Behaviour in Rhino 6 - (6.0.17255.11421, 12.09.2017)
I don’t get this very easy reproducible crash on shutdown, but another thing.
If I change the texture mapping parameters very often (hold down up/down arrow key in spinner inputs), Rhino crashes after some time (approx. 100 changes)

Before it does, AppDomain.CurrentDomain.FirstChanceException reports this exception.
System.Runtime.InteropServices.SEHException (0x80004005): Eine externe Komponente hat eine Ausnahme ausgelöst.
bei UnsafeNativeMethods.ON_Object_Delete(IntPtr pObject)
bei UnsafeNativeMethods.ON_Object_Delete(IntPtr pObject)
bei Rhino.Runtime.CommonObject.Dispose(Boolean disposing)
bei Rhino.Runtime.CommonObject.Finalize()
How can I send you a crash report? Is it created if I click on close?
Top of the stack trace:
opennurbs.dll!00007ffed12e1f34() Unknown No symbols loaded.
opennurbs.dll!00007ffed12e1a27() Unknown No symbols loaded.
opennurbs.dll!00007ffed12f3999() Unknown No symbols loaded.
RhinoCore.dll!00007ffed1dcf883() Unknown No symbols loaded.
RhinoCore.dll!00007ffed1dce0e9() Unknown No symbols loaded.
RhinoCore.dll!00007ffed1c82f00() Unknown No symbols loaded.
RhinoCore.dll!00007ffed1c8345a() Unknown No symbols loaded.
mscoreei.dll!00007ffee5a85e61() Unknown No symbols loaded.
KernelBase.dll!00007fff01546913() Unknown No symbols loaded.
ntdll.dll!00007fff04d16711() Unknown No symbols loaded.
ntdll.dll!00007fff04ce9010() Unknown No symbols loaded.
ntdll.dll!00007fff04cea07d() Unknown No symbols loaded.
ntdll.dll!00007fff04c59c58() Unknown No symbols loaded.
ntdll.dll!00007fff04ce90fe() Unknown No symbols loaded.
opennurbs.dll!00007ffed15033bd() Unknown No symbols loaded.
RhinoCore.dll!00007ffed28a273c() Unknown No symbols loaded.
RhinoCore.dll!00007ffed289deb9() Unknown No symbols loaded.
RhinoCore.dll!00007ffed28bef9b() Unknown No symbols loaded.
RhinoCore.dll!00007ffed28b6940() Unknown No symbols loaded.
RhinoCore.dll!00007ffed28b817b() Unknown No symbols loaded.
mfc140u.dll!_AfxDispatchCmdMsg(CCmdTarget * pTarget, unsigned int nID, int pfn, void(CCmdTarget::*)() pExtra, void * nSig, unsigned __int64 pHandlerInfo, AFX_CMDHANDLERINFO *) Line 78 C++ Symbols loaded.
mfc140u.dll!CCmdTarget::OnCmdMsg(unsigned int nID, int nCode, void * pExtra, AFX_CMDHANDLERINFO * pHandlerInfo) Line 372 C++ Symbols loaded.
mfc140u.dll!CWnd::ReflectChildNotify(unsigned int uMsg, unsigned __int64 wParam, __int64 lParam, __int64 * pResult) Line 3474 C++ Symbols loaded.
mfc140u.dll!CWnd::SendChildNotifyLastMsg(int64 * pResult) Line 3389 C++ Symbols loaded.
mfc140u.dll!CWnd::ReflectLastMsg(HWND * hWndChild, __int64 * pResult) Line 3426 C++ Symbols loaded.
mfc140u.dll!CWnd::OnCommand(unsigned __int64 wParam, __int64 lParam) Line 2780 C++ Symbols loaded.
mfc140u.dll!CWnd::OnWndMsg(unsigned int message, unsigned __int64 wParam, __int64 lParam, __int64 * pResult) Line 2107 C++ Symbols loaded.
mfc140u.dll!CWnd::WindowProc(unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 2093 C++ Symbols loaded.
I could net provoke a crash without the Console.Writeline attached to RhinoDoc.TextureMappingEvent. So it might have to do with it.