list(.SD$ with 'by' no longer respects group

[malcook]

back in this day, you could count on the following:

R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
...
> library(data.table)
data.table 1.9.2  For help type: help("data.table")
> data.table(mtcars)[,list(n=.N,hplist=list(hp)),by=cyl]
   cyl  n                     hplist
1:   6  7 110,110,110,105,123,123,
2:   4 11       93,62,95,66,52,65,
3:   8 14 175,245,180,180,180,205,

but no longer:

R version 3.1.0 (2014-04-10) -- "Spring Dance"
...
> library(data.table)
data.table 1.9.3  For help type: help("data.table")
> data.table(mtcars)[,list(n=.N,hplist=list(hp)),by=cyl]
   cyl  n                     hplist
1:   6  7 175,245,180,180,180,205,
2:   4 11 175,245,180,180,180,205,
3:   8 14 175,245,180,180,180,205,

## however there is a workaround:
> data.table(mtcars)[,list(n=.N,hplist=list(.SD[,hp])),by=cyl]
   cyl  n                     hplist
1:   6  7 110,110,110,105,123,123,
2:   4 11       93,62,95,66,52,65,
3:   8 14 175,245,180,180,180,205,
> 

This is HUGE change for me. Terrifying actually. Can I expect a fix?

Or is it me?

[arunsrinivasan]

Malcolm, this bug, #481, has already been fixed. Maybe you're behind on v1.9.3? Could you try installing it again?

[malcook]

Arun - indeed - my latest package install was botched - the regression introduced in 1.9.2 now appears fixed at 1.9.3 in my hands - thanks for the insight....