From 554e64401741819ea21db70b0a03636303f60800 Mon Sep 17 00:00:00 2001
From: Neil Fraser <fraser@google.com>
Date: Thu, 15 Mar 2018 17:10:38 -0700
Subject: [PATCH] Don't compute (useless) location of trashcan while workspace
 is being built.

Theoretical performance bump, fixes crash in Opera 12.
---
 core/workspace_svg.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index 0a2af7229..c976749d1 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -1009,7 +1009,7 @@ Blockly.WorkspaceSvg.prototype.createVariable = function(name, opt_type, opt_id)
  * Make a list of all the delete areas for this workspace.
  */
 Blockly.WorkspaceSvg.prototype.recordDeleteAreas = function() {
-  if (this.trashcan) {
+  if (this.trashcan && this.svgGroup_.parentNode) {
     this.deleteAreaTrash_ = this.trashcan.getClientRect();
   } else {
     this.deleteAreaTrash_ = null;