fix(library/simplifier/simplifier): bug in cache_lookup
fix(library/simplifier/simplifier): bug in cache_lookup

fpvandoorn/lean2,Kha/lean,fgdorais/lean,fpvandoorn/lean,fgdorais/lean,leanprover/lean,fpvandoorn/lean2,soonhokong/lean-osx,leanprover-community/lean,johoelzl/lean,rlewis1988/lean,leanprover/lean,leodemoura/lean,soonhokong/lean,leanprover-community/lean,avigad/lean,dselsam/lean,avigad/lean,soonhokong/lean-osx,leanprover/lean,rlewis1988/lean,javra/lean,UlrikBuchholtz/lean,javra/lean,digama0/lean,fpvandoorn/lean2,levnach/lean,javra/lean,UlrikBuchholtz/lean,dselsam/lean,leanprover/lean,levnach/lean,leodemoura/lean,leodemoura/lean,levnach/lean,avigad/lean,soonhokong/lean,rlewis1988/lean,fgdorais/lean,fgdorais/lean,digama0/lean,johoelzl/lean,avigad/lean,soonhokong/lean-windows,javra/lean,leanprover-community/lean,digama0/lean,UlrikBuchholtz/lean,johoelzl/lean,leodemoura/lean,Kha/lean,Kha/lean,fpvandoorn/lean2,avigad/lean,avigad/lean,digama0/lean,soonhokong/lean-windows,fgdorais/lean,soonhokong/lean-windows,leodemoura/lean,UlrikBuchholtz/lean,soonhokong/lean,rlewis1988/lean,soonhokong/lean,fpvandoorn/lean,fpvandoorn/lean,johoelzl/lean,UlrikBuchholtz/lean,dselsam/lean,fpvandoorn/lean,Kha/lean,fpvandoorn/lean,leanprover/lean,Kha/lean,rlewis1988/lean,leanprover-community/lean,soonhokong/lean-osx,javra/lean,soonhokong/lean-osx,leanprover-community/lean,levnach/lean,digama0/lean,fgdorais/lean,fpvandoorn/lean,dselsam/lean,rlewis1988/lean,johoelzl/lean,leanprover-community/lean,johoelzl/lean,leodemoura/lean,dselsam/lean,Kha/lean,leanprover/lean,soonhokong/lean-windows,fpvandoorn/lean2,soonhokong/lean-windows,soonhokong/lean,digama0/lean,soonhokong/lean-osx,levnach/lean,dselsam/lean