#0  0xb76edb1c in __kernel_vsyscall ()
#1  0xb74ca827 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#2  0xb74cdc53 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#3  0xb74c3977 in __assert_fail_base (fmt=0xb7601b94 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x80492dc "mir_connection_is_valid(mcd.connection)", file=file@entry=0x80492a0 "/build/buildd/mir-0.3.0+14.10.20140618.1/examples/basic.c", line=line@entry=109, function=function@entry=0x804aa90 "demo_client") at assert.c:92
  [Error: assert.c was not found in source tree]
#4  0xb74c3a27 in __GI___assert_fail (assertion=0x80492dc "mir_connection_is_valid(mcd.connection)", file=0x80492a0 "/build/buildd/mir-0.3.0+14.10.20140618.1/examples/basic.c", line=109, function=0x804aa90 "demo_client") at assert.c:101
  [Error: assert.c was not found in source tree]
#5  0x08049105 in demo_client ()
#6  0x08048b4d in main ()