From 4e69b50bb34a023d0116315170b2de55c3ecf98f Mon Sep 17 00:00:00 2001
From: Ben Lubar <ben.lubar@gmail.com>
Date: Fri, 14 Feb 2020 17:38:31 -0600
Subject: [PATCH] fix use-after-free in memview

---
 plugins/devel/memview.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/devel/memview.cpp b/plugins/devel/memview.cpp
index e809734f2..769fe9086 100644
--- a/plugins/devel/memview.cpp
+++ b/plugins/devel/memview.cpp
@@ -217,7 +217,8 @@ DFhackCExport command_result plugin_shutdown (color_ostream &out)
 {
     mymutex->lock();
     Deinit();
-    delete mymutex;
     mymutex->unlock();
+    delete mymutex;
+    mymutex = nullptr;
     return CR_OK;
 }