[Rd] Need help on calling Head from C

Radford Neal radford at cs.toronto.edu
Thu Jun 26 23:25:27 CEST 2014

> Thank you for the wonderful suggestion .  do you suggest to protect
> ScalarInteger(1)
> before calling lang3 ?

Yes, either the result of Scalar Integer(1) or the result of install
should be protected (before calling lang3 - don't try to do it inside
the argument list of lang3).

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