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-rw-r--r--src/client/model/graph.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/client/model/graph.js b/src/client/model/graph.js
index 5dbba964..b24571e1 100644
--- a/src/client/model/graph.js
+++ b/src/client/model/graph.js
@@ -703,6 +703,9 @@ function Graph(spec) {
link_spec.__src = find_node__by_id(src_id);
link_spec.__dst = find_node__by_id(dst_id);
+ util.assert(undefined !== link_spec.__src, "src_id not found");
+ util.assert(undefined !== link_spec.__dst, "dst_id not found");
+
return link_spec;
}