Github user mpollmeier commented on a diff in the pull request:

    https://github.com/apache/tinkerpop/pull/838#discussion_r181282267
  
    --- Diff: 
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/RepeatStep.java
 ---
    @@ -273,11 +314,37 @@ public RepeatEndStep(final Traversal.Admin traversal) 
{
                 super(traversal);
             }
     
    +        final LinkedList<Traverser.Admin<S>> stashedStarts = new 
LinkedList<>();
    +
    +        private Traverser.Admin<S> nextStart(RepeatStep<S> repeatStep) {
    +            if (repeatStep.searchAlgo.equals(SearchAlgo.BFS)) {
    +                return this.starts.next();
    +            } else {
    +                if (this.starts.hasNext()) {
    +                    return this.starts.next();
    +                } else {
    +                    return this.stashedStarts.pop();
    +                }
    +            }
    +        }
    +
    +        @Override
    +        public boolean hasNext() {
    +            return super.hasNext() || this.stashedStarts.peek() != null;
    --- End diff --
    
    `this.stashedStarts.isEmpty()`


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