Minor fixes

1 files changed, 1 insertions, 1 deletions

diff --git a/grammer.cpp b/grammer.cpp
index 796c099..508d6c5 100644
--- a/grammer.cpp
+++ b/grammer.cpp
@@ -179,7 +179,7 @@ bool Tree::Add(const Token& token, const BNF& bnf, const std::map<std::string, s
 
   std::vector<TreeNode> parent_nodes = getParentTreeNode(bnf, reverseBNF);
   if (parent_nodes.size() == 0)
-   throw std::runtime_error("Couldn't add new parent node for "s + nodes[root].token.type);
+   throw std::runtime_error("Couldn't add new parent node for "s + nodes[root].token.type + "("s + std::to_string(root) + ")"s);
 
   for (const auto &i : parent_nodes) {
    AddRootNode(i);