Fix expressions leaking internal data

(cherry-picked from 15dcb6)
qgis · Feb 12, 2017 · 343bc8a · 343bc8a
1 parent 7ee5d8a
commit 343bc8a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/core/qgsexpression.cpp b/src/core/qgsexpression.cpp
@@ -3697,6 +3697,11 @@ QgsExpression::QgsExpression( const QgsExpression& other )
 
 QgsExpression& QgsExpression::operator=( const QgsExpression & other )
 {
+  if ( !d->ref.deref() )
+  {
+    delete d;
+  }
+
   d = other.d;
   d->ref.ref();
   return *this;