Hi,
A few bugs in one here, if you take a look at Data.Char, protectEsc,
you'll find the definition
protectEsc p f = f . cont
where cont s@(c:_) | p c = "\\&" ++ s
cont s = s
Note the second equation of cont is not in a group with the first!
This function gives an error on the empty list, despite what you might
think!
So bug 1 is that we have bad libraries. Bug 2 is that the compiler
doesn't beep there when it should, I guess this is shared nhc code.
Interestingly, Catch was able to spot this bug pretty easily, as soon
as it got a program that tickled those bits of the library.
Thanks
Neil
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