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-rw-r--r--src/main/scala/firrtl/analyses/Netlist.scala1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/main/scala/firrtl/analyses/Netlist.scala b/src/main/scala/firrtl/analyses/Netlist.scala
index f00e96bb..4e211d8b 100644
--- a/src/main/scala/firrtl/analyses/Netlist.scala
+++ b/src/main/scala/firrtl/analyses/Netlist.scala
@@ -47,6 +47,7 @@ class InstanceGraph(c: Circuit) {
for (child <- childInstances(current.module)) {
if (!instanceGraph.contains(child)) {
instanceQueue.enqueue(child)
+ instanceGraph.addVertex(child)
}
instanceGraph.addEdge(current,child)
}