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

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/scala/firrtl/Visitor.scala b/src/main/scala/firrtl/Visitor.scala
index d0173774..c45d7f56 100644
--- a/src/main/scala/firrtl/Visitor.scala
+++ b/src/main/scala/firrtl/Visitor.scala
@@ -93,7 +93,7 @@ class Visitor(infoMode: InfoMode) extends FIRRTLBaseVisitor[FirrtlNode] {
       case (null, str, null, null) => StringParam(name, visitStringLit(str))
       case (null, null, dbl, null) => DoubleParam(name, dbl.getText.toDouble)
       case (null, null, null, raw) => RawStringParam(name, raw.getText.tail.init) // Remove "\'"s
-      case _ => throwInternalError(Some(s"visiting impossible parameter ${ctx.getText}"))
+      case _ => throwInternalError(s"visiting impossible parameter ${ctx.getText}")
     }
   }