Critical bugs: added #3243 and Gonthier's bug in lazy machine.
Critical bugs: added #3243 and Gonthier's bug in lazy machine.

Both reminded by Enrico.

ejgallego/coq,maximedenes/coq,SkySkimmer/coq,JasonGross/coq,Zimmi48/coq,silene/coq,ppedrot/coq,Matafou/coq,SkySkimmer/coq,maximedenes/coq,ppedrot/coq,ppedrot/coq,Zimmi48/coq,ejgallego/coq,JasonGross/coq,Matafou/coq,ejgallego/coq,SkySkimmer/coq,silene/coq,ppedrot/coq,Zimmi48/coq,gares/coq,gares/coq,silene/coq,maximedenes/coq,maximedenes/coq,Matafou/coq,coq/coq,gares/coq,maximedenes/coq,SkySkimmer/coq,JasonGross/coq,ppedrot/coq,coq/coq,gares/coq,gares/coq,JasonGross/coq,coq/coq,ejgallego/coq,coq/coq,Zimmi48/coq