Error in bind_rows_(x, .id) : Argument 1 must have names
问题 Here is a code snippet: y <- purrr::map(1:2, ~ c(a=.x)) test1 <- dplyr::bind_rows(y) test2 <- do.call(dplyr::bind_rows, y) The first call to bind_rows ( test1 ) generates the error Error in bind_rows_(x, .id) : Argument 1 must have names Using do.call to invoke bind_rows ( test2 ), on the other hand, works as expected: test2 # A tibble: 2 x 1 a <int> 1 1 2 2 Why? This is using dplyr 0.7.6 and purrr 0.2.5. If I use map_df instead of map , it fails with the same error. Note: It doesn't appear