From 089fe9ae0f7152c3de67117f03852a6d7acbbe55 Mon Sep 17 00:00:00 2001
From: Todd Strader <todd.strader@gmail.com>
Date: Fri, 27 Mar 2020 13:22:16 -0400
Subject: [PATCH] Check signedness

---
 src/V3Width.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index 2a293de16..2a8e47331 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -3591,7 +3591,9 @@ private:
                 AstNodeDType* typeLhsp = refLhsp->refDTypep();
                 AstNodeDType* typeRhsp = refRhsp->refDTypep();
                 if (AstBasicDType* basicLhsp = VN_CAST(typeLhsp, BasicDType)) {
-                    if (VN_IS(typeRhsp, BasicDType) && basicLhsp->same(typeRhsp)) {
+                    AstBasicDType* basicRhsp = VN_CAST(typeRhsp, BasicDType);
+                    if (basicRhsp && basicLhsp->same(typeRhsp)
+                        && basicLhsp->isSigned() == basicRhsp->isSigned()) {
                         equal = true;
                     }
                 } else if (refLhsp->dtypep() == refRhsp->dtypep()) {