-main-is silently failes to create executable when no main is found.

[timothy@timothy main-is]$ cat Foo.hs 
module Foo where
main = print "foooballls"
[timothy@timothy main-is]$ ghc Foo.hs 
[1 of 1] Compiling Foo              ( Foo.hs, Foo.o )
[timothy@timothy main-is]$ ls
Foo.hi  Foo.hs  Foo.o
[timothy@timothy main-is]$ ghc Foo.hs -main-is GeorgeWashington
[timothy@timothy main-is]$ ls
Foo.hi  Foo.hs  Foo.o
[timothy@timothy main-is]$ ghc Foo.hs -main-is Foo
[1 of 1] Compiling Foo              ( Foo.hs, Foo.o )
Linking Foo ...
[timothy@timothy main-is]$ 
There should be a warning when I try to compile with -main-is as GeorgeWashington.  Just for us bad spellers :D

$ ghc -v
Glasgow Haskell Compiler, Version 7.4.2, stage 2 booted by GHC version 7.4.1
--clip--

Trac metadata

Trac field	Value
Version	7.4.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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