Merge pull request #3426 from ControlSystemStudio/info_dialog_fix

Fix potential PV leak

Author: georgweiss

app/display/representation-javafx/src/main/java/org/csstudio/display/builder/representation/javafx/WidgetInfoDialog.java

@@ -658,14 +658,19 @@ private ArchivedStatus getFromArchiver(String pvName) {
         }
         // Prepend "archiver://"
         pvName = "archive://" + pvName + "(" + TimestampFormats.SECONDS_FORMAT.format(Instant.now()) + ")";
+        PV pv = null;
         try {
-            PV pv = PVPool.getPV(pvName);
+            pv = PVPool.getPV(pvName);
             VType pvValue = pv.read();
-            PVPool.releasePV(pv);
             return pvValue == null ? ArchivedStatus.NO : ArchivedStatus.YES;
         } catch (Exception e) {
             return ArchivedStatus.UNKNOWN;
         }
+        finally {
+            if(pv != null){
+                PVPool.releasePV(pv);
+            }
+        }
     }
 
     private enum ArchivedStatus {