id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
4058	improve error message: Module `System.IO' does not export `LineBuffering'	simonmar		"`LineBuffering` is a constructor, and `System.IO` definitely does export it.  A more helpful error message might be

{{{
`LineBuffering' is a constructor in the data type `BufferMode`,
  to import it use 
    import System.IO (BufferMode(LineBuffering))
  or
    import System.IO (BufferMode(..))
}}}

(adapted from a suggestion by John Launchbury)
"	feature request	closed	normal	7.0.2	Compiler	6.12.2	fixed		merehap@… michal.terepeta@…	Unknown/Multiple	Unknown/Multiple	None/Unknown	Easy (less than 1 hour)