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Added #3372 to news item. Closes #3372
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mattdowle committed Feb 23, 2019
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8. `dcast.data.table` handles sorting of rows with `NA` in result correctly. Closes [#2202](https://github.com/Rdatatable/data.table/issues/2202). Thanks to @Galileo-Galilei for the report.

9. Sorting and grouping a numeric column containing at most one finite value could return incorrect results, [#3381](https://github.com/Rdatatable/data.table/issues/3381); e.g., `data.table(A=c(-Inf,0,Inf), V=1:3)[,sum(V),by=A]` would treat the 3 rows as one group. This was a regression in 1.12.0 only.
9. Sorting, grouping and finding unique values of a numeric column containing at most one finite value (such as `c(Inf,0,-Inf)`) could return incorrect results, [#3372](https://github.com/Rdatatable/data.table/issues/3372) [#3381](https://github.com/Rdatatable/data.table/issues/3381); e.g., `data.table(A=c(Inf,0,-Inf), V=1:3)[,sum(V),by=A]` would treat the 3 rows as one group. This was a regression in 1.12.0. Thanks to Nicolas Ampuero for reporting.

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