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rbindlist segfault #2019

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rbindlist segfault#2019
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bug
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v1.11.0

Description

@arunsrinivasan
arunsrinivasan
opened on Feb 9, 2017

Commit 2706 segfaults rbindlist when used with idcol argument.

require(data.table)
dt <- setDT(lapply(1:11, function(x) sample(letters, 1e4L, TRUE)))

ll <- lapply(1:3000, function(x) {
  if (runif(1) > 0.5) data.table() else dt[sample(1000L)]
})

# works fine
for (i in 1:50) {
  ans1 <- rbindlist(ll)
}

# segfaults
for (i in 1:50) {
  ans2 <- rbindlist(ll, idcol="id")
}

The current CRAN version segfaults. Narrowed it down to commit 2706.

Activity

  1. arunsrinivasan
    added
    bug
    on Mar 30, 2017

  2. mllg commented on Apr 14, 2017

    @mllg
    mllg
    on Apr 14, 2017
    Contributor

    Here is an example which is easier to reproduce:

    require(data.table)
x <- list(list(a = 1), list(), list(a = 2))
rbindlist(x, idcol = "id")

    This is fixed with #2077, but I'm not sure where to put the test.

  3. mattdowle
    closed this as completedin d250ed5on May 11, 2017
  4. mattdowle
    added this to the milestone on May 11, 2017
  5. mattdowle
    added a commit that references this issue on May 11, 2017

    Test added for the rbindlist segfault that @mllg fixed - many thanks, #…

    03ee346
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