catboost tune_grid not working with task_type = "GPU"

[nsandau]

I'm getting the following error when trying to use tune_grid with GPU enabled for catboost: "Error: rsm on GPU is supported for pairwise modes only".
I have tried setting mtry to 1 or omitting the argument but I still get the error.

[nsandau]

It seems the issue is with the conversion of mtry to a proportion:

treesnip/R/catboost.R

Line 245 in 8a87e8c

if(!is.null(rsm)) {

When omitting or setting mtry = 1 the conversion reassigns rsm to rsm/ncol(x).

It should be a relatively easy fix when mtry_prop becomes a part of dials #20 .

A quick workaround until then is to set mtry = ncol(x)+1.