add missing include (#8646)
diff --git a/src/support/graph_traversal.h b/src/support/graph_traversal.h
index cbe5b3a..c7ad6ef 100644
--- a/src/support/graph_traversal.h
+++ b/src/support/graph_traversal.h
@@ -18,6 +18,7 @@
 #include <functional>
 #include <iterator>
 #include <unordered_set>
+#include <vector>
 
 namespace wasm {