> combine("a", 1)
Warning: `combine()` is deprecated as of dplyr 1.0.0.
Please use `vctrs::vec_c()` instead.

Error: Can't combine `..1` <character> and `..2` <double>.

> combine(factor("a"), 1L)
Warning: `combine()` is deprecated as of dplyr 1.0.0.
Please use `vctrs::vec_c()` instead.

Error: Can't combine `..1` <factor<127a2>> and `..2` <integer>.

