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A general description is here.
‘lapply(<list>, as.data.frame)’ no longer warns falsely for some base vector components.
Communication between parent and child processes in the ‘multicore’ part of ‘parallel’ could fail on platforms that do not support an arbitrarily large payload in system functions ‘read()’/‘write()’ on pipes (seen on macOS where a restriction to ‘INT_MAX’ bytes is documented, without doing a partial read unlike Linux). The payload is now split into 1Gb chunks to avoid that problem. (PR#18571)
Writing to a clipboard connection works again, fixing a regression in R 4.2.0 (PR#18332). Re-using a closed clipboard connection no longer issues a spurious warning about an ignored encoding argument.