From 9fa9a9d95a0c040c71b6a756d3ff059518c5929f Mon Sep 17 00:00:00 2001
From: Martin Whitaker <icarus@martin-whitaker.me.uk>
Date: Sun, 3 Jan 2021 12:56:04 +0000
Subject: [PATCH] Protect against infinite recursion in NetScope::find_class().

---
 net_scope.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net_scope.cc b/net_scope.cc
index a25b16a81..5940edbdf 100644
--- a/net_scope.cc
+++ b/net_scope.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2020 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 2000-2021 Stephen Williams (steve@icarus.com)
  * Copyright (c) 2016 CERN Michele Castellana (michele.castellana@cern.ch)
  *
  *    This source code is free software; you can redistribute it
@@ -740,7 +740,7 @@ netclass_t*NetScope::find_class(const Design*des, perm_string name)
 	    return up_->find_class(des, name);
 
 	// Try the compilation unit.
-      if (unit_ != 0)
+      if (unit_ != 0 && this != unit_)
 	    return unit_->find_class(des, name);
 
 	// Nowhere left to try...