From 9f77bf54543724594711f0455ef91f51edfbd22e Mon Sep 17 00:00:00 2001
From: Richard Lin
Date: Mon, 1 Apr 2019 14:00:55 -0700
Subject: Detect bundle aliasing (#1050)

---
 src/test/scala/chiselTests/BundleSpec.scala | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src')

diff --git a/src/test/scala/chiselTests/BundleSpec.scala b/src/test/scala/chiselTests/BundleSpec.scala
index 4fc7d7d0..d30b64b3 100644
--- a/src/test/scala/chiselTests/BundleSpec.scala
+++ b/src/test/scala/chiselTests/BundleSpec.scala
@@ -115,4 +115,17 @@ class BundleSpec extends ChiselFlatSpec with BundleSpecUtils {
       }
     }
   }
+
+  "Bundles" should "not have aliased fields" in {
+    (the[ChiselException] thrownBy {
+      elaborate { new Module {
+        val io = IO(Output(new Bundle {
+          val a = UInt(8.W)
+          val b = a
+        }))
+        io.a := 0.U
+        io.b := 1.U
+      } }
+    }).getMessage should include("aliased fields")
+  }
 }
-- 
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