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Thread 1 (Thread 18154):
#0  0x00007f910194eba5 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f91019526b0 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00007f9101947a71 in __assert_fail () from /lib/libc.so.6
No symbol table info available.
#3  0x00007f9102487454 in ?? () from /usr/lib/libX11.so.6
No symbol table info available.
#4  0x00007f91024879b0 in _XReply () from /usr/lib/libX11.so.6
No symbol table info available.
#5  0x00007f910247b333 in XSync () from /usr/lib/libX11.so.6
No symbol table info available.
#6  0x00007f9102459e98 in XCloseDisplay () from /usr/lib/libX11.so.6
No symbol table info available.
#7  0x0000000000402a61 in ?? ()
No symbol table info available.
#8  0x00007f9101939d8e in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#9  0x00000000004019b9 in ?? ()
No symbol table info available.
#10 0x00007fffb2b00338 in ?? ()
No symbol table info available.
#11 0x000000000000001c in ?? ()
No symbol table info available.
#12 0x0000000000000002 in ?? ()
No symbol table info available.
#13 0x00007fffb2b01de0 in ?? ()
No symbol table info available.
#14 0x00007fffb2b01deb in ?? ()
No symbol table info available.
#15 0x0000000000000000 in ?? ()
No symbol table info available.