Bug 300403: New Charts errors out, creates new 'add' user, when Env auth method…

Bugzilla/Auth/Login/WWW/Env.pm

@@ -51,8 +51,12 @@ sub login {
     for ($env_id, $env_email, $env_realname) { $_ ||= '' };
     # make sure the email field contains only a valid email address
     my $emailregexp = Param("emailregexp");
-    $env_email =~ /($emailregexp)/;
+    if ($env_email =~ /($emailregexp)/) {
         $env_email = $1;
+    }
+    else {
+        return undef;
+    }
     # untaint the remaining values
     trick_taint($env_id);
     trick_taint($env_realname);