[PropertiesChanged]: allow old data to be gc'd after `_propertiesChan…

…ged`
Polymer · Feb 8, 2018 · 74907b9 · 74907b9
1 parent 5607a2d
commit 74907b9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/mixins/properties-changed.html b/lib/mixins/properties-changed.html
@@ -337,6 +337,7 @@
           const old = this.__dataOld;
           if (this._shouldPropertiesChange(props, changedProps, old)) {
             this.__dataPending = null;
+            this.__dataOld = null;
             this._propertiesChanged(props, changedProps, old);
           }
         }