Comment 0 for bug 1526209

Clients of nested Mir servers silently crash/exit instantly...

This happens in Mir trunk lp:mir and lp:mir/0.18, but not in lp:mir/0.17

  sudo bin/mir_demo_server_minimal -f /tmp/outside &
  sudo bin/mir_proving_server -f /tmp/inside --host-socket=/tmp/outside &
  sudo bin/mir_demo_client_egltriangle -m /tmp/inside

And the client silently exits with return code 139.

Valgrind or gdb show the problem though:

==16515== Process terminating with default action of signal 11 (SIGSEGV)
==16515== Access not within mapped region at address 0x123460A8
==16515== at 0x6EA16E0: XGetXCBConnection (in /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1.0.0)
==16515== by 0x517AC73: ??? (in /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1.0.0)
==16515== by 0x5174ADE: ??? (in /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1.0.0)
==16515== by 0x5174B98: ??? (in /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1.0.0)
==16515== by 0x5170B31: eglInitialize (in /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1.0.0)
==16515== by 0x4031A9: mir_eglapp_init (eglapp.c:350)
==16515== by 0x4024EC: main (egltriangle.c:85)

#0 0x00007ffff5b6e6e0 in XGetXCBConnection ()
   from /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1
#1 0x00007ffff7893c74 in ?? ()
   from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#2 0x00007ffff788dadf in ?? ()
   from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#3 0x00007ffff788db99 in ?? ()
   from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#4 0x00007ffff7889b32 in eglInitialize ()
   from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#5 0x00000000004031aa in mir_eglapp_init (argc=3, argv=0x7fffffffe548,
    width=0x7fffffffdd48, height=0x7fffffffdd4c)
    at /home/dan/bzr/mir/0.18/examples/eglapp.c:350
#6 0x00000000004024ed in main (argc=3, argv=0x7fffffffe548)
    at /home/dan/bzr/mir/0.18/examples/egltriangle.c:85