library(data.table) fails if "Packaged" field is not present in DESCRIPTION

[restonslacker]

Recently, R seems to no longer add the "Packaged" field to DESCRIPTION when building from source. This prevents an end-user from loading the dev version because of the "staleness" check in onAttach(). However, "Built" is in there (at least on the systems I tested this against). I will submit a that PR attempts to capture that and use it as a substitute. If that fails, it returns since this check is purely informational.

[jangorecki]

Looks like we don't have to try() as read.dcf has an argument fields. Check below

read.dcf(system.file("DESCRIPTION", package="data.table"), fields="Packaged")
read.dcf(system.file("DESCRIPTION", package="data.table"), fields="notexistingfield")
# or even
read.dcf(system.file("DESCRIPTION", package="data.table"), fields=c("Packaged","notexistingfield"))

Then we can handle that with is.na.

[restonslacker]

there is a new commit that removes the call to try()

[arunsrinivasan]

Just ran into this as well. Thanks for the PR @restonslacker. Merged.