[Yhc] Yhc chokes on __ identifer

[Neil Mitchell]

Hi,

C:\Temp>yhc Main.hs -underscore
Compiling Main             ( Main.hs )
yhc: Prelude.head: empty list

Answer: the -underscore flag enables this behaviour, the -underscore
flag is broken, since its a real crash I can debug this pretty easy -
i even have half an idea where its happening.

Anyone want the -underscore flag to stick around, and not just be the
default which can't be turned off?

For that matter:
Compliance Options:
     -underscore    Enable H'98 underscore-is-lower-case (default=off)
     -puns          Enable pre-98 named-field puns (default=on)
     -98            Haskell 98 compliance (default=off)

Why is -98 off, why is -puns on (what are puns!!!) and lets kill this
-underscore option. The n+k option died, others deserve to die too :)

Thanks

Neil