fortify.grouped_df should have a more informative error message if dplyr is not installed #2822
The current behavior just gives you a very uninformative error message, particularly because it references dplyr when you may not even be using dplyr in your code! e.g. https://travis-ci.org/adamhsparks/theme.usq/builds/414441396#L3184
# remove.packages("dplyr") library(ggplot2) p6 <- ggplot(economics_long) + aes(date, value01, colour = variable) + geom_line() #> Error in loadNamespace(name): there is no package called 'dplyr'
Created on 2018-08-10 by the reprex package (v0.2.0).
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