* using log directory ‘/srv/hornik/tmp/CRAN_pretest/usefun.Rcheck’
* using R Under development (unstable) (2024-09-13 r87144)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    Debian clang version 18.1.8 (9)
    Debian flang-new version 18.1.8 (9)
* running under: Debian GNU/Linux trixie/sid
* using session charset: UTF-8
* 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 ... [4s/6s] Note_to_CRAN_maintainers
Maintainer: ‘John Zobolas <bblodfon@gmail.com>’
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking serialization versions ... OK
* checking whether package ‘usefun’ can be installed ... [3s/3s] OK
* checking package directory ... OK
* checking for future file timestamps ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [1s/1s] OK
* checking whether the package can be loaded with stated dependencies ... [1s/1s] OK
* checking whether the package can be unloaded cleanly ... [1s/1s] OK
* checking whether the namespace can be loaded with stated dependencies ... [1s/1s] OK
* checking whether the namespace can be unloaded cleanly ... [1s/1s] OK
* checking loading without being on the library search path ... [1s/1s] OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [4s/4s] OK
* checking Rd files ... [0s/0s] OK
* checking Rd metadata ... OK
* checking Rd line widths ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking examples ... [4s/4s] OK
* checking for unstated dependencies in ‘tests’ ... OK
* checking tests ... [2s/2s] OK
  Running ‘testthat.R’ [1s/1s]
* checking PDF version of manual ... [4s/4s] WARNING
LaTeX errors when creating PDF version.
This typically indicates Rd problems.
LaTeX errors found:
! LaTeX Error: There's no line here to end.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
* checking PDF version of manual without index ... ERROR
* checking HTML version of manual ... [1s/1s] OK
* checking for non-standard things in the check directory ... NOTE
Found the following files/directories:
  ‘usefun-manual.tex’
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR, 1 WARNING, 1 NOTE