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fread colClasses=NA_character_ incorrect #4237

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mattdowle opened this issue Feb 11, 2020 · 0 comments
Closed

fread colClasses=NA_character_ incorrect #4237

mattdowle opened this issue Feb 11, 2020 · 0 comments
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bug fread
Milestone
1.13.0

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@mattdowle
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@mattdowle mattdowle commented Feb 11, 2020

Follow up to #1910. Not sure how this lasted so long.

> fread("A,B\n1,3\n2,4\n", colClasses=c(NA_character_, NA_character_))
       A     B      # correct
   <int> <int>
1:     1     3
2:     2     4
> fread("A,B\n1,3\n2,4\n", colClasses=NA_character_)
        A      B    # incorrect
   <char> <char>
1:      1      3
2:      2      4
>

There's a length-1 specific case at C level which doesn't deal with the NA properly when colClasses is length 1.
@mattdowle mattdowle added the bug label Feb 11, 2020
@mattdowle mattdowle added this to the 1.12.9 milestone Feb 11, 2020
@jangorecki jangorecki added the fread label Feb 11, 2020
@mattdowle mattdowle mentioned this issue Feb 11, 2020
Merged
@jangorecki jangorecki modified the milestones: 1.12.11, 1.12.9 May 26, 2020
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fread length-1 colClasses=NA_character_
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