diff options
| -rw-r--r-- | src/main/scala/firrtl/graph/DiGraph.scala | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/main/scala/firrtl/graph/DiGraph.scala b/src/main/scala/firrtl/graph/DiGraph.scala index 1d15d505..9cfcad52 100644 --- a/src/main/scala/firrtl/graph/DiGraph.scala +++ b/src/main/scala/firrtl/graph/DiGraph.scala @@ -349,8 +349,8 @@ class DiGraph[T] private[graph] (private[graph] val edges: LinkedHashMap[T, Link * @return a DiGraph[T] containing all vertices and edges of each graph */ def +(that: DiGraph[T]): DiGraph[T] = { - val eprime = edges.clone - that.edges.map({ case (k, v) => eprime.getOrElseUpdate(k, new LinkedHashSet[T]) ++= v }) + val eprime = edges.map({ case (k, v) => (k, v.clone) }) + that.edges.foreach({ case (k, v) => eprime.getOrElseUpdate(k, new LinkedHashSet[T]) ++= v }) new DiGraph(eprime) } } |