From b48cdff89ececeb4d667e8349c1cade48e587189 Mon Sep 17 00:00:00 2001
From: Martin Whitaker <icarus@martin-whitaker.me.uk>
Date: Fri, 30 Jul 2021 17:42:16 +0100
Subject: [PATCH] Fix segfault in wildcard port connection with unnamed port
 (issue #530).

A module port list may contain unnamed entries, e.g.

  module dut(a,);

When performing a wildcard connection, these entries should be skipped,
as there is no name to match.

(cherry picked from commit 061121203bc27203b0ea1423cfd031c7381c111f)
---
 elaborate.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/elaborate.cc b/elaborate.cc
index 33ef74ac7..87d253424 100644
--- a/elaborate.cc
+++ b/elaborate.cc
@@ -1200,7 +1200,7 @@ void PGModule::elaborate_mod_(Design*des, Module*rmod, NetScope*scope) const
 		    // Handle wildcard named port
 		  if (pins_[idx].name[0] == '*') {
 			for (unsigned j = 0 ; j < nexp ; j += 1) {
-			      if ((!pins[j]) && (!pins_is_explicitly_not_connected[j])) {
+			      if (rmod->ports[j] && !pins[j] && !pins_is_explicitly_not_connected[j]) {
 				    pins_fromwc[j] = true;
 				    NetNet*       net = 0;
 				    const NetExpr*par = 0;