Log transform on geom_bar() silently omits layer

[krlmlr]

After some thinking, geom_bar() cannot work with coord_trans(y = "log10") (#420 (comment)). An error message (or a warning) would be great, though.

library(tidyverse, quietly = TRUE)
diamonds %>% ggplot() + geom_bar(aes(x = cut)) + coord_trans(y = "sqrt")

diamonds %>% ggplot() + geom_bar(aes(x = cut)) + coord_trans(y = "log10")

[has2k1]

I think there is a divide-by-zero in there somewhere that leads to infinite coordinate axes.

[hadley]

log(0) becomes -Inf, but this should generate a warning or error somewhere.

[karawoo]

Closed in #2210