Not ignoring NAs with 64-bit integers and grouped operations?

[go-see]

Problem

When I attempt to find the grouped minima of a 64-bit integer (using na.rm = T), it appears as though data.table is ignores the na.rm = T. This does not happen for other grouped operations on 64-bit integers (e.g., max or sum).

Minimal reproducible example

# Load packages
library(bit64)
library(data.table)
# Create data table
tmp = data.table(x = as.integer64(c(1, 2, NA)), id = 1)
# Grouped min does not work
tmp[, min(x, na.rm = T), by = id]
# Grouped max does work
tmp[, max(x, na.rm = T), by = id]

Output:

> tmp[, min(x, na.rm = T), by = id]
   id   V1
1:  1 <NA>
> # Grouped max does work
> tmp[, max(x, na.rm = T), by = id]
   id V1
1:  1  2

Output of sessionInfo()

R version 3.6.3 (2020-02-29)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Catalina 10.15.4

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] bit64_0.9-7       bit_1.1-14        data.table_1.12.9

loaded via a namespace (and not attached):
[1] compiler_3.6.3 tools_3.6.3   

[MichaelChirico]

Reproduced, and also noting that max() doesn't work for na.rm=FALSE:

tmp[, max(x, na.rm = F), by = id]
#       id    V1
# 1:     1     2