Change throwInternalError to use a String instead of Option[String] (#777)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/scala/firrtl/transforms/CheckCombLoops.scala b/src/main/scala/firrtl/transforms/CheckCombLoops.scala
index 6bd62cfa..a4dad11b 100644
--- a/src/main/scala/firrtl/transforms/CheckCombLoops.scala
+++ b/src/main/scala/firrtl/transforms/CheckCombLoops.scala
@@ -63,9 +63,9 @@ class CheckCombLoops extends Transform {
           memport.expr match {
             case memref: WRef =>
               LogicNode(s.name,Some(memref.name),Some(memport.name))
-            case _ => throwInternalError(Some(s"toLogicNode: unrecognized subsubfield expression - $memport"))
+            case _ => throwInternalError(s"toLogicNode: unrecognized subsubfield expression - $memport")
           }
-        case _ => throwInternalError(Some(s"toLogicNode: unrecognized subfield expression - $s"))
+        case _ => throwInternalError(s"toLogicNode: unrecognized subfield expression - $s")
       }
   }