Log Message:
(devel/R-callr) Updated 3.4.3 to 3.4.4, make test  fails. Make test again pass (?)

# callr 3.4.4

* An `r_session` now exits if the load hook errors. This generates an error
  if the session is started with `wait = TRUE`. For `wait = FALSE` the
    first `$read()` operation will return with an error (#162).