From 00446479a02bacebec7c63ae2dd7b551e8b0130e Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Tue, 5 Apr 2016 15:00:12 +0100
Subject: Unregister frame when postMessage fails.

---
 background_scripts/main.coffee | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'background_scripts')

diff --git a/background_scripts/main.coffee b/background_scripts/main.coffee
index addbf514..62e32539 100644
--- a/background_scripts/main.coffee
+++ b/background_scripts/main.coffee
@@ -357,7 +357,11 @@ HintCoordinator =
 
   sendMessage: (messageType, tabId, request = {}) ->
     extend request, {handler: "linkHintsMessage", messageType}
-    port.postMessage request for own _, port of @tabState[tabId].ports
+    for own frameId, port of @tabState[tabId].ports
+      try
+        port.postMessage request
+      catch
+        @unregisterFrame tabId, frameId
 
   prepareToActivateMode: (tabId, originatingFrameId, {modeIndex}) ->
     @tabState[tabId] = {frameIds: frameIdsForTab[tabId][..], hintDescriptors: [], originatingFrameId, modeIndex}
-- 
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