feat: leanchecker: print error messages (#548)
feat: leanchecker: print error messages (#548)





digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean