Fix for #1521

git-svn-id: http://svn.cactuscode.org/flesh/trunk@5082 17b73243-c579-4c4c-a9d2-2d5706c11dac

1 files changed, 3 insertions, 1 deletions

diff --git a/src/piraha/smart_ptr.hpp b/src/piraha/smart_ptr.hpp
index 1d9dcf6f..71e3b4d6 100644
--- a/src/piraha/smart_ptr.hpp
+++ b/src/piraha/smart_ptr.hpp
@@ -135,6 +135,8 @@ class smart_ptr {
     }
     void operator=(const smart_ptr<T>& s) {
         assert(this != NULL);
+        if(guts == s.guts)
+            return;
         clean();
         guts = s.guts;
         if(guts != NULL)
@@ -162,7 +164,7 @@ class smart_ptr {
     bool valid() const {
         return guts != NULL && guts->ptr != NULL;
     }
-    int ref_count() {
+    int ref_count() const {
         assert(guts != NULL);
         return guts->ref_count_();
     }