Scale manual dummy legend not showing icon

[rfgoldberg]

Hello, I found a problem with scale_fill_manual.

When running the following code, I expected a second legend icon to appear for test, but it does not. This issue does not occur with an older version of ggplot (3.4.4), only with 3.5.1.

Reprex below:

library(dplyr)
library(ggplot2)

iris |> 
filter(Species == "setosa")  |> 
ggplot() + 
  geom_boxplot(aes(x = Species, y = Petal.Width,fill = Species)) + 
  scale_fill_manual(values = c("red","blue"), limits = c("setosa","test"), labels = c("setosa","test"))

[teunbrand]

Hi there, thanks for the report! This is an intentional change. You should use geom_boxplot(show.legend = TRUE) if you want to display data that isn't in the plot.