correct input/output shape
@@ -343,7 +343,7 @@ impl<T:Timestamp> Tracker<T> {
.collect::<Vec<_>>();
// Summary of scope inputs to scope outputs.
- let mut builder_summary = vec![vec![]; builder.shape[0].0];
+ let mut builder_summary = vec![vec![]; builder.shape[0].1];
// Compile summaries from each location to each scope output.
let output_summaries = summarize_outputs::<T>(&builder.nodes, &builder.edges);
