#0  0x00007f01ec37f117 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]
#1  0x00007f01ec380808 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007f01ec377fc6 in __assert_fail_base (fmt=0x7f01ec4c98b0 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x4039f8 "mir_connection_is_valid(connection)", file=file@entry=0x403908 "/build/buildd/mir-0.6.1+14.10.20140814/examples/scroll.cpp", line=line@entry=141, function=function@entry=0x403b80 <main::__PRETTY_FUNCTION__> "int main(int, char**)") at assert.c:92
  [Error: assert.c was not found in source tree]
#3  0x00007f01ec378072 in __GI___assert_fail (assertion=0x4039f8 "mir_connection_is_valid(connection)", file=0x403908 "/build/buildd/mir-0.6.1+14.10.20140814/examples/scroll.cpp", line=141, function=0x403b80 <main::__PRETTY_FUNCTION__> "int main(int, char**)") at assert.c:101
  [Error: assert.c was not found in source tree]
#4  0x0000000000402e73 in main (argc=<optimized out>, argv=0x7fff46206488) at /build/buildd/mir-0.6.1+14.10.20140814/examples/scroll.cpp:141
  [Error: /build/buildd/mir-0.6.1+14.10.20140814/examples/scroll.cpp was not found in source tree]