From 897a7dfc5bc7fac466e578be3e7223b1b6de94f2 Mon Sep 17 00:00:00 2001
From: Greg Spencer <gspencer@google.com>
Date: Fri, 5 Oct 2018 18:16:18 -0700
Subject: [PATCH] Fix a problem with the completer not unregistering the
 listener.

---
 packages/palette_generator/lib/palette_generator.dart | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/palette_generator/lib/palette_generator.dart b/packages/palette_generator/lib/palette_generator.dart
index 77954a6612..72cf0d63e4 100644
--- a/packages/palette_generator/lib/palette_generator.dart
+++ b/packages/palette_generator/lib/palette_generator.dart
@@ -185,6 +185,7 @@ class PaletteGenerator extends Diagnosticable {
     Timer loadFailureTimeout;
     void imageListener(ImageInfo info, bool synchronousCall) {
       loadFailureTimeout?.cancel();
+      stream.removeListener(imageListener);
       imageCompleter.complete(info.image);
     }