From 0a98a82c588882eb2905a5564792670c2cfaf858 Mon Sep 17 00:00:00 2001
From: Adam Izraelevitz
Date: Fri, 17 Jan 2020 15:52:57 -0800
Subject: Bugfix: Select.instances now works with blackboxes (#1303)

---
 src/main/scala/chisel3/aop/Select.scala | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'src/main/scala/chisel3/aop/Select.scala')

diff --git a/src/main/scala/chisel3/aop/Select.scala b/src/main/scala/chisel3/aop/Select.scala
index 612cdcc7..390f82a5 100644
--- a/src/main/scala/chisel3/aop/Select.scala
+++ b/src/main/scala/chisel3/aop/Select.scala
@@ -80,8 +80,11 @@ object Select {
     */
   def instances(module: BaseModule): Seq[BaseModule] = {
     check(module)
-    module._component.get.asInstanceOf[DefModule].commands.collect {
-      case i: DefInstance => i.id
+    module._component.get match {
+      case d: DefModule => d.commands.collect {
+        case i: DefInstance => i.id
+      }
+      case other => Nil
     }
   }
 
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