Following up on this after Matt D truffled out the issue -- snprintf was a
*bit* of a red herring.
The root of the issue is the use of positional identifiers (like %1$d, see
https://stackoverflow.com/questions/19327441/gcc-dollar-sign-in-printf-format-string)
in the format string for translations.
[a bit unsure on if this is maybe better for r-package-devel]
We recently added translations to messages at the R and C level to
data.table.
At the C level, we did _() wrapping for char arrays supplied to the
following functions: error, warning, Rprintf, Error, and snprintf.
This seemed OK but t
