Actually, I have reported it on Github issue, which is now replicated.
Session info
Session info --------------------------------------------------------------------------------------------------
setting value
version R version 3.4.3 (2017-11-30)
system x86_64, mingw32
ui RStudio (1.1.383)
language (EN)
collate Chinese (Simplified)_China.936
tz Asia/Taipei
date 2017-12-15
Packages ------------------------------------------------------------------------------------------------------
package * version date source
base * 3.4.3 2017-12-06 local
compiler 3.4.3 2017-12-06 local
datasets * 3.4.3 2017-12-06 local
devtools 1.13.4 2017-11-09 CRAN (R 3.4.3)
digest 0.6.12 2017-01-27 CRAN (R 3.4.1)
graphics * 3.4.3 2017-12-06 local
grDevices * 3.4.3 2017-12-06 local
memoise 1.1.0 2017-04-21 CRAN (R 3.4.3)
methods * 3.4.3 2017-12-06 local
stats * 3.4.3 2017-12-06 local
tools 3.4.3 2017-12-06 local
utils * 3.4.3 2017-12-06 local
withr 2.1.0 2017-11-01 CRAN (R 3.4.2)
yaml 2.1.16 2017-12-12 CRAN (R 3.4.3)