[project @ 2001-08-24 13:06:36 by simonpj]

[project @ 2001-08-24 13:06:36 by simonpj]
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	Another demand analyser glitch
	------------------------------

This fixes, I hope, (in an unsatisfactory way) another demand-analyser
glitch, that resulted in a runtime "entered absent arg" error.

In DmdAnal.annotateLamIdBndr, we now have:

	-- This gross hack is needed because otherwise we label
	-- a lambda binder with demand 'B'.  But in terms of calling
	-- conventions that's Abs, because we don't pass it.  But
	-- when we do a w/w split we get
	--	fw x = (\x y:B -> ...) x (error "oops")
	-- And then the simplifier things the 'B' is a strict demand
	-- and evaluates the (error "oops").  Sigh

The hack zaps 'B' to 'Abs', just like 'lazify' does.

Need to talk to John about what the principled reasons are.