[R] Shiny debug mode- reort a bug R version 4.0.2

[Jeff Newmiller]

If you can provide a reproducible example that does not require RStudio to trigger the error then someone here might try to dig into this. But technically this mailing list is about the R language, not editors or contributed packages, so maybe not. RStudio injects various "helper" functions into R when it loads R that are most likely the source of this (mis-)behavior. Asking at the RStudio support forum seems more likely to get a useful answer sooner.

On August 14, 2020 3:08:35 PM PDT, Mani Solimani via R-help <r-help using r-project.org> wrote:
>
>DearR-help Community,
>
> 
>
>since Iupdated the R V.3:6 to R.V4.0.2 I have the following problem:
>It might be the problem of R, if the same pack worksunder V.3.6 and
>suddenly not in V.4.0.2.
>- Session info
>----------------------------------------------------------------------------------------------------------------------
>setting  value                       
> version  R version 4.0.2 (2020-06-22)
>os       Windows 10 x64              
> system   x86_64, mingw32             
> ui       RStudio                     
> language (EN)                        
> collate  German_Germany.1252         
> ctype    German_Germany.1252         
> tz       Europe/Berlin               
> date     2020-08-13                  
> 
>- Packages
>--------------------------------------------------------------------------------------------------------------------------
>package     * version date       lib source        
> assertthat    0.2.1   2019-03-21 [1] CRAN (R 4.0.2)
>base64enc     0.1-3   2015-07-28 [1] CRAN (R 4.0.0)
>cli           2.0.2   2020-02-28 [1] CRAN (R 4.0.2)
>crayon        1.3.4   2017-09-16 [1] CRAN (R 4.0.2)
>fansi         0.4.1   2020-01-08 [1] CRAN (R 4.0.2)
>glue          1.4.1   2020-05-13 [1] CRAN (R 4.0.2)
>jsonlite      1.7.0   2020-06-25 [1] CRAN (R 4.0.2)
>lattice       0.20-41 2020-04-02 [1] CRAN (R 4.0.2)
>magrittr      1.5     2014-11-22 [1] CRAN (R 4.0.2)
>Matrix        1.2-18  2019-11-27 [1] CRAN (R 4.0.2)
>rappdirs      0.3.1   2016-03-28 [1] CRAN (R 4.0.2)
>Rcpp          1.0.5   2020-07-06 [1] CRAN (R 4.0.2)
>reticulate  * 1.16    2020-05-27 [1] CRAN (R 4.0.2)
>rstudioapi    0.11    2020-02-07 [1] CRAN (R 4.0.2)
>sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 4.0.2)
>tensorflow  * 2.2.0   2020-05-11 [1] CRAN (R 4.0.2)
>tfruns        1.4     2018-08-25 [1] CRAN (R 4.0.2)
>whisker       0.4     2019-08-28 [1] CRAN (R 4.0.2)
>withr         2.2.0   2020-04-20 [1] CRAN (R 4.0.2)
>
>
>
>If I create an app in RStudio,  and then change into debug mode with
>"browser()", my R aborts.
>
>
>
>I cannot see why? The problem did not exist as I usedR V3.6 3 days ago.
>For instance, as you can see in the following, my collougeuses still R
>V3.6 and the debug mode works well.
>
>[[elided Yahoo spam]]
>
>Thanks a lot
>
>Cheers 
>Mani
>
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>	[[alternative HTML version deleted]]
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-- 
Sent from my phone. Please excuse my brevity.