[SYSTEMDS-1151] Improve error message for wrong left indexing inside of for-loops

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: SystemDS 3.3
• Epic Link: Improved Error Reporting
• Assignee: Matthias Boehm
• Reporter: Felix Schueler
• Created: 10/Dec/16 01:42
• Updated: 22/Mar/24 12:06
• Resolved: 22/Mar/24 12:06

Description

When left indexing with an index out of the matrix dimensions inside a for loop, the error message only contains ArrayOutOfBounds information about the matrix block which does not correspond to actual matrix dimenions. This happens only when the left-indexing is inside a for-loop.

To reproduce this, run the two snippets below:

Okay:

A = matrix(2.0, rows=10, cols=10)
A[11,10] = 1.0
print(as.scalar(A[10,10]))

Not Okay:

A = matrix(2.0, rows=10, cols=10)
for (i in 1:10) {
A[11,10] = 1.0
}

print(as.scalar(A[10,10]))