[R] devtools - document() weiredness

[Johannes Graumann]

Hello,

Please try this:
> library(devtools)
> create("mdaa")
> setwd("mdaa")
> dev_mode()
d> install()

Produces 
...* DONE (mdaa)
Reloading installed mdaa

But when I then try to build documentation
d> document()

devtools/roxygen just hangs with a "?" like so:
Updating mdaa documentation
Loading mdaa
?

I know this scenario is strange as there's no roxygenizable stuff in the 
package, but I am trying to track down an identical error in one of my 
nascent packages and am wondering
1) where this behavior originates and
2) why document() does not provide more informative feedback.

Thanks, Joh