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nihilist-narwhal
684567cc9a
With the whole sheet selected (Ctrl+A on an empty sheet), Fill Down, Right, Up and Left tried to fill all 17 billion cells and ran out of memory, and Remove Duplicates scanned every row for minutes. Fill Up and Fill Left also took their source row or column before narrowing the selection to the data, so they filled up to row 1,048,576 even when the sheet had data. Whole rows and columns now narrow to the used range before anything else (nothing to do on an empty sheet), Remove Duplicates works on the active cell of an empty sheet, and a fill of more than 5,000,000 cells is refused, as Auto Fill already does.