[Rd] _R_CHECK_LENGTH_1_LOGIC2_ setting and Rstudio ..

Martin Maechler m@ech|er @end|ng |rom @t@t@m@th@ethz@ch
Fri Nov 15 17:59:33 CET 2019

>>>>> Martin Maechler 
>>>>>     on Fri, 15 Nov 2019 17:31:15 +0100 writes:

    > as ((strongly recommended by me for package developers !))

    > _R_CHECK_LENGTH_1_LOGIC2_=verbose

Apropos, for many months now, when very occasionally using
Rstudio (notably for teaching to beginners),
I've needed to use a wrapper shell script *unsetting* these,
because otherwise I've got "a bomb" from trying to run Rstudio,
as it internally uses code that fails when
is activated, see the screen shot (from the very latest
Rstudio 1.2.5019), 
at least in my case where I use a non-trival  'options(repos = ..)'
in my startup.

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