[Rd] R-devel internal errors during check produce?

[Jan Gorecki]

No packages are being loaded, or even installed.
Did you try running the example on R-devel built with flags I have
provided in this email?
I checked now and it is required to use --enable-strict-barrier to
reproduce the issue.

On Tue, Jun 30, 2020 at 9:02 AM Martin Maechler
<maechler using stat.math.ethz.ch> wrote:
>
> >>>>> Kurt Hornik
> >>>>>     on Tue, 30 Jun 2020 06:20:57 +0200 writes:
>
> >>>>> Jan Gorecki writes:
>     >> Thank you both, You are absolutely correct that example
>     >> should be minimal, so here it is.
>
>     >> l = list(a=new.env(), b=new.env()) unique(l)
>
>     >> Just for completeness, env_list during check that raises
>     >> error
>
>     >> env_list <- list(baseenv(),
>     >>   as.environment("package:graphics"),
>     >>   as.environment("package:stats"),
>     >>   as.environment("package:utils"),
>     >>   as.environment("package:methods") )
>
>     >> unique(env_list)
>
>     > Thanks ... but the above work fine for me.  E.g.,
>
>     R> l = list(a=new.env(), b=new.env())
>     R> unique(l)
>     > [[1]] <environment: 0x55695f2f6d20>
>
>     > [[2]] <environment: 0x55695f2f6930>
>
>     > Best -k
>
> Ditto here;  also your (Jan) 2nd example works fine.
>
> So, you must have loaded some (untidy) packages / code which redefine
> standard base R behavior ?
>
> Martin
>
>