Github user dalaro commented on a diff in the pull request:
https://github.com/apache/incubator-tinkerpop/pull/298#discussion_r61604599
--- Diff:
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/util/star/StarGraph.java
---
@@ -290,7 +288,16 @@ public void dropVertexProperties(final String...
propertyKeys) {
@Override
public Edge addEdge(final String label, final Vertex inVertex,
final Object... keyValues) {
- return this.addOutEdge(label, inVertex, keyValues);
+ final Edge edge = this.addOutEdge(label, inVertex, keyValues);
+ if (inVertex.equals(this)) {
+ List<Edge> inE = inEdges.get(label);
--- End diff --
inEdges may be null here on a pristine StarVertex
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