[datatable-help] Bug when Merging with nomatch=0 and roll=T?

[Michael Smith]

I got the following result on my keyed data tables `CS` and `SP`, which
seems like a bug (in 1.9.2 and 1.9.3 dev version) to me, since all
columns should have the _same_ length:

> ## Works as expected:
> all((l <- sapply(CS[SP, roll = TRUE], length)) == l[1])
[1] TRUE
> ## Works as expected:
> all((l <- sapply(CS[SP, nomatch = 0], length)) == l[1])
[1] TRUE
> ## Here's the potential _bug_, when combining both:
> all((l <- sapply(CS[SP, nomatch = 0, roll = TRUE], length)) == l[1])
[1] FALSE


Thanks,

M