geom_*line() can't handle aesthetic mappings

[cpsievert]

The following produces an empty plot:

df <- data.frame(
    m = c(1, 0, -1),
    b = c(2, -3, 0.1)
  )

  p <- ggplot(df) + xlim(c(-5, 5)) + ylim(c(-5, 5)) + 
    geom_abline(aes(intercept = m, slope = b))
ggplotly(p)

I'll add a fix for this (as well as other problems introduced by changes to ggplot2's internals in #264)

[cpsievert]

Same goes for hline and vline:

p <- ggplot(df) + xlim(c(-5, 5)) + ylim(c(-5, 5)) + 
  geom_hline(aes(yintercept = m, linetype = factor(b)))