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https://issues.apache.org/jira/browse/SYSTEMML-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm closed SYSTEMML-2340.
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Resolution: Fixed
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.2
> 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
> Assignee: Matthias Boehm
> Priority: Major
> Fix For: SystemML 1.2
>
>
> 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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