distinct.md
In dplyr: A Grammar of Data Manipulation

distinct errors when selecting an unknown column (#3140)

Code
  df <- tibble(g = c(1, 2), x = c(1, 2))
  (expect_error(df %>% distinct(aa, x)))
Output
  <error/rlang_error>
  Error in `distinct()`:
  ! Must use existing variables.
  x `aa` not found in `.data`.
Code
  (expect_error(df %>% distinct(aa, bb)))
Output
  <error/rlang_error>
  Error in `distinct()`:
  ! Must use existing variables.
  x `aa` not found in `.data`.
  x `bb` not found in `.data`.
Code
  (expect_error(df %>% distinct(.data$aa)))
Output
  <error/rlang_error>
  Error in `distinct()`:
  ! Must use existing variables.
  x `aa` not found in `.data`.
Code
  (expect_error(df %>% distinct(y = a + 1)))
Output
  <error/dplyr:::mutate_error>
  Error in `distinct()`:
  i In argument: `y = a + 1`.
  Caused by error:
  ! object 'a' not found