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/clocklist/ClockList.scala b/src/main/scala/firrtl/passes/clocklist/ClockList.scala
index 073eb050..be4d99fc 100644
--- a/src/main/scala/firrtl/passes/clocklist/ClockList.scala
+++ b/src/main/scala/firrtl/passes/clocklist/ClockList.scala
@@ -44,7 +44,7 @@ class ClockList(top: String, writer: Writer) extends Pass {
     val modulesToInline = (c.modules.collect { case Module(_, n, _, _) if n != top => ModuleName(n, CircuitName(c.main)) }).toSet
     val inlineTransform = new InlineInstances
     val inlinedCircuit = inlineTransform.run(onlyClockCircuit, modulesToInline, Set(), None).circuit
-    val topModule = inlinedCircuit.modules.find(_.name == top).getOrElse(throwInternalError)
+    val topModule = inlinedCircuit.modules.find(_.name == top).getOrElse(throwInternalError(Some("no top module")))
 
     // Build a hashmap of connections to use for getOrigins
     val connects = getConnects(topModule)