Xephyr ends with Segmentation fault

Issue

• Xephyr crashes when launched over ssh X forwarding from windows

  # Xephyr :1
  Xephyr unable to use SHM XImages
  _XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6
  _XSERVTransOpen: transport open failed for inet6/f36asi5:1
  _XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6
  (EE)
  (EE) Backtrace:
  (EE) 0: Xephyr (xorg_backtrace+0x55) [0x5af7b5]
  (EE) 1: Xephyr (0x400000+0x1b3669) [0x5b3669]
  (EE) 2: /lib64/libpthread.so.0 (0x7f5d35cb1000+0xf100) [0x7f5d35cc0100]
  (EE) 3: /lib64/libxcb-xv.so.0 (xcb_xv_query_adaptors_info_iterator+0x0) [0x7f5d3446b050]
  (EE) 4: Xephyr (0x400000+0x310fb) [0x4310fb]
  (EE) 5: Xephyr (0x400000+0x2b34d) [0x42b34d]
  (EE) 6: Xephyr (0x400000+0xaf25b) [0x4af25b]
  (EE) 7: Xephyr (AddScreen+0x71) [0x472971]
  (EE) 8: Xephyr (0x400000+0xaf729) [0x4af729]
  (EE) 9: Xephyr (0x400000+0x7644b) [0x47644b]
  (EE) 10: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x7f5d329f7b15]
  (EE) 11: Xephyr (0x400000+0x2a039) [0x42a039]
  (EE)
  (EE) Segmentation fault at address 0x8
  (EE)
  Fatal server error:
  (EE) Caught signal 11 (Segmentation fault). Server aborting
  (EE)