Comment 6 for bug 1529820

Spent a day trying to reproduce - with no success. The solution (as Oleg Bondarev has proposed) could be to use call instead of cast in routers_updated method, but I feel a bit uncomfortable proposing a fix on an issue I didn't face personally.

I'll add a link to a similar issue (fixed by Oleg Bondarev earlier) just for the sake of completeness - https://bugs.launchpad.net/mos/+bug/1481739.