On 13 October 2016 at 12:14, Marc-André Lureau
> Commit 949055a2 "char: use a fixed idx for child muxed chr" introduced
> a regression in mux usage, since it wrongly interpreted mux as muxing
> various chr backend. Instead, it muxes frontends.
> The first patch reverts the broken change, the following patches add
> tracking to frontend handler, finally the last patch adds some tests
> that would have helped to track the crash and the regression. There is
> also a small fix for ringbuf.
As discussed on IRC, I have applied patch 1/9 to master to fix
the regression for the moment.