/build/kicad-2BBSqv/kicad-5.1.4+dfsg1/eeschema/libedit/block_libedit.cpp(362): assert "Assert failure" failed in HandleBlockEnd().

[sergio]

ASSERT INFO:
/build/kicad-2BBSqv/kicad-5.1.4+dfsg1/eeschema/libedit/block_libedit.cpp(362): assert "Assert failure" failed in HandleBlockEnd().

BACKTRACE:
[1] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[2] wxEvtHandler::SearchDynamicEventTable(wxEvent&)
[3] wxEvtHandler::TryHereOnly(wxEvent&)
[4] wxEvtHandler::ProcessEventLocally(wxEvent&)
[5] wxEvtHandler::ProcessEvent(wxEvent&)
[6] wxEvtHandler::ProcessPendingEvents()
[7] wxAppConsoleBase::ProcessPendingEvents()
[8] wxApp::DoIdle()
[9] g_main_context_dispatch
[10] g_main_loop_run
[11] gtk_main
[12] wxGUIEventLoop::DoRun()
[13] wxEventLoopBase::Run()
[14] wxAppConsoleBase::MainLoop()
[15] wxNavigationEnabled<wxTopLevelWindow>::RemoveChild(wxWindowBase*)
[16] wxEntry(int&, wchar_t**)
[17] wxNavigationEnabled<wxTopLevelWindow>::RemoveChild(wxWindowBase*)
[18] __libc_start_main
[19] _start

kicad 5.1.4+dfsg1-1 debian sid

Steps to reproduce:
Tools -> Edit Schematic Symbols -> Select symbol
Select region with Ctrl-Left_mouse
"An assertion failed" will popup on mouse release.

[sergio (cepxuo)]

I confirm, it's fixed. Thank you!