DoGridDragEvent error

[griderror]

I'm using wxWidgets-3.1.1
My grid:

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grid = new wxGrid(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 0);
grid->CreateGrid(10, 10);

When I select 2 or more cells with left mouse button, press right mouse button and drag I got this error from
void wxGrid::DoGridDragEvent(wxMouseEvent& event, const wxGridCellCoords& coords):

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wxASSERT_MSG( !m_winCapture, "shouldn't capture the mouse twice" );

How to solve this issue? I may or may not want to drag data from cells in the future.

[catalin]

Make sure the mouse is not already captured (even by the same window) when starting a drag.

[griderror]

I'm new to wxWidgets so I don't know how to do it. The problem occurs when I press RMB+drag while still holding LMB. I checked

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void MainFrame::OnGridRightClick(wxGridEvent& event) {
	auto* cw = GetCapture();
	if (cw != nullptr) {
		wxMessageBox(cw->GetName(), "Who has the capture?", wxOK | wxICON_INFORMATION);
	}
}

From this I see that GridWindow has capture. With msgbox there is no assertion failure. I suppose I need to somehow release LMB before RMB click. I tried EVT_GRID_CELL_BEGIN_DRAG but not even msgbox pops up. I also tried grid->GetGridWindow()->ReleaseMouse() on RMB but it didn't work.

[doublemax]

This also happens in the "grid" sample. Please open a bug report at http://trac.wxwidgets.org