Fixed issue creating std::string from null pointer

1 files changed, 3 insertions, 3 deletions

diff --git a/src/linkedmap.h b/src/linkedmap.h
index 76d906d..3abc069 100644
--- a/src/linkedmap.h
+++ b/src/linkedmap.h
@@ -3,8 +3,8 @@
  * Copyright (C) 1997-2020 by Dimitri van Heesch.
  *
  * Permission to use, copy, modify, and distribute this software and its
- * documentation under the terms of the GNU General Public License is hereby 
- * granted. No representations are made about the suitability of this software 
+ * documentation under the terms of the GNU General Public License is hereby
+ * granted. No representations are made about the suitability of this software
  * for any purpose. It is provided "as is" without express or implied warranty.
  * See the GNU General Public License for more details.
  *
@@ -58,7 +58,7 @@ class LinkedMap
       {
         Ptr ptr = std::make_unique<T>(key,std::forward<Args>(args)...);
         result = ptr.get();
-        m_lookup.insert({std::string(key),result});
+        m_lookup.insert({key ? std::string(key) : std::string(),result});
         m_entries.push_back(std::move(ptr));
       }
       return result;