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The following commit(s) were added to refs/heads/master by this push: new 330635e [SYSTEMML-2296] Fix MNC sparsity estimator for unary operations 330635e is described below commit 330635e7f42dcd0036b7d1b529be530607f4dc81 Author: Matthias Boehm <mboe...@gmail.com> AuthorDate: Fri Apr 5 21:56:24 2019 +0200 [SYSTEMML-2296] Fix MNC sparsity estimator for unary operations --- .../java/org/apache/sysml/hops/estim/EstimatorMatrixHistogram.java | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/main/java/org/apache/sysml/hops/estim/EstimatorMatrixHistogram.java b/src/main/java/org/apache/sysml/hops/estim/EstimatorMatrixHistogram.java index b079a7e..ac324f4 100644 --- a/src/main/java/org/apache/sysml/hops/estim/EstimatorMatrixHistogram.java +++ b/src/main/java/org/apache/sysml/hops/estim/EstimatorMatrixHistogram.java @@ -72,7 +72,8 @@ public class EstimatorMatrixHistogram extends SparsityEstimator } //sketch propagation for intermediates other than final result - h2.setData(root.getRight().isLeaf() ? root.getRight().getData() : null); + if( h2 != null && root.getRight() != null ) + h2.setData(root.getRight().isLeaf() ? root.getRight().getData() : null); MatrixHistogram outMap = MatrixHistogram .deriveOutputHistogram(h1, h2, ret, root.getOp(), root.getMisc()); root.setSynopsis(outMap);