calib3d/imgproc: add GCGraph::maxFlow() missing empty checks

alalek · alalek · commit c6b63e0e2800 · 2020-10-02T05:15:20.000Z
diff --git a/modules/imgproc/src/gcgraph.hpp b/modules/imgproc/src/gcgraph.hpp
@@ -152,6 +152,8 @@ void GCGraph<TWeight>::addTermWeights( int i, TWeight sourceW, TWeight sinkW )
 template <class TWeight>
 TWeight GCGraph<TWeight>::maxFlow()
 {
+    CV_Assert(!vtcs.empty());
+    CV_Assert(!edges.empty());
     const int TERMINAL = -1, ORPHAN = -2;
     Vtx stub, *nilNode = &stub, *first = nilNode, *last = nilNode;
     int curr_ts = 0;

Original file line number	Diff line number	Diff line change
`@@ -152,6 +152,8 @@ void GCGraph<TWeight>::addTermWeights( int i, TWeight sourceW, TWeight sinkW )`
`152`	`152`	`template <class TWeight>`
`153`	`153`	`TWeight GCGraph<TWeight>::maxFlow()`
`154`	`154`	`{`
	`155`	`+ CV_Assert(!vtcs.empty());`
	`156`	`+ CV_Assert(!edges.empty());`
`155`	`157`	`const int TERMINAL = -1, ORPHAN = -2;`
`156`	`158`	`Vtx stub, nilNode = &stub, first = nilNode, *last = nilNode;`
`157`	`159`	`int curr_ts = 0;`