From 6ccff4848fcf55cb1e865738a67f2bec25988ac8 Mon Sep 17 00:00:00 2001
From: Jiuyang Liu
Date: Wed, 26 May 2021 02:35:34 +0800
Subject: throw exception if BitPat width is 0  (#1920)

* spot a bug when BitPat width is 0

* fix #1919

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>---
 src/test/scala/chiselTests/util/BitPatSpec.scala | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/test/scala')

diff --git a/src/test/scala/chiselTests/util/BitPatSpec.scala b/src/test/scala/chiselTests/util/BitPatSpec.scala
index a6c0acf7..ca8dd85c 100644
--- a/src/test/scala/chiselTests/util/BitPatSpec.scala
+++ b/src/test/scala/chiselTests/util/BitPatSpec.scala
@@ -14,4 +14,8 @@ class BitPatSpec extends AnyFlatSpec with Matchers {
     val testPattern = "0" * 32 + "1" * 32 + "?" * 32 + "?01" * 32
     BitPat("b" + testPattern).toString should be (s"BitPat($testPattern)")
   }
+
+  it should "not fail if BitPat width is 0" in {
+    intercept[IllegalArgumentException]{BitPat("b")}
+  }
 }
-- 
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