was changed, though the ticket does not indicate the library versions affected. Claus