Fix for <> to BlackBox.IO with Compatibility Bundles (#2801) (#2803)

MonoConnect.traceFlow now properly handles coerced directions.
Also minor improvement to getClassName especially useful in test case printf debugging.

(cherry picked from commit 3aba755bdcf996c0fbd846d13268fd6641b29e96)

Co-authored-by: Megan Wachs <megan@sifive.com>

1 files changed, 15 insertions, 5 deletions

diff --git a/core/src/main/scala/chisel3/Aggregate.scala b/core/src/main/scala/chisel3/Aggregate.scala
index aacf0b1c..4fc9b20f 100644
--- a/core/src/main/scala/chisel3/Aggregate.scala
+++ b/core/src/main/scala/chisel3/Aggregate.scala
@@ -1116,7 +1116,12 @@ abstract class Record(private[chisel3] implicit val compileOptions: CompileOptio
   def elements: SeqMap[String, Data]
 
   /** Name for Pretty Printing */
-  def className: String = this.getClass.getSimpleName
+  def className: String = try {
+    this.getClass.getSimpleName
+  } catch {
+    // This happens if your class is defined in an object and is anonymous
+    case e: java.lang.InternalError if e.getMessage == "Malformed class name" => this.getClass.toString
+  }
 
   private[chisel3] override def typeEquivalent(that: Data): Boolean = that match {
     case that: Record =>
@@ -1243,10 +1248,15 @@ abstract class Bundle(implicit compileOptions: CompileOptions) extends Record wi
       "Please see https://github.com/chipsalliance/chisel3#build-your-own-chisel-projects."
   )
 
-  override def className: String = this.getClass.getSimpleName match {
-    case name if name.startsWith("$anon$") => "AnonymousBundle" // fallback for anonymous Bundle case
-    case ""                                => "AnonymousBundle" // ditto, but on other platforms
-    case name                              => name
+  override def className: String = try {
+    this.getClass.getSimpleName match {
+      case name if name.startsWith("$anon$") => "AnonymousBundle" // fallback for anonymous Bundle case
+      case ""                                => "AnonymousBundle" // ditto, but on other platforms
+      case name                              => name
+    }
+  } catch {
+    // This happens if you have nested objects which your class is defined in
+    case e: java.lang.InternalError if e.getMessage == "Malformed class name" => this.getClass.toString
   }
 
   /** The collection of [[Data]]