Error when loading Hydda overlay in R tmap script

[francisbarton]

I am not sure if this is an error with leaflet, tmap or hydda, but I'm posting it here as a first step!

I have an R script creating maps using tmap that has previously been working fine until recently it has started giving me an error. I have a tmap statement

outlines <- tm_shape(by_ward) + tm_polygons(col = "ward")

which generates a map perfectly well with no errors (by_ward is created from UK OA shapefile data that is grouped according to the variable "ward" using dplyr::group_by and dplyr::summarise).

basic success
If I do:

tmap_options_reset()
outlines

I get my map - but of course with no basemap or overlay.

error
If I do:
tmap_options_reset()
tmap_options(basemaps = leaflet::providers$Hydda.Base,
overlays = leaflet::providers$Hydda.RoadsAndLabels)
outlines

...then I get the error:

Error in mapply(function(a, tmsi) { :
zero-length inputs cannot be mixed with those of non-zero length

non-error variation
If I do:
tmap_options_reset()
tmap_options(basemaps = leaflet::providers$Hydda.Base)
outlines

...I don't get the error. The map renders fine. But I need the overlay! So...

proof of location of error
And if I do:
tmap_options_reset()
tmap_options(basemaps = leaflet::providers$OpenStreetMap.Mapnik,
overlays = leaflet::providers$Hydda.RoadsAndLabels)
outlines

...then I get the mapply error again, same as above.

I have lots of other tmap_options set usually, but I have removed all of them in order to discover which one is causing the error, and it seems to be the Hydda overlays option that causes it.

[francisbarton]

I've decided this is a tmap problem and have filed an issue here instead.