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

> ### Name: geom_boxploth
> ### Title: Horizontal box and whiskers plot.
> ### Aliases: geom_boxploth
> 
> ### ** Examples
> 
> library("ggplot2")

Attaching package: 'ggplot2'

The following objects are masked from 'package:ggstance':

    GeomErrorbarh, geom_errorbarh

> 
> # With ggplot2 we need coord_flip():
> ggplot(mpg, aes(class, hwy, fill = factor(cyl))) +
+   geom_boxplot() +
+   coord_flip()
> 
> # With ggstance we use the h-suffixed version:
> ggplot(mpg, aes(hwy, class, fill = factor(cyl))) +
+   geom_boxploth()
> 
> # With facets ggstance horizontal layers are often the only way of
> # having all ggplot features working correctly, for instance free
> # scales:
> df <- data.frame(
+   Group = factor(rep(1:3, each = 4), labels = c("Drug A", "Drug B", "Control")),
+   Subject = factor(rep(1:6, each = 2), labels = c("A", "B", "C", "D", "E", "F")),
+   Result = rnorm(12)
+ )
> 
> ggplot(df, aes(Result, Subject))+
+   geom_boxploth(aes(fill = Group))+
+   facet_grid(Group ~ ., scales = "free_y")
Error in namespaceExport(ns, exports) : 
  undefined exports: %s!=%, %s!==%, %s+%, %s<%, %s<=%, %s==%, %s===%, %s>%, %s>=%, %stri!=%, %stri!==%, %stri+%, %stri<%, %stri<=%, %stri==%, %stri===%, %stri>%, %stri>=%, stri_datetime_add<-, stri_sub<-, stri_subset<-, stri_subset_charclass<-, stri_subset_coll<-, stri_subset_fixed<-, stri_subset_regex<-, stri_c, stri_c_list, stri_cmp, stri_cmp_eq, stri_cmp_equiv, stri_cmp_ge, stri_cmp_gt, stri_cmp_le, stri_cmp_lt, stri_cmp_neq, stri_cmp_nequiv, stri_compare, stri_conv, stri_count, stri_count_boundaries, stri_count_charclass, stri_count_coll, stri_count_fixed, stri_count_regex, stri_count_words, stri_datetime_add, stri_datetime_create, stri_datetime_fields, stri_datetime_format, stri_datetime_fstr, stri_datetime_now, stri_datetime_parse, stri_datetime_symbols, stri_detect, stri_detect_charclass, stri_detect_coll, stri_detect_fixed, stri_detect_regex, stri_dup, stri_duplicated, stri_duplicated_any, stri_enc_detect, stri_enc_detect2, stri_enc_fromutf32, stri_enc_get, stri_enc_inf
Calls: <Anonymous> ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted