Running examples in ‘extdplyr-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: ind_to_char
> ### Title: Convert indicator data.frame to character/factor.
> ### Aliases: ind_to_char ind_to_char_
> 
> ### ** Examples
> 
> # Supports converting the following atomic types to indicator
> 
> df <- data.frame(integer_ind = c(2L, 0L, 0L, 0L, 0L, 0L),
+                  # non-zero integer is 1, otherwise 0.
+                  logcal_ind = c(FALSE, TRUE, FALSE, FALSE, FALSE, FALSE),
+                  # TRUE is 1.
+                  double_ind = c(0, 0, 2.0, 0, 0, 0),
+                  # non-zero double is 1.
+                  char_ind = c("FALSE", "FALSE", "F", "TRUE", "T", "FALSE"),
+                  # "T" and "TRUE" converts to 1.
+                  factor_ind = factor(c(1, 1, 1, 1, 1, 0), levels = c(0, 1),
+                                      labels = c(TRUE, FALSE)),
+                  # Factors are converted based on levels.
+                  stringsAsFactors = FALSE)
> 
> ind_to_char_(df, col = "new_y", from = names(df), remove = FALSE)
        new_y integer_ind logcal_ind double_ind char_ind factor_ind
1 integer_ind           2      FALSE          0    FALSE      FALSE
2  logcal_ind           0       TRUE          0    FALSE      FALSE
3  double_ind           0      FALSE          2        F      FALSE
4    char_ind           0      FALSE          0     TRUE      FALSE
5    char_ind           0      FALSE          0        T      FALSE
6  factor_ind           0      FALSE          0    FALSE       TRUE
> 
> 
> # ind_to_char as complement to use model.matrix on a factor
> df <- data.frame(x = 1:6, y = factor(c(letters[1:5], NA)))
> ind_df <- as.data.frame(model.matrix(~ x + y - 1,
+                                       model.frame(df, na.action = na.pass)))
> ind_df  # an indicator matrix with NAs
  x ya yb yc yd ye
1 1  1  0  0  0  0
2 2  0  1  0  0  0
3 3  0  0  1  0  0
4 4  0  0  0  1  0
5 5  0  0  0  0  1
6 6 NA NA NA NA NA
> 
> # New character column is generated with non-selected columns kept as is.
> ind_to_char(ind_df, new_y, ya:ye)
Error:
! `select_vars()` was deprecated in dplyr 0.8.4 and is now defunct.
ℹ Please use `tidyselect::vars_select()` instead.
Backtrace:
    ▆
 1. └─extdplyr::ind_to_char(ind_df, new_y, ya:ye)
 2.   └─dplyr::select_vars(colnames(data), ...)
 3.     └─lifecycle::deprecate_stop("0.8.4", "select_vars()", "tidyselect::vars_select()")
 4.       └─lifecycle:::deprecate_stop0(msg)
 5.         └─rlang::cnd_signal(...)
Execution halted