Remove extraneous traversal in cloneSupertype (#824)

1 files changed, 2 insertions, 2 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Data.scala b/chiselFrontend/src/main/scala/chisel3/core/Data.scala
index 65f89cc1..e85bee42 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Data.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Data.scala
@@ -108,7 +108,7 @@ private[core] object cloneSupertype {
                                                           compileOptions: CompileOptions): T = {
     require(!elts.isEmpty, s"can't create $createdType with no inputs")
 
-    if (elts forall {_.isInstanceOf[Bits]}) {
+    if (elts.head.isInstanceOf[Bits]) {
       val model: T = elts reduce { (elt1: T, elt2: T) => ((elt1, elt2) match {
         case (elt1: Bool, elt2: Bool) => elt1
         case (elt1: Bool, elt2: UInt) => elt2  // TODO: what happens with zero width UInts?
@@ -130,7 +130,7 @@ private[core] object cloneSupertype {
         }
         case (elt1, elt2) =>
           throw new AssertionError(
-            s"can't create $createdType with heterogeneous Bits types ${elt1.getClass} and ${elt2.getClass}")
+            s"can't create $createdType with heterogeneous types ${elt1.getClass} and ${elt2.getClass}")
       }).asInstanceOf[T] }
       model.cloneTypeFull
     }