Use a careful analysis of dependencies in restricting instances to solve the following kind of code broken by being less restrictive on projecting:
Use a careful analysis of dependencies in restricting instances to
solve the following kind of code broken by being less restrictive on
projecting:

Set Printing Existential Instances.
Parameter f : forall x, x=0 -> x=0 -> x=1 /\ x=2.
Parameter g : forall y, y=0 /\ y=0.
Check match g _ with conj a b => f _ a b end.
(* and the return clause should not depend on the "_" *)

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@15064 85f007b7-540e-0410-9357-904b9bb8a0f7

maximedenes/coq,william-lawvere/coq,mlasson/coq,SkySkimmer/coq,jhjourdan/coq,ejgallego/coq,amintimany/coq,maximedenes/coq,coq/coq,gares/coq,JasonGross/coq,jhjourdan/coq,ale-f/coq,asr/coq,aspiwack/coq,amintimany/coq,pirbo/coq,silene/coq,JasonGross/coq,shindere/coq,8l/coq,pirapira/coq2rust,8l/coq,maximedenes/coq,letouzey/coq-wip,coq/coq,ale-f/coq,coq/coq,barras/coq,aspiwack/coq,mattam82/coq,Zimmi48/coq,ejgallego/coq,Lionel-Rieg/coq,ppedrot/coq,Zimmi48/coq,Matafou/coq,mlasson/coq,JasonGross/coq,ejgallego/coq,letouzey/coq-wip,gares/coq,letouzey/coq-wip,SkySkimmer/coq,jpdeplaix/coq,ale-f/coq,ppedrot/coq,maximedenes/coq,ppedrot/coq,pirapira/coq2rust,SkySkimmer/coq,letouzey/coq-wip,TOSPIO/coq,shindere/coq,jpdeplaix/coq,SkySkimmer/coq,barras/coq,ppedrot/coq,pirbo/coq,pirapira/coq2rust,8l/coq,mattam82/coq,gmalecha/coq,ppedrot/coq,TheTypoMaster/coq,barras/coq,ejgallego/coq,letouzey/coq-wip,gares/coq,jhjourdan/coq,amintimany/coq,Matafou/coq,maximedenes/coq,TheTypoMaster/coq,asr/coq,gmalecha/coq,gares/coq,herbelin/github-coq,TheTypoMaster/coq,gmalecha/coq,Zimmi48/coq,coq/coq,pirbo/coq,mlasson/coq,Lionel-Rieg/coq,william-lawvere/coq,silene/coq,aspiwack/coq,Matafou/coq,TOSPIO/coq,Ptival/coq,william-lawvere/coq,shindere/coq,mattam82/coq,Lionel-Rieg/coq,herbelin/github-coq,TOSPIO/coq,Ptival/coq,silene/coq,asr/coq,JasonGross/coq,jpdeplaix/coq,Zimmi48/coq,herbelin/github-coq,Ptival/coq,gares/coq