Created attachment 1270707 [details]
all thread backtrace

Description of problem:
As subject.

Version-Release number of selected component (if applicable):
virt-viewer-5.0-2.el7.x86_64
gtk-vnc2-0.7.0-1.el7.x86_64


How reproducible:
100%

Steps to Reproduce:
# remote-viewer vnc://www.baidu.com:5901
[1]    17633 segmentation fault (core dumped)  remote-viewer vnc://www.baidu.com:5901

Backtrace:
(gdb) bt full
#0  0x00007fb5e4cf5b59 in vnc_connection_coroutine (conn=0x55afc41d8610 [VncConnection]) at vncconnection.c:5469
        enumerator = 0x55afc403fd00
        sock = 0x0
        priv = 0x55afc41d4a70
        addr = <optimized out>
        sockaddr = 0x0
        conn_error = 0x0
        conn = 0x55afc41d8610 [VncConnection]
        priv = <optimized out>
        s = 
            {conn = 0x0, caller = 0x0, signum = 0, params = {cursor = 0x0, absPointer = 0, text = 0x0, ledstate = 0, area = {x = 0, y = 0, width = 0, height = 0}, size = {width = 0, height = 0}, pixelFormat = 0x0, authReason = 0x0, authUnsupported = 0, authCred = 0x0, authTypes = 0x0, message = 0x0}}
#1  0x00007fb5e4cf5b59 in vnc_connection_coroutine (opaque=<optimized out>) at vncconnection.c:5513
        conn = 0x55afc41d8610 [VncConnection]
        priv = <optimized out>
        s = 
            {conn = 0x0, caller = 0x0, signum = 0, params = {cursor = 0x0, absPointer = 0, text = 0x0, ledstate = 0, area = {x = 0, y = 0, width = 0, height = 0}, size = {width = 0, height = 0}, pixelFormat = 0x0, authReason = 0x0, authUnsupported = 0, authCred = 0x0, authTypes = 0x0, message = 0x0}}
#2  0x00007fb5e4cf94eb in coroutine_trampoline (cc=0x55afc41d4aa0) at coroutine_ucontext.c:55
        co = 0x55afc41d4a70
#3  0x00007fb5e14dfd40 in __start_context () at /usr/lib64/libc-2.17.so
#4  0x000055afc41d4e68 in  ()
#5  0x0000000000000000 in  ()



Actual results:
As above

Expected results:
No segment fault

Additional info:
No reproduced on
virt-viewer-2.0-12.el7.x86_64
gtk-vnc2-0.5.2-7.el7.x86_64