fix(frontends/lean/builtin_exprs): missing pattern when lhs is a constant constructor
fix(frontends/lean/builtin_exprs): missing pattern when lhs is a constant constructor

Kha/lean,johoelzl/lean,leanprover-community/lean,rlewis1988/lean,leanprover/lean,Kha/lean,johoelzl/lean,johoelzl/lean,fpvandoorn/lean,digama0/lean,Kha/lean,digama0/lean,leanprover/lean,leanprover/lean,rlewis1988/lean,johoelzl/lean,fpvandoorn/lean,digama0/lean,leanprover-community/lean,leanprover-community/lean,leodemoura/lean,leodemoura/lean,dselsam/lean,leanprover/lean,digama0/lean,leodemoura/lean,rlewis1988/lean,fpvandoorn/lean,leanprover/lean,fpvandoorn/lean,dselsam/lean,Kha/lean,leanprover-community/lean,dselsam/lean,leodemoura/lean,dselsam/lean,avigad/lean,johoelzl/lean,leanprover/lean,avigad/lean,johoelzl/lean,avigad/lean,digama0/lean,leodemoura/lean,dselsam/lean,avigad/lean,rlewis1988/lean,leanprover-community/lean,avigad/lean,fpvandoorn/lean,rlewis1988/lean,Kha/lean,Kha/lean,digama0/lean,rlewis1988/lean,leanprover-community/lean,fpvandoorn/lean,leodemoura/lean,dselsam/lean,avigad/lean