Replacematcherror - catch exceptions and convert to internal error. (#424)

* Catch exceptions and convert to internal error.
We need to update the displayed message to incorporate a line number and text to be used for the issue.

* Cleanup exception handling/throwing.
Re-throw expected (or uncorrectable exceptions).
Provide Utils.getThrowable() to get the first (eldest) or last throwable in the chain.
Update tests to conform to FreeSpec protocol.

* Minor cleanup
Admit we've updated some deprecated ScalaTest methods.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/scala/firrtl/passes/Uniquify.scala b/src/main/scala/firrtl/passes/Uniquify.scala
index 54b94939..661dbf4e 100644
--- a/src/main/scala/firrtl/passes/Uniquify.scala
+++ b/src/main/scala/firrtl/passes/Uniquify.scala
@@ -109,7 +109,7 @@ object Uniquify extends Transform {
     }
     recUniquifyNames(t, namespace) match {
       case tx: BundleType => tx
-      case tx => error("Shouldn't be here")
+      case tx => throwInternalError(Some(s"uniquifyNames: shouldn't be here - $tx"))
     }
   }