Message-ID: <d6c35552-daad-0805-f191-62d08b5fd154@gmail.com>
Date: 2020-04-29T23:24:15Z
From: Samuele Carcagno
Subject: problem with `viridis` on Ubuntu 20.04
I've hit a bug on Ubuntu 20.04. The issue occurred both with the R
version that shipped with Ubuntu last week, and it is occurring now with
the CRAN packages from one of the mirros (deb
http://cran.mirror.garr.it/mirrors/CRAN/bin/linux/ubuntu/
focal-cran40/). The issue occurs whether I use the deb package for
viridis in the Ubuntu repos, or I install it with `install.packages()` in R.
The issue is that when I call a function from the 'viridis' package
(e.g. running the first example in the `viridis` vignette:
https://cran.r-project.org/web/packages/viridis/vignettes/intro-to-viridis.html)
R gets stuck indefinitely; the system monitor shows the R process using
CPU resources but nothing happens at the terminal and I'm also unable to
stop the function with Ctrl-C.
I did a little digging and simply calling the function `viridis` from
the `viridisLite` package causes the same problem, execution gets stuck
at the line:
cols <- fn_cols(seq(begin, end, length.out = n)) / 255
which is line 177 here:
https://github.com/sjmgarnier/viridisLite/blob/master/R/viridis.R#L177
I'm dual booting Debian Buster on the same machine and no such issue
occurs with R 4.0.0 and the same versions of the `viridis` and
`viridisLite` packages. Also no such issue occurs on Windows 10 or on a
Mac both with R 4.0.0 and the latest versions of `viridis` and
`viridisLite`.
I was not sure where should I report the bug, so I thought of asking for
advice here first.
Best,
Sam