$ gdb attach 9295
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attach: No such file or directory.
Attaching to process 9295
[New LWP 9298]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
0x00007fba96edd3bd in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib64/libpthread.so.0
(gdb) s
Single stepping until exit from function pthread_cond_wait@@GLIBC_2.3.2,
which has no line number information.

Thread 1 "tkscidb-beta" received signal SIGSEGV, Segmentation fault.
0x00007fba96edcf7c in __condvar_dec_grefs () from /usr/lib64/libpthread.so.0
(gdb) bt
#0  0x00007fba96edcf7c in __condvar_dec_grefs () from /usr/lib64/libpthread.so.0
#1  0x00007fba96edd3e7 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib64/libpthread.so.0
#2  0x00007fba978adbe0 in Tcl_WaitForEvent () from /usr/lib64/libtcl8.6.so
#3  0x00007fba97869f7d in Tcl_DoOneEvent () from /usr/lib64/libtcl8.6.so
#4  0x00007fba984e7112 in Tk_MainLoop () from /usr/lib64/libtk8.6.so
#5  0x00007fba984f5ccb in Tk_MainEx () from /usr/lib64/libtk8.6.so
#6  0x00007fba98c4cc15 in main (argc=3, argv=0x7fffeae389f8) at tkscidb.cpp:110