Resolve "Robust remove() API"

implementing #239 (closed)

src/capture/capture_base.cpp

@@ -315,6 +315,7 @@ void CaptureBase::move(FrameBasePtr _frm_ptr)
 
 void CaptureBase::link(FrameBasePtr _frm_ptr)
 {
+    assert(!is_removing_ && "linking a removed capture");
     assert(this->getFrame() == nullptr && "linking a capture already linked");
 
     if(_frm_ptr)