Hi, thanks for reporting this, fixed in the upcoming 4.02. To avoid the panic with 4.01, compile with -fno-warn-overlapping-patterns. --Sigbjorn Thomas Hallgren <[EMAIL PROTECTED]> writes: > > Hi, > > I enclose a small program that causes ghc 4.01 to say "panic! (the > `impossible' happened)". I also supply the output from ghc -v. > > Regards, > Thomas Hallgren > >
