gdm: clear user verifier when finished with it

We only need the user verifier for the purpose of user verification.
Once it's complete we should clear it so it doesn't get in the way
later.

This fixes a bug introduced in commit 3c8c5a557059 that leads to the
user session crashing when the login screen is reactivated.

https://bugzilla.gnome.org/show_bug.cgi?id=753181

diff --git a/js/gdm/authPrompt.js b/js/gdm/authPrompt.js
index 2b79701fc231c6a2490f22164fa4a4c18ae81d90..c30789e2048b92769552830f14ee4b84283bd2e1 100644 (file)
--- a/js/gdm/authPrompt.js
+++ b/js/gdm/authPrompt.js
@@ -489,6 +489,7 @@ const AuthPrompt = new Lang.Class({
 
     finish: function(onComplete) {
         if (!this._userVerifier.hasPendingMessages) {
+            this._userVerifier.clear();
             onComplete();
             return;
         }
@@ -496,6 +497,7 @@ const AuthPrompt = new Lang.Class({
         let signalId = this._userVerifier.connect('no-more-messages',
                                                   Lang.bind(this, function() {
                                                       this._userVerifier.disconnect(signalId);
+                                                      this._userVerifier.clear();
                                                       onComplete();
                                                   }));
     },