Thread 1 "tkscidb-beta" received signal SIGSEGV, Segmentation fault.
0x00000000082696f6 in app::Cursor::isClipbase (this=0x0) at app_cursor.cpp:112
112     bool Cursor::isClipbase() const         { return m_cursor.isClipbase(); }
(gdb) bt
#0  0x00000000082696f6 in app::Cursor::isClipbase (this=0x0) at app_cursor.cpp:112
#1  0x0000000008253a7e in app::Application::switchBase (this=0x9092d70, cursor=...) at app_application.cpp:1198
#2  0x000000000806d0f1 in cmdSwitch (ti=0x8db4620, objc=3, objv=0x8db9c58) at tcl_database.cpp:3692
#3  0x0000000008055bd9 in safeCall (clientData=0x806d040 <cmdSwitch(ClientData, Tcl_Interp*, int, Tcl_Obj* const*)>, ti=0x8db4620, objc=3, objv=0x8db9c58) at tcl_base.cpp:1006
#4  0x00007ffffe39fe36 in TclNRRunCallbacks () from /usr/lib64/libtcl8.6.so
#5  0x00007ffffe3a1ccc in TclEvalEx () from /usr/lib64/libtcl8.6.so
#6  0x00007ffffe3a2503 in Tcl_EvalEx () from /usr/lib64/libtcl8.6.so
#7  0x00007fffff0da896 in Tk_BindEvent () from /usr/lib64/libtk8.6.so
#8  0x00007fffff0de7ef in TkBindEventProc () from /usr/lib64/libtk8.6.so
#9  0x00007fffff0e66fa in Tk_HandleEvent () from /usr/lib64/libtk8.6.so
#10 0x00007fffff0d8d43 in HandleEventGenerate () from /usr/lib64/libtk8.6.so
#11 0x00007fffff0da0a1 in Tk_EventObjCmd () from /usr/lib64/libtk8.6.so
#12 0x00007ffffe39fe36 in TclNRRunCallbacks () from /usr/lib64/libtcl8.6.so
#13 0x0000000008053e59 in vinvoke(const char *, Tcl_Obj *, typedef __va_list_tag __va_list_tag *) (callee=0x851fb78 <(anonymous namespace)::Node::performReady()::__func__> "performReady", cmd=0x130cbe50, args=0x7ffffffdc1e8) at tcl_base.cpp:604
#14 0x00000000080544a4 in tcl::invoke (callee=0x851fb78 <(anonymous namespace)::Node::performReady()::__func__> "performReady", cmd=0x130cbe50) at tcl_base.cpp:672
#15 0x00000000080db3eb in (anonymous namespace)::Node::performReady (this=0x114df290) at tk_twm.cpp:5029
#16 0x00000000080cba78 in (anonymous namespace)::Node::ready (this=0x114df290) at tk_twm.cpp:1247
#17 0x00000000080dfe34 in cmdLoad (base=..., objc=4, objv=0x8db8f30) at tk_twm.cpp:6027
#18 0x00000000080e3a1a in execute (func=0x80dfc29 <cmdLoad((anonymous namespace)::Base&, int, Tcl_Obj* const*)>, forLoad=true, objc=4, objv=0x8db8f30) at tk_twm.cpp:6748
#19 0x00000000080e3dfc in cmdTwm (ti=0x8db4620, objc=4, objv=0x8db8f30) at tk_twm.cpp:6816
#20 0x0000000008055bd9 in safeCall (clientData=0x80e3a43 <cmdTwm(ClientData, Tcl_Interp*, int, Tcl_Obj* const*)>, ti=0x8db4620, objc=4, objv=0x8db8f30) at tcl_base.cpp:1006
#21 0x00007ffffe39fe36 in TclNRRunCallbacks () from /usr/lib64/libtcl8.6.so
#22 0x00007ffffe3a1ccc in TclEvalEx () from /usr/lib64/libtcl8.6.so
#23 0x00007ffffe45c731 in Tcl_FSEvalFileEx () from /usr/lib64/libtcl8.6.so
#24 0x00007fffff0f5b5b in Tk_MainEx () from /usr/lib64/libtk8.6.so
#25 0x000000000804cd65 in main (argc=2, argv=0x7ffffffde958) at tkscidb.cpp:110