Comment 8 for bug 1837766

I can confirm that this is still an issue. Here is the full back trace.

Thread 1 "kicad" received signal SIGSEGV, Segmentation fault.
PNS::SHOVE::ShoveLines (this=0x0, aCurrentHead=...)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_shove.cpp:1157
1157 m_multiLineMode = false;
(gdb) bt
#0 0x00007fffe0f0891e in PNS::SHOVE::ShoveLines(PNS::LINE const&)
    (this=0x0, aCurrentHead=...)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_shove.cpp:1157
#1 0x00007fffe0ec17c0 in PNS::DRAGGER::dragShove(VECTOR2<int> const&)
    (this=0x581b500, aP=...)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_dragger.cpp:282
#2 0x00007fffe0ec1ca1 in PNS::DRAGGER::Drag(VECTOR2<int> const&)
    (this=0x581b500, aP=...)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_dragger.cpp:362
#3 0x00007fffe0e762f4 in PNS::ROUTER::moveDragging(VECTOR2<int> const&, PNS::ITEM*) (this=0x57c0f10, aP=..., aEndItem=0x589e210)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_router.cpp:253
#4 0x00007fffe0e75f57 in PNS::ROUTER::Move(VECTOR2<int> const&, PNS::ITEM*)
    (this=0x57c0f10, aP=..., endItem=0x589e210)
    at /home/wayne/src/kicad-trunk/pcbnew/router/pns_router.cpp:240
#5 0x00007fffe0e90150 in ROUTER_TOOL::InlineDrag(TOOL_EVENT const&) (this=
    0x20e9550, aEvent=...)
    at /home/wayne/src/kicad-trunk/pcbnew/router/router_tool.cpp:1184
#6 0x00007fffe0e955b9 in std::__invoke_impl<int, int (ROUTER_TOOL::*&)(TOOL_EVENT const&), ROUTER_TOOL*&, TOOL_EVENT const&>(std::__invoke_memfun_deref, int (ROUTER_TOOL::*&)(TOOL_EVENT const&), ROUTER_TOOL*&, TOOL_EVENT const&) (__f=
    @0x5496be0: (int (ROUTER_TOOL::*)(ROUTER_TOOL * const, const TOOL_EVENT &)) 0x7fffe0e8f8d0 <ROUTER_TOOL::InlineDrag(TOOL_EVENT const&)>, __t=@0x5496bf0: 0x20e9550, __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:73
#7 0x00007fffe0e954b7 in std::__invoke<int (ROUTER_TOOL::*&)(TOOL_EVENT const&), ROUTER_TOOL*&, TOOL_EVENT const&>(int (ROUTER_TOOL::*&)(TOOL_EVENT const&), ROUTER_TOOL*&, TOOL_EVENT const&) (__fn=
    @0x5496be0: (int (ROUTER_TOOL::*)(ROUTER_TOOL * const, const TOOL_EVENT &)) 0x7fffe0e8f8d0 <ROUTER_TOOL::InlineDrag(TOOL_EVENT const&)>, __args=@0x5496bf0: 0x20e9550, __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:95
#8 0x00007fffe0e95468 in std::_Bind<int (ROUTER_TOOL::*(ROUTER_TOOL*, std::_Placeholder<1>))(TOOL_EVENT const&)>::__call<int, TOOL_EVENT const&, 0ul, 1ul>(std::tuple<TOOL_EVENT const&>&&, std::_Index_tuple<0ul, 1ul>)
    (this=0x5496be0, __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/function--Type <RET> for more, q to quit, c to continue without paging--
al:400
#9 0x00007fffe0e953cd in std::_Bind<int (ROUTER_TOOL::*(ROUTER_TOOL*, std::_Placeholder<1>))(TOOL_EVENT const&)>::operator()<TOOL_EVENT const&, int>(TOOL_EVENT const&) (this=0x5496be0, __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/functional:482
#10 0x00007fffe0e95092 in std::_Function_handler<int (TOOL_EVENT const&), std::_Bind<int (ROUTER_TOOL::*(ROUTER_TOOL*, std::_Placeholder<1>))(TOOL_EVENT const&)> >::_M_invoke(std::_Any_data const&, TOOL_EVENT const&)
    (__functor=..., __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_function.h:282
#11 0x00007fffe10dc368 in std::function<int (TOOL_EVENT const&)>::operator()(TOOL_EVENT const&) const (this=0x52fcf28, __args=...)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_function.h:687
#12 0x00007fffe10dc1cd in COROUTINE<int, TOOL_EVENT const&>::callerStub(long)
    (aData=47586032)
    at /home/wayne/src/kicad-trunk/include/tool/coroutine.h:335
#13 0x00000000005911b1 in make_fcontext ()
    at /home/wayne/src/kicad-trunk/include/math/box2.h:198
#14 0x0000000000000000 in ()