[99s-extend] couldn't quit in Erlang 17.1

[chaehb]

Hi, everybody.

After Erlang updated to 17.1,
when I run q(). command on erlang console, cowboy couldn't quitted but print series of messages..

(after ok signal printed)

…...
=ERROR REPORT==== 26-Jul-2014::15:23:33 ===
Error in process <0.334.0> on node ‘...my node name...' with exit value: {{case_clause,{error,closed}},[{ranch_acceptor,loop,3,[{file,"src/ranch_acceptor.erl"},{line,28}]}]}
….

Before erlang updated (in 17.0), application could be normally quitted exactly same codes and environments.

This is only appeared when I only use ssl(https).
But when use only http with same dispatch rules, cowboy normally quitted.

What’s wrong? or Normal ?

my environment : 
OS : Mac OS X Mavricks
Erlang/OTP : 17.1 from Homebrew
release tool : relx
Cowboy and others : latest