1 files changed, 2 insertions, 0 deletions
diff --git a/grammer.cpp b/grammer.cpp
index 2379e9a..5557b12 100644
--- a/grammer.cpp
+++ b/grammer.cpp
@@ -230,6 +230,8 @@ bool Compiler::AddRootNode()
    const auto& variants{bnf[type]};
    for (int i = 0; i < variants.size(); i++) {
     const std::vector<std::string> & variant{variants[i]};
+    if (variant.size() == 0)
+     continue; // TODO: Handle case of empty rule (see e.g. C++ "attribute-list")
     if (child_type == variant[0]) {
      if (node_type == "") {
       node_type = type;