Bug in options(datatable.WhenJisSymbolThenCallingScope = T)

[my-R-help]

When setting options(datatable.WhenJisSymbolThenCallingScope = T), it fails to protect special symbols in j. For example:

options(datatable.WhenJisSymbolThenCallingScope = T)
DT <- data.table(a = c(1, 1, 2))
DT[, .N, by = a]

This gives a Null data.table (0 rows and 0 cols), while it should in fact produce the group counts.

[mattdowle]

Ah yes. Thank you. Will fix.