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I am getting the error here in this Travis build, and I cannot reproduce it locally. Yes, I realize that I do not have a minimal reproducible example, but I do know that it happens within tidyselect::vars_select(). Has anyone else encountered this before? I cannot find any mention of lang_unnamespace() in a Google search.

moodymudskipper
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landau
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    If I run `getAnywhere("lang_unnamespace")` I see that it comes from the `rlang` package. It's not exported from that package so it's not meant to be used directly. – MrFlick Feb 20 '18 at 20:10
  • Hmm... when I run `getAnywhere("lang_unnamespace")`, I see `no object named 'lang_unnamespace' was found"`. I have `rlang` 0.2.0. What about you? – landau Feb 20 '18 at 20:20
  • I'm running `rlang_0.1.4` – MrFlick Feb 20 '18 at 20:21

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See if modifying your travis yaml to include the dev versions of the tidyverse packages help.

It looks like you're not calling rlang::lang_unnamespace() directly, correct? That function appears to have been removed, but tidyselect::vars_select() is still trying to call it.

I arbitrarily went back to the beginning of the year to see this old version.

The file doesn't even exist in today's version.

wibeasley
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  • Correct, I am not calling `rlang::lang_unnamespace()` directly. It's weird: both locally and on Travis, `rlang` 0.2.0 and `tidyselect` 0.2.3 are installed. Clearing the Travis cache seems to cause the first set of bulids to complete normally, but then the ones after that quit with the same error. – landau Feb 20 '18 at 21:07
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    A lot of the tidyverse packages were updated on CRAN yesterday. Travis might be pulling from different servers, with different versions. If you specify the dev location (which is GitHub in this case), you might get a consistent version. Using the `r_github_packages` argument in https://docs.travis-ci.com/user/languages/r/. – wibeasley Feb 20 '18 at 21:17
  • Now that you mention it, I see that the `rlang` CRAN checks are a mix between 0.1.6 and 0.2.0. I may just have to wait a bit. – landau Feb 20 '18 at 21:19
  • The error went away on Travis, but now it's on AppVeyor: https://ci.appveyor.com/project/ropensci/drake/build/1.0.564. – landau Feb 22 '18 at 13:21