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The example is :
dataset <- data_frame(A = 1:10, B = 10:1, group = factor(sample(LETTERS[25:26], 10, TRUE)))
dataset %>% group_by(group) %>% mutate(prediction = factor(NA))
It results in :
*** caught segfault ***
address 0xfffffffffffffffc, cause 'memory not mapped'
If the table is not grouped, then there is no R crash.
The R session is :
R version 3.2.3 (2015-12-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 15.10
other attached packages:
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