[R-pkg-devel] Error appearing only with check_win_devel() - could be ggplot2 R version?

I think this is temporary and will go away once R-devel is built with
this:
https://github.com/wch/r-source/commit/9542c3215a8f8cfee4a313b6c2fd03320e38e1de

Before that commit (76285), I was getting a different error when I
submitted a package that used ggplot2 (and therefore grid). Now, I'm
getting the same "invalid unit" error that the others have mentioned,
with 76300
on Debian, though not with 76300 Windows.

-Winston