[Rd] Possible Bug: file.exists() Function. Due to UTF-8 Encoding differences on Windows between R 4.0.1 and R 3.6.3?

Wed Jun 10 13:06:38 CEST 2020

Dear R Developers,

I am having an issue with the renv package and R 4.0.1, which I
suspect is related to base R and not the renv package itself, as with
R 3.6.3 such an "error" does not appear.

The error is raised by a file.exists() path, and path
"C:\Users\J-tel\Documents", which in R 3.6.3 is read correctly, but in
R 4.0.1 fails (Probably because of the "-" symbol), and I suspect it
might be related with the new UTF-8 usage on Windows 10?
(https://developer.r-project.org/Blog/public/2020/05/02/utf-8-support-on-windows/index.html)

I have also checked file.exists() function and its internals, and seem
not to have happened changes in the meanwhile within them:

https://github.com/wch/r-source/blob/0e3b3182f87a60af4b0293a5410dde680b910f49/src/library/base/R/files.R
https://github.com/search?q=SEXP%20attribute_hidden%20do_fileexists+repo:wch/r-source&type=Code

Error Details:

> renv::init()
Error in file.exists(children) :
  file name conversion problem -- name too long?
> traceback()
14: file.exists(children)
13: renv_dependencies_find_dir_children(path, root)
12: renv_dependencies_find_dir(path, root)
11: FUN(X[[i]], ...)
10: lapply(path, renv_dependencies_find_impl, root = root)
9: renv_dependencies_find(path, root)
8: (function (path = getwd(), root = NULL, ..., progress = TRUE,
       errors = c("reported", "fatal", "ignored"), dev = FALSE)
   {
       path <- renv_path_normalize(path, winslash = "/", mustWork = TRUE)
       root <- root %||% renv_dependencies_root(path)
       if (exists(path, envir = `_renv_dependencies`))
           return(get(path, envir = `_renv_dependencies`))
       renv_dependencies_begin(root = root)
       on.exit(renv_dependencies_end(), add = TRUE)
       dots <- list(...)
       if (identical(dots[["quiet"]], TRUE)) {
           progress <- FALSE
           errors <- "ignored"
       }
       files <- renv_dependencies_find(path, root)
       deps <- renv_dependencies_discover(files, progress, errors)
       renv_dependencies_report(errors)
       deps
   })(path, progress = FALSE, errors = errors, dev = TRUE)
7: eval(call, envir = parent.frame(2))
6: eval(call, envir = parent.frame(2))
5: delegate(renv_dependencies_impl)
4: dependencies(path, progress = FALSE, errors = errors, dev = TRUE)
3: withCallingHandlers(dependencies(path, progress = FALSE, errors = errors,
       dev = TRUE), renv.dependencies.error =
renv_dependencies_error_handler(message,
       errors))
2: renv_dependencies_scope(project, action = "init")
1: renv::init()

> renv::diagnostics()
Diagnostics Report -- renv [0.10.0]
===================================

# Session Info =======================
R version 4.0.1 (2020-06-06)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

locale:
[1] LC_COLLATE=Spanish_Spain.1252  LC_CTYPE=Spanish_Spain.1252
[3] LC_MONETARY=Spanish_Spain.1252 LC_NUMERIC=C
[5] LC_TIME=Spanish_Spain.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] renv_0.10.0

loaded via a namespace (and not attached):
 [1] compiler_4.0.1   rsconnect_0.8.16 htmltools_0.4.0  tools_4.0.1
 [5] yaml_2.2.1       Rcpp_1.0.4.6     rmarkdown_2.2    knitr_1.28
 [9] xfun_0.14        digest_0.6.25    packrat_0.5.0    rlang_0.4.6
[13] evaluate_0.14

# Project ============================
Project path: "~/Test2"

# Status =============================

# Lockfile ===========================
This project has not yet been snapshotted: 'renv.lock' does not exist.

# Library ============================
The project library "~/Test2/renv/library/R-4.0/x86_64-w64-mingw32"
does not exist.

# Dependencies =======================

# User Profile =======================
[no user profile detected]

# Settings ===========================
List of 6
 $ external.libraries       : chr(0)
 $ ignored.packages         : chr(0)
 $ package.dependency.fields: chr [1:3] "Imports" "Depends" "LinkingTo"
 $ snapshot.type            : chr "implicit"
 $ use.cache                : logi TRUE
 $ vcs.ignore.library       : logi TRUE

# Options ============================
List of 1
 $ renv.verbose: logi TRUE

# Environment Variables ==============
HOME        = C:\Users\J-tel\OneDrive\Documents
LANG        = <NA>
R_LIBS      = <NA>
R_LIBS_SITE = <NA>
R_LIBS_USER = C:/Users/J-tel/OneDrive/Documents/R/win-library/4.0

# PATH ===============================
- C:\rtools40\usr\bin
- C:\Program Files\R\R-4.0.1\bin\x64
- C:\ProgramData\Miniconda3
- C:\ProgramData\Miniconda3\Library\mingw-w64\bin
- C:\ProgramData\Miniconda3\Library\usr\bin
- C:\ProgramData\Miniconda3\Library\bin
- C:\ProgramData\Miniconda3\Scripts
- C:\ProgramData\Oracle\Java\javapath
- C:\WINDOWS\system32
- C:\WINDOWS
- C:\WINDOWS\System32\Wbem
- C:\WINDOWS\System32\WindowsPowerShell\v1.0\
- C:\WINDOWS\System32\OpenSSH\
- C:\Program Files\MiKTeX 2.9\miktex\bin\x64\
- C:\ProgramData\Miniconda3\Scripts\conda.exe

# Cache ==============================
There are a total of 0 package(s) installed in the renv cache.
Cache path: "C:/Users/J-tel/AppData/Local/renv/cache/v5/R-4.0/x86_64-w64-mingw32"

System Information:

> R.Version()
$platform
[1] "x86_64-w64-mingw32"

$arch
[1] "x86_64"

$os
[1] "mingw32"

$system
[1] "x86_64, mingw32"

$status
[1] ""

$major
[1] "4"

$minor
[1] "0.1"

$year
[1] "2020"

$month
[1] "06"

$day
[1] "06"

$`svn rev`
[1] "78648"

$language
[1] "R"

$version.string
[1] "R version 4.0.1 (2020-06-06)"

$nickname
[1] "See Things Now"

Thank you,
Juan