id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
2542	runghc does not infer module file extensions	judah	simonmar	"In ghc-6.8 (and possibly earlier), `runghc` will infer the extension of a module filename if it is not specified at the command line.  This feature lets us type, for example, {{{runghc Setup configure}}} without worrying whether there's a `Setup.lhs` or `Setup.hs` file present.

For example:
{{{
$ cat Useful.hs 
main = putStrLn ""Hello, world""
$ runghc Useful
Hello, world
}}}

However, this does not work for ghc-6.9.20080824:
{{{
$ ~/tmp/ghc-stage/bin/runghc Useful

<no location info>: can't find file: Useful
$ ~/tmp/ghc-stage/bin/runghc Useful.hs
Hello, world
}}}

"	bug	closed	high	6.10.1	Compiler	6.8.3	fixed			Unknown/Multiple	Unknown/Multiple		Unknown