`object not found` if `gghighlight` doesn't directly follow `geom_line`

[Nick Jones]

Hi! First of all, thanks for making this package, it's super useful.

I ran into an issue when trying to include a geom_hline on the same graphic as one that used gghighlight. What I found was that gghighlight had to immediately follow the call to geom_line. To demonstrate:

library(gghighlight)
library(ggplot)

# this works:
g <- ggplot(mtcars) + 
    geom_line(aes(drat, wt, color=as.factor(gear))) + 
    gghighlight(max(wt) > 3)
    geom_hline(yintercept=3)
print(g)

# if we switch the order and draw the `geom_hline` first, we get an error like so:
# Error in mutate_impl(.data, dots) : Evaluation error: object 'wt' not found.
g <- ggplot(mtcars) + 
    geom_line(aes(drat, wt, color=as.factor(gear))) + 
    geom_hline(yintercept=3) + 
    gghighlight(max(wt) > 3)
print(g)

Let me know if you need any more detail, thanks!

[Hiroaki Yutani]

Thanks for reporting, this is a bug and was fixed by #78. Could you consider using the dev version for now?

[Nick Jones]

Thanks for the quick follow-up, can definitely use dev for now!