From 985bf3af3b1acb2372a1c8e2d019cbd90193d7fa Mon Sep 17 00:00:00 2001
From: Beka Westberg <bekawestberg@gmail.com>
Date: Wed, 5 Jun 2019 09:53:56 -0700
Subject: [PATCH] Fixed how the trashcan handled shadow blocks. (#2545)

---
 core/trashcan.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/trashcan.js b/core/trashcan.js
index ccee525bc..2eb5cc8b6 100644
--- a/core/trashcan.js
+++ b/core/trashcan.js
@@ -470,7 +470,8 @@ Blockly.Trashcan.prototype.onDelete_ = function() {
     if (trashcan.workspace_.options.maxTrashcanContents <= 0) {
       return;
     }
-    if (event.type == Blockly.Events.BLOCK_DELETE) {
+    if (event.type == Blockly.Events.BLOCK_DELETE &&
+        event.oldXml.tagName.toLowerCase() != 'shadow') {
       var cleanedXML = trashcan.cleanBlockXML_(event.oldXml);
       if (trashcan.contents_.indexOf(cleanedXML) != -1) {
         return;