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segfault combining `on=` with `by=.EACHI` and `mult=` #1271

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arunsrinivasan opened this issue Aug 14, 2015 · 0 comments

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arunsrinivasan commented Aug 14, 2015

require(data.table)
set.seed(1L)
dt = data.table(a=c(1,1,2), b=sample(10,3), c=sample(10,3))
#    a b  c
#1: 1 3 10
#2: 1 4  2
#3: 2 5  8

dt[.(a=unique(a)), c := if (c-b > 0L) b, on="a", by=.EACHI] # warning (rightfully so)
dt[.(a=unique(a)), c := if (c-b > 0L) b, on="a", by=.EACHI, mult="first"] # <~~~ segfault
dt[.(a=unique(a)), c := if (c-b > 0L) b, on="a", by=.EACHI, mult="last"] # <~~~ segfault

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by=.EACHI and 'mult="first"/"last" issue #1287

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arunsrinivasan added this to the v1.9.8 milestone

arunsrinivasan self-assigned this

arunsrinivasan closed this as completed in

8cd2077

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