From 8eb02754af2dbef5b3704d6674e8b7376f07f8a1 Mon Sep 17 00:00:00 2001
From: Morgan Deters <mdeters@cs.nyu.edu>
Date: Mon, 4 Mar 2013 19:58:09 -0500
Subject: [PATCH] Bugfix for SmtEngine: proper unsubscribing for NodeManager
 events

---
 src/smt/smt_engine.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/smt/smt_engine.cpp b/src/smt/smt_engine.cpp
index 09fed4f9f..af02c5186 100644
--- a/src/smt/smt_engine.cpp
+++ b/src/smt/smt_engine.cpp
@@ -365,6 +365,10 @@ public:
     d_smt.d_nodeManager->subscribeEvents(this);
   }
 
+  ~SmtEnginePrivate() {
+    d_smt.d_nodeManager->unsubscribeEvents(this);
+  }
+
   void nmNotifyNewSort(TypeNode tn) {
     DeclareTypeCommand c(tn.getAttribute(expr::VarNameAttr()),
                          0,
-- 
2.30.2