Running examples in 'treeplyr-Ex.R' failed
The error most likely occurred in:

> ### Name: group_by_.treedata
> ### Title: Function for grouping an object of class 'treedata'
> ### Aliases: group_by_.treedata group_by.treedata ungroup.grouped_treedata
> 
> ### ** Examples
> 
> data(anolis)
> td <- make.treedata(anolis$phy, anolis$dat)
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
Warning in type.convert.default(apply(data[, x, drop = FALSE], 1, as.character)) :
  'as.is' should be specified by the caller; using TRUE
> tdGrouped <- group_by(td, ecomorph)
Warning: `group_by_()` is deprecated as of dplyr 0.7.0.
Please use `group_by()` instead.
See vignette('programming') for more help
This warning is displayed once every 8 hours.
Call `lifecycle::last_warnings()` to see where this warning was generated.
Error: `vars` must be a character vector.
Backtrace:
    x
 1. +-dplyr::group_by(td, ecomorph)
 2. \-dplyr:::group_by.default(td, ecomorph)
 3.   +-dplyr::group_by_(.data, .dots = compat_as_lazy_dots(...), add = add)
 4.   \-treeplyr:::group_by_.treedata(...)
 5.     \-dplyr::grouped_df(groups$data, groups$groups)
Execution halted