• using R Under development (unstable) (2026-06-06 r90114)
• using platform: x86_64-pc-linux-gnu
• R was compiled by     gcc-16 (Debian 16.1.0-1) 16.1.0     GNU Fortran (Debian 16.1.0-1) 16.1.0
• running under: Debian GNU/Linux forky/sid
• using session charset: UTF-8 * current time: 2026-06-07 14:30:20 UTC
• checking for file ‘usefun/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘usefun’ version ‘0.5.2’
• package encoding: UTF-8
• checking CRAN incoming feasibility ...