PASSED R-hub: using R version 4.0.0 Under development (Testing Rtools) (2019-09-30 r77236), x86_64-w64-mingw32 (64-bit) Windows Server 2012, R-devel, Rtools4.0, 32/64 bit (experimental)
PASSED Win-builder: using R Under development (unstable) (2020-01-27 r77730) using platform: x86_64-w64-mingw32 (64-bit)
Warnings/errors gone.
PASSED R-hub: using R version 4.0.0 Under development (Testing Rtools) (2019-09-30 r77236), x86_64-w64-mingw32 (64-bit) Windows Server 2012, R-devel, Rtools4.0, 32/64 bit (experimental)
PASSED Win-builder: using R Under development (unstable) (2020-01-27 r77730) using platform: x86_64-w64-mingw32 (64-bit)