crashing

i put the room 3 in the editor and then when i edit objects the system error:
./src/osx/cocoa/evtloop.mm(131): assert "m_modalNestedLevel == 0" failed in ~wxGUIEventLoop().

Call stack:
[00] EditorObjectProperties::OnSelectPositionClick(wxCommandEvent&)
[01] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
[02] wxEvtHandler:rocessEventLocally(wxEvent&)
[03] wxEvtHandler:rocessEvent(wxEvent&)
[04] wxWindowBase::TryAfter(wxEvent&)
[05] wxEvtHandler:rocessEvent(wxEvent&)
[06] wxWindowBase::TryAfter(wxEvent&)
[07] wxEvtHandler:rocessEvent(wxEvent&)
[08] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[09] wxButton::OSXHandleClicked(double)
[10] _os_activity_initiate
[11] -[NSApplication sendAction:to:from:]
[12] -[NSControl sendAction:to:]
[13] __26-[NSCell _sendActionFrom:]_block_invoke
[14] _os_activity_initiate
[15] -[NSCell _sendActionFrom:]
[16] -[NSButtonCell _sendActionFrom:]
[17] _os_activity_initiate
[18] -[NSCell trackMouse:inRect:ofView:untilMouseUp:]
[19] -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:]
[20] -[NSControl mouseDown:]
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what is it again?

in fact when i try to make a start point this message is coming
the strange thing in it is that i can make start points in the 2 other rooms

Seems hopefully fixed in the developer build.

no, everything is ok , it was my fault, i forget to draw borders on my room....

No, it's our fault, because it never gives crashes.