[jira] [Created] (SYSTEMML-2340) Missing indexing hop size reset on negative reconcile after loops

["Matthias Boehm (JIRA)" <ji...@apache.org>]

Matthias Boehm created SYSTEMML-2340:
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             Summary: Missing indexing hop size reset on negative reconcile after loops
                 Key: SYSTEMML-2340
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2340
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


The below script incorrectly returns 100 instead of 98. Although the difference is detected during reconciliation after size propagation through the loop, the indexing hop current does not allow for size reset and thus the correction pass is ineffective here.

{code}
X = rand(rows=100, cols=1);
Y = X
# two loop iterationn -> nrow(X)=98
for( i in seq(1,2,1) ) {
   n1 = nrow(Y) + 0.0;
   Y = Y[2:n1,] - Y[1:n1-1,];
}
print(nrow(Y));
{code}



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