Bug358121 --> nsIMsgMailNewsUrl.folder can throw a JS exception when opening .eml files. This causes things like the phishing detector to not work. sr=bienvenu

mail/base/content/mailWindowOverlay.js

@@ -2539,7 +2539,13 @@ function OnMsgLoaded(aUrl)
     if (!aUrl)
       return;
 
-    var folder = aUrl.folder;
+    // nsIMsgMailNewsUrl.folder throws an error when opening .eml files.
+    var folder;
+    try {
+      folder = aUrl.folder;
+    }
+    catch (ex) {}
+    
     var msgURI = GetLoadedMessage();
     var msgHdr = null;
     

mail/base/content/phishingDetector.js

@@ -57,8 +57,14 @@ function isMsgEmailScam(aUrl)
     return isEmailScam;
 
   // Ignore nntp and RSS messages
-  var folder = aUrl.folder;
-  if (folder.server.type == 'nntp' || folder.server.type == 'rss')
+  // nsIMsgMailNewsUrl.folder can throw an error, especially if we are opening
+  // a .eml message.
+  var folder;
+  try {
+    folder = aUrl.folder;
+  } catch (ex) {}
+  
+  if (folder && (folder.server.type == 'nntp' || folder.server.type == 'rss'))
     return isEmailScam;
 
   // loop through all of the link nodes in the message's DOM, looking for phishing URLs...