From 8f787a3e411399a0bb106509a85c35ff71c1be06 Mon Sep 17 00:00:00 2001
From: Monica Kozbial <kozbial@google.com>
Date: Mon, 13 Jan 2020 10:32:22 -0800
Subject: [PATCH] Re-rendering block in setMutator. (#3574)

---
 core/block_svg.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/block_svg.js b/core/block_svg.js
index 1d1d57835..338db0d15 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -1123,6 +1123,11 @@ Blockly.BlockSvg.prototype.setMutator = function(mutator) {
     this.mutator = mutator;
     mutator.createIcon();
   }
+  if (this.rendered) {
+    this.render();
+    // Adding or removing a mutator icon will cause the block to change shape.
+    this.bumpNeighbours();
+  }
 };
 
 /**