select() function error with poorly named variables in dataframes

[MilesOtt]

If a dataframe has a variable name "" then select will not work (this is being returned by a dataframe in a function someone else wrote) Here I'm running dplyr() 0.2

require(dplyr)
ds = data.frame(x=rnorm(5), y=rnorm(5))
tmp1 = select(ds, x) # this works

names(ds) = c("V1", "") # this is not a good idea, but it is legal?
tmp2 = select(ds, V1)  # this does not work

Here is the error message:

Error in list2env(names_list, parent = env) : 
  attempt to use zero-length variable name