[m-dev.] diff: quantification.m bug fixes

[Thomas Charles CONWAY]

Fergus Henderson, you write:
> 
> Fix a couple of bugs in the handling of implicit quantification
> for variables in lambda goals.
> 
> compiler/quantification.m:
> 	(1) When implicitly-quantifying a lambda goal, the "lambda-outsidevars"
> 	    should be set to the empty set, so that variables occurring
> 	    only inside disjoint lambda goals are locally quantified
> 	    inside those lambda goals. 
> 	(2) When quantifying conjunctions and if-then-elses, use both
> 	    the lambda outsidevars and the ordinary outsidevars when
> 	    computing the non-locals, rather than just using the
> 	    ordinary outsidevars.
> 
> tests/valid/lambda_quant.m:
> 	Add another test case for bug (1).
> 	There was already a tests in this module that was supposed to
> 	test this sort of stuff, but that test case happened to work,
> 	because the effects of bugs (1) and (2) cancelled out. :-(
> 
> tests/valid/Mmake:
> tests/valid/lambda_quant_bug.m:
> 	Add a regression test for bug (2).
> 

This looks fine.
Gosh, quantification is gnarly!

Thomas
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Thomas Conway               				      conway at cs.mu.oz.au
AD DEUM ET VINUM	  			      Every sword has two edges.