[R] XGBoost 2 deprecation error

[mayer79]

I am testing the new R package (version 2.2.0.0).

The deprecation warnings give errors for objects like "valids" or "watchlist" that contain external pointers.

library(xgboost)

dtrain <- xgb.DMatrix(iris[2:4], label = iris[, 1])
fit <- xgb.train(
  params = list(), data = dtrain, watchlist = list(train = dtrain), nrounds = 10
)

# Gives (sorry, german...)
Fehler in parse(text = paste(new_par, "<-", pars[[pars_par]])) : 
  <text>:1:10: Unerwartete(s) '<'
1: evals <- <
             ^
Zusätzlich: Warnmeldung:
In check.deprecation(...) : 'watchlist' ist veraltet.
Benutzen Sie stattdessen 'evals'
Siehe help("Deprecated") und help("xgboost-deprecated").

The warning is fine, but the error seems a bit harsh.

[mayer79]

Ah, I see this is already discussed here: #10563