methods library not loaded

[HarlanH]

A script I've written using httr works fine interactively, but dies with the following error when run via Rscript:

Error in getCurlHandle(cookiefile = cookie_path, .defaults = list()) :
  could not find function "getClass"
Calls: POST ... handle_url -> find_handle -> handle -> getCurlHandle -> .Call

The workaround is to add library(methods) to the user code. Presumably httr should do that...

[hadley]

Actually, I think that's a RCurl bug (I don't think httr uses methods anywhere). And really it's an R CMD check bug that this doesn't get picked up automatically.

[holgerbrandl]

Similar problem for me. When I try to source a https link using source_url (from the devtools package) I'll get the following error when using Rscript (via R it runs fine):
Error in getCurlHandle(cookiefile = cookie_path, .defaults = list()) :
could not find function "getClass"
Calls: source_url ... handle_url -> find_handle -> handle -> getCurlHandle -> .Call

However, I've discovered that the problem disappears if I add
library(RCurl)
before calling source_url.