Automatic indexing comparing numeric with character

[gsee]

With auto.index=TRUE, attempting to compare numeric with character in the i expression throws an error.

library(data.table)
#data.table 1.9.5  For help type: ?data.table
#*** NB: by=.EACHI is now explicit. See README to restore previous behaviour.

op <- options(datatable.auto.index=FALSE) # to avoid error and see expected results
DT <- as.data.table(BOD)

DT[Time %in% c("1", "2")]
#   Time demand
#1:    1    8.3
#2:    2   10.3

DT[, Char:=as.character(Time)]
DT[Char %in% 1:2]
#   Time demand Char
#1:    1    8.3    1
#2:    2   10.3    2

options(datatable.auto.index = TRUE)
DT[Time %in% c("1", "2")]
#Error in bmerge(i, x, leftcols, rightcols, io <- FALSE, xo, roll = 0,  :
#  typeof x.Time (double) != typeof i.V1 (character)
DT[Char %in% 1:2]
#Error in bmerge(i, x, leftcols, rightcols, io <- FALSE, xo, roll = 0,  : 
#  x.'Char' is a character column being joined to i.'V1' which is type 'integer'. Character columns must join to factor or character columns.

options(op)