I can't seem to reproduce this bug at will. It boils down to:
# ExFileParse> ("","") == ("","")
#
# Program error: {Show_Bool_showsPrec 0
# INTERNAL ERROR: Error in graph
i.e. (==) applied to args of type (String,String).
# ExFileParse> ([],[]) == (([],[]) :: ([Char],[Char]))
#
# Program error: {Show_Bool_showsPrec 0
# INTERNAL ERROR: Error in graph
# ExFileParse> ("a","a") == ("b","c")
#
# Program error: {Show_Bool_showsPrec 0
# INTERNAL ERROR: Error in graph
whereas
# ExFileParse> ((),()) == ((),())
# True
# ExFileParse> ([],[]) == (([],[]) :: ([Char],[()]))
# True
# ExFileParse> ([1],[1]) == ([1],[1])
# True
# ExFileParse> ("","","") == ("","","")
# True
and (ouch!)
# ExFileParse> if (==) ("","") ("","") then 3 else 5
# 5
but
# ExFileParse> (==) ("","") ("","") || False
#
# Program error: {
# INTERNAL ERROR: Error in graph
--
Fabrice
Hugs 1.4, The Nottingham and Yale Haskell User's System. Version 970719.
Options: --with-x --disable-large-banner --enable-TREX
OS: HP-UX varsovie A.09.05 A 9000/735 2001675185 two-user license
Compiler: gcc version 2.6.3
===============================================================================
Fabrice Lavier <[EMAIL PROTECTED]> (1.514) 345 1644, ext. 317
===============================================================================
