From d2a900d187f7568b3ea18096388c20c633dc1923 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Fri, 2 Oct 2009 19:22:53 -0700
Subject: [PATCH] Fix bug in vector8 operator=

operator= would try to overwrite it self under some circumstances.
This was found with valgrind and using -O0. It works with -O2.
(cherry picked from commit 9ea6604439f4e06d32c80bf187325233d2c487b6)
---
 vvp/vvp_net.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vvp/vvp_net.cc b/vvp/vvp_net.cc
index cdf3cfe67..6fdc1f744 100644
--- a/vvp/vvp_net.cc
+++ b/vvp/vvp_net.cc
@@ -2308,7 +2308,8 @@ vvp_vector8_t::vvp_vector8_t(const vvp_vector4_t&that,
 vvp_vector8_t& vvp_vector8_t::operator= (const vvp_vector8_t&that)
 {
 	// Assign to self.
-      if (size_ > PTR_THRESH && that.size_ > PTR_THRESH && ptr_ == that.ptr_)
+      if (this == &that || (size_ > PTR_THRESH && that.size_ > PTR_THRESH &&
+                            ptr_ == that.ptr_))
 	    return *this;
 
       if (size_ != that.size_) {