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-rw-r--r--nfa/src/default/regex.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/nfa/src/default/regex.rs b/nfa/src/default/regex.rs
index 9b5fab1..8185ca5 100644
--- a/nfa/src/default/regex.rs
+++ b/nfa/src/default/regex.rs
@@ -558,6 +558,8 @@ impl<T: GraphLabel> DefaultRegex<T> {
builder_mut.append(other.graph);
+ self.types.extend(other.types);
+
if let Some(root) = self.root {
// Deliberately ignore errors here.
let _ = builder_mut.add_edge(root, old_len, ());