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-rw-r--r--src/main/scala/firrtl/transforms/ConstantPropagation.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/scala/firrtl/transforms/ConstantPropagation.scala b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
index 0ec4fe0b..c3c615e0 100644
--- a/src/main/scala/firrtl/transforms/ConstantPropagation.scala
+++ b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
@@ -819,7 +819,7 @@ class ConstantPropagation extends Transform with DependencyAPIMigration with Res
}
// Map from module name to component names
val dontTouchMap: Map[OfModule, Set[String]] =
- dontTouches.groupBy(_._1).mapValues(_.map(_._2).toSet)
+ dontTouches.groupBy(_._1).mapValues(_.map(_._2).toSet).toMap
state.copy(circuit = run(state.circuit, dontTouchMap))
}