can't convert dendrogram object to igraph object then plot as dendrogram with geom_edge_elbow

[wkc1986]

Trying to plot an igraph object that was converted from a dendrogram object with den_to_igraph, with dendrogram layout and geom_edge_elbow gives an error. MWE:

library(ggraph)
library(igraph)

dendro <- as.dendrogram(hclust(dist(iris[-5])))
igraf <- den_to_igraph(dendro)
ggraph(igraf, "dendrogram") + geom_edge_elbow()

gets

Error in eval(expr, envir, enclos) : object 'direction' not found

I would plot the dendrogram object directly, but I want to use tree_apply, which, as I understand, currently only works on igraph objects.

[thomasp85]

Fixed in 36fc2a9