[Qemu-devel] something broken in "v2.7.0-rc1" or just a behavior change?

[Dennis Luehring]

my scenario works with before "v2.7.0-rc1"
git "v2.5.0" OK
git "v2.6.0" OK
git "v2.7.0-rc0" OK
git "v2.7.0-rc1" FAILS

[qemu-git]
build qemu from git at ~2016/08/04

git rev-parse HEAD
09704e6ded83fa0bec14baf32f800f6512156ca0

[scenario]

qemu/sparc64-softmmu/qemu-system-sparc64 --version
QEMU emulator version 2.6.91 (v2.7.0-rc1-46-g09704e6-dirty), Copyright 
(c) 2003-2008 Fabrice Bellard

if i start qemu with (the other platforms are equaly started)

qemu/sparc64-softmmu/qemu-system-sparc64 -m 1GB -nographic -monitor 
telnet::4440,server,nowait -serial telnet::3000,server -kernel 
clfskernel-4.5.0 -initrd big_initrd.cpio

qemu prints at first:
QEMU waiting for connection on: disconnected:telnet::3000,server

then i open up a second console and start:
telnet localhost 3000
qemu prints
Trying 127.0.0.1...
Connected to localhost.

on the console where i started qemu it prints another (v2.7.0-rc0 does 
not print this line again):
QEMU waiting for connection on: disconnected:telnet::3000,server

and thats it - nothing more

same happens for mips64-softmmu/qemu-system-mips64, 
ppc64-softmmu/qemu-system-ppc64 and alpha-softmmu/qemu-system-alpha
something broken or a behavior change?