Bug 331007 - alias_in_use doesn't acknowledge that you could remove the alias from the other bug

Bugzilla/Bug.pm

@@ -1445,7 +1445,7 @@ sub _check_alias {
             && (!ref $invocant || $other_bug->id != $invocant->id))
         {
             ThrowUserError("alias_in_use", { alias => $alias,
-                                             bug_id => $other_bug->id });
+                                             other_bug => $other_bug });
         }
     }
 

template/en/default/global/user-error.html.tmpl

@@ -79,13 +79,14 @@
 
   [% ELSIF error == "alias_in_use" %]
     [% title = "Alias In Use" %]
-    [% IF user.can_see_bug(bug_id) %]
-      [% terms.Bug %] [%+ bug_id FILTER bug_link(bug_id) FILTER none %]
+    [% IF user.can_see_bug(other_bug.id) %]
+      [% terms.Bug %] [%+ other_bug.id FILTER bug_link(other_bug.bug_id) FILTER none %]
+      is currently using the alias <em>[% alias FILTER html %]</em>.
+      Please choose another alias[% IF other_bug.check_can_change_field('alias', 0, 1) %] or visit that [% terms.bug %] and change its alias[% END %].
     [% ELSE %]
-      Another [% terms.bug %]
+      The alias <em>[% alias FILTER html %]</em> is already used by another
+      [% terms.bug %] you are not allowed to see. Please choose another alias.
     [% END %]
-    has already taken the alias <em>[% alias FILTER html %]</em>.
-    Please choose another alias.
 
   [% ELSIF error == "alias_is_numeric" %]
     [% title = "Alias Is Numeric" %]