Merge pull request #1968 from KLayout/bugfix/issue-1967

Bugfix/issue 1967

src/plugins/tools/net_tracer/db_plugin/dbNetTracer.cc

@@ -1454,7 +1454,7 @@ NetTracer::determine_interactions (const db::Polygon &seed, const NetTracerShape
   db::Polygon::area_type poly_area = seed.area_upper_manhattan_bound ();
   db::Polygon::area_type box_area = seed.box ().area ();
 
-  if (poly_area == box_area && seed.vertices () == 4) {
+  if (seed.is_box ()) {
 
     //  The polygon is a box
     determine_interactions (seed.box (), shape, layers, delivery);

src/plugins/tools/net_tracer/unit_tests/dbNetTracerTests.cc

@@ -394,3 +394,15 @@ TEST(9)
   run_test (_this, file, tc, db::LayerProperties (8, 0), db::Point (3000, 6800), file_au, "A");
 }
 
+//  issue #1967
+TEST(10)
+{
+  std::string file = "t10.oas.gz";
+  std::string file_au = "t10_net.oas.gz";
+
+  db::NetTracerConnectivity tc;
+  tc.add (connection ("1", "2"));
+
+  run_test (_this, file, tc, db::LayerProperties (1, 0), db::Point (300000, 7000), file_au, "");
+}
+