From a05da1ca082dfca031232ddb845be0b917171ed6 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Mon, 30 Jun 2025 16:24:23 -0700
Subject: [PATCH] Only synth when the R-value is valid

---
 elaborate.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/elaborate.cc b/elaborate.cc
index 321375ffc..ed682b22d 100644
--- a/elaborate.cc
+++ b/elaborate.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2024 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 1998-2025 Stephen Williams (steve@icarus.com)
  * Copyright CERN 2013 / Stephen Williams (steve@icarus.com)
  *
  *    This source code is free software; you can redistribute it
@@ -265,6 +265,7 @@ NetNet *elaborate_unpacked_array(Design *des, NetScope *scope, const LineInfo &l
 		  return nullptr;
 	    } else if (dynamic_cast<PEAssignPattern*> (expr)) {
 		  auto net_expr = elaborate_rval_expr(des, scope, lval->array_type(), expr);
+		  if (! net_expr) return nullptr;
 		  expr_net = net_expr->synthesize(des, scope, net_expr);
 	    } else {
 		  cout << loc.get_fileline() << ": error: Can not assign"