From 710ad582ed3cffeae5f699e47ae8854e564202aa Mon Sep 17 00:00:00 2001
From: Larry Doolittle <ldoolitt@recycle.lbl.gov>
Date: Sat, 28 Mar 2009 12:23:49 -0700
Subject: [PATCH] Make VHDL code generator skip over virtual pins

Fixes pr2701438
(cherry picked from commit a05ac4b5f4baf377b5da5b116344cf23b4e1ad90)
---
 tgt-vhdl/scope.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tgt-vhdl/scope.cc b/tgt-vhdl/scope.cc
index fe45e5722..718a32d99 100644
--- a/tgt-vhdl/scope.cc
+++ b/tgt-vhdl/scope.cc
@@ -952,6 +952,7 @@ static int draw_constant_drivers(ivl_scope_t scope, void *_parent)
               j++) {
             // Make sure the nexus code is generated
             ivl_nexus_t nex = ivl_signal_nex(sig, j);
+            if (!nex) continue;  // skip virtual pins
             seen_nexus(nex);
             
             nexus_private_t *priv =