`vec_equal(list(NULL), list(NULL))` returns `TRUE`

[DavisVaughan]

This should return NA right? Unless na_equal = TRUE?

vctrs::vec_equal(list(NULL), list(NULL))
#> [1] TRUE

Problem line:

vctrs/src/equal.c

Line 256 in 673c9f1

case NILSXP:

[hadley]

Right