Fix undefined newKey in the delete listener (was never a member variable).

addon/content/TbHelper.js

@@ -63,7 +63,6 @@ const TbHelper = {
     // The deletion happens in `OnStopCopy()` of the copy listener for local messages
     // and in `OnStopRunningUrl()` for IMAP messages if the folder is displayed since
     // otherwise `OnStopRunningUrl()` doesn't run.
-    let copyListener;
     const deleteListener = {
       QueryInterface(iid) {
         if (iid.equals(Ci.nsIMsgCopyServiceListener) || iid.equals(Ci.nsISupports)) {
@@ -75,8 +74,8 @@ const TbHelper = {
       OnStopCopy() {
         if (selectNew && win && win.gDBView) {
           // Display the new message.
-          controller.log.info(`Selecting new message with key ${copyListener.newKey}`);
-          win.gDBView.selectMsgByKey(copyListener.newKey);
+          controller.log.info(`Selecting new message with key ${newKey}`);
+          win.gDBView.selectMsgByKey(newKey);
         }
       },
     };
@@ -85,7 +84,7 @@ const TbHelper = {
     let statusCode = 0;
     let deletedOld = false;
 
-    copyListener = {
+    const copyListener = {
       QueryInterface(iid) {
         if (iid.equals(Ci.nsIMsgCopyServiceListener) ||
             iid.equals(Ci.nsIUrlListener) ||