geom_ribbon() now errors when ymin and ymax aesthetics are set rather than mapped

[paleolimbot]

This was identified in the revdep checks (#3303), as it breaks a plot in bayesAB. This error was introduced on purpose (#3235). It's worth noting that the behaviour of layers when all the required aesthetics are set and not mapped is undefined and not consistent between geometries. See #3303 (comment) , #3235 (comment) , and #3303 (comment) .

library(ggplot2)
ggplot() + 
  geom_ribbon(x = 1:5, ymin = 0, ymax = 1:5, data = data.frame(1:5)) +
  geom_blank(aes(x = 1:5, y = 1:5))
#> Error: Either ymin or ymax must be given as an aesthetic.

Whereas in 3.1.1:

library(ggplot2)
ggplot() + 
  geom_ribbon(x = 1:5, ymin = 0, ymax = 1:5, data = data.frame(1:5)) +
  geom_blank(aes(x = 1:5, y = 1:5))

[clauswilke]

Per @thomasp85 (#3303 (comment)), we should contact the bayesAB authors to fix their code.

@paleolimbot Could you do that?

[paleolimbot]

Done! FrankPortman/bayesAB#33

[clauswilke]

Thanks!

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