From 68d6dd7eeef9b58bf992b5188a9aeec2ddb5c388 Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Sat, 7 Mar 2026 09:03:42 -0500
Subject: [PATCH] Internals: Add UASSERT to avoid error fault on sv-tests
 regress-sv_sv_import_hier_fail1_iv

---
 src/V3Tristate.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/V3Tristate.cpp b/src/V3Tristate.cpp
index 74c8b1b34..db6f0ccc7 100644
--- a/src/V3Tristate.cpp
+++ b/src/V3Tristate.cpp
@@ -1961,6 +1961,7 @@ class TristateVisitor final : public TristateBaseVisitor {
 
     void handleNodeVarRef(AstNodeVarRef* nodep) {
         UINFO(9, dbgState() << nodep);
+        UASSERT_OBJ(nodep->varp(), nodep, "Unlinked");
         if (m_graphing) {
             if (nodep->access().isWriteOrRW()) associateLogic(nodep, nodep->varp());
             if (nodep->access().isReadOrRW()) associateLogic(nodep->varp(), nodep);