From 9c9bc131b031764332aeb2b175ae8abc500b8801 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Mon, 29 Mar 2021 14:56:22 -0700
Subject: Provide useful message on Vec.apply require (#1838)

---
 core/src/main/scala/chisel3/Aggregate.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'core/src')

diff --git a/core/src/main/scala/chisel3/Aggregate.scala b/core/src/main/scala/chisel3/Aggregate.scala
index c5a917fa..df992bb9 100644
--- a/core/src/main/scala/chisel3/Aggregate.scala
+++ b/core/src/main/scala/chisel3/Aggregate.scala
@@ -342,7 +342,7 @@ object VecInit extends SourceInfoDoc {
     // DummyImplicit or additional type parameter will break some code.
 
     // Check that types are homogeneous.  Width mismatch for Elements is safe.
-    require(!elts.isEmpty)
+    require(elts.nonEmpty, "Vec hardware values are not allowed to be empty")
     elts.foreach(requireIsHardware(_, "vec element"))
 
     val vec = Wire(Vec(elts.length, cloneSupertype(elts, "Vec")))
-- 
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