[datatable-help] (1.9.2) data.table crash when assign N values to N<1 rows

[Alan Kwan]

Despite a few minutes of Googling I am unsure of whether this has been
reported, but if it hasn't the following reliably crashes R "seg fault",
on, if it matters, my Linux box

sample=data.table(a=1:50,b='N')
sample[50,b:=c(1,2,3)]

I don't know the guts of data.table to know whether it'd be easy to error
check without sacrificing performance. At the very least maybe some helpful
output?
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