Comment 7 for bug 1822678

I also see a crash with another schematics. Could be different issue though.

There is a dialog with backtrace:

ASSERT INFO:
/data/src/kicad-source-mirror/eeschema/connection_graph.cpp(1047): assert "power_object" failed in buildConnectionGraph().

BACKTRACE:
[1] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[2] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
[3] wxEvtHandler::TryHereOnly(wxEvent&)
[4] wxEvtHandler::DoTryChain(wxEvent&)
[5] wxEvtHandler::ProcessEvent(wxEvent&)
[6] wxWindowBase::TryAfter(wxEvent&)
[7] wxWindowBase::TryAfter(wxEvent&)
[8] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[9] g_closure_invoke
[10] g_signal_emit_valist
[11] g_signal_emit
[12] g_closure_invoke
[13] g_signal_emit_valist
[14] g_signal_emit
[15] g_closure_invoke
[16] g_signal_emit_valist
[17] g_signal_emit
[18] gtk_propagate_event
[19] gtk_main_do_event
[20] g_main_context_dispatch
[21] g_main_loop_run
[22] gtk_main
[23] wxGUIEventLoop::DoRun()
[24] wxEventLoopBase::Run()
[25] wxAppConsoleBase::MainLoop()
[26] wxEntry(int&, wchar_t**)
[27] __libc_start_main
[28] _start

And GDB says:

#0 0x00007fffebe9042f in SCH_PIN_CONNECTION::GetDefaultNetName(SCH_SHEET_PATH) (this=0x0, aPath=...) at /data/src/kicad-source-mirror/eeschema/sch_pin_connection.cpp:53
#1 0x00007fffebd66e0b in CONNECTION_GRAPH::buildConnectionGraph() (this=0x55555691cf00) at /data/src/kicad-source-mirror/eeschema/connection_graph.cpp:1049
#2 0x00007fffebd63ab2 in CONNECTION_GRAPH::Recalculate(SCH_SHEET_LIST, bool) (this=0x55555691cf00, aSheetList=..., aUnconditional=true)
    at /data/src/kicad-source-mirror/eeschema/connection_graph.cpp:305
#3 0x00007fffebec4db3 in SCH_EDIT_FRAME::RecalculateConnections() (this=0x555556897210) at /data/src/kicad-source-mirror/eeschema/sch_edit_frame.cpp:1526
#4 0x00007fffebda14b9 in SCH_EDIT_FRAME::OpenProjectFiles(std::vector<wxString, std::allocator<wxString> > const&, int) (this=0x555556897210, aFileSet=std::vector of length 1, capacity 1 = {...}, aCtl=0) at /data/src/kicad-source-mirror/eeschema/files-io.cpp:378
#5 0x00007fffebec1f43 in SCH_EDIT_FRAME::OnLoadProject(wxCommandEvent&) (this=0x555556897210, event=...) at /data/src/kicad-source-mirror/eeschema/sch_edit_frame.cpp:1079
#6 0x00007ffff67754be in wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#7 0x00007ffff67755c3 in wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#8 0x00007ffff677598b in wxEvtHandler::TryHereOnly(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#9 0x00007fffebffb054 in EDA_BASE_FRAME::ProcessEvent(wxEvent&) (this=0x555556897210, aEvent=...) at /data/src/kicad-source-mirror/common/eda_base_frame.cpp:173
#10 0x00007ffff6775783 in wxEvtHandler::DoTryChain(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#11 0x00007ffff6775a75 in wxEvtHandler::ProcessEvent(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#12 0x00007ffff70a518b in wxWindowBase::TryAfter(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#13 0x00007ffff7ba2458 in wxAuiToolBar::OnLeftUp(wxMouseEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_gtk2u_aui-3.0.so.0
#14 0x00007ffff67754be in wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#15 0x00007ffff67755c3 in wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#16 0x00007ffff677598b in wxEvtHandler::TryHereOnly(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#17 0x00007ffff6775a13 in wxEvtHandler::ProcessEventLocally(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#18 0x00007ffff6775a75 in wxEvtHandler::ProcessEvent(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#19 0x00007ffff67757d7 in wxEvtHandler::SafelyProcessEvent(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#20 0x00007ffff6ee395b in () at /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#21 0x00007ffff513338b in () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#22 0x00007ffff4b0810d in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#23 0x00007ffff4b1b05e in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#24 0x00007ffff4b230af in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#25 0x00007ffff4b2412f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#26 0x00007ffff52492bc in () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#27 0x00007ffff513162c in gtk_propagate_event () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#28 0x00007ffff5131a2b in gtk_main_do_event () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#29 0x00007ffff4da702c in () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#30 0x00007ffff43bd387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007ffff43bd5c0 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ffff43bd8d2 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007ffff5130a37 in gtk_main () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#34 0x00007ffff6ec2b05 in wxGUIEventLoop::DoRun() () at /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#35 0x00007ffff6631a93 in wxEventLoopBase::Run() () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#36 0x00007ffff65f90a6 in wxAppConsoleBase::MainLoop() () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#37 0x0000555555599c1f in APP_SINGLE_TOP::OnRun() (this=0x555555895b30) at /data/src/kicad-source-mirror/common/single_top.cpp:197
#38 0x00007ffff6683ae9 in wxEntry(int&, wchar_t**) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#39 0x0000555555595200 in main(int, char**) (argc=1, argv=0x7fffffffdbd8) at /data/src/kicad-source-mirror/common/single_top.cpp:271