安装包失败并显示： if (file.exists(dest) && file.mtime(dest) 中出现错误

我正在尝试安装重新思考

httr::set_config( httr::config( ssl_verifypeer = 0L ) ) 
with_config(use_proxy("http://myco.com:5555"), install_github("rmcelreath/rethinking", lib ="C://TOOLS/R-3.4.0/library"))

我收到错误消息：

Downloading GitHub repo rmcelreath/rethinking@master
from URL https://api.github.com/repos/rmcelreath/rethinking/zipball/master
Installing rethinking
Error in if (file.exists(dest) && file.mtime(dest) > file.mtime(lib) &&  : 
  missing value where TRUE/FALSE needed
Error in if (file.exists(dest) && file.mtime(dest) > file.mtime(lib) &&  : 
  missing value where TRUE/FALSE needed

关于我的版本的一些信息：

> packageVersion("devtools")
[1] ‘1.12.0’
> packageVersion("httr")
[1] ‘1.2.1’
> R.Version()$version.string
[1] "R version 3.4.0 (2017-04-21)"

您能建议如何让安装正常工作吗？

谢谢。

++++++++++++++ 当我运行 TRACEBACK() 时，我得到

3: installed.packages()
2: as.data.frame(installed.packages(), stringsAsFactors = F)
1: (function () 
   {
       uniqueLibPaths <- .rs.uniqueLibraryPaths()
       x <- suppressWarnings(library(lib.loc = uniqueLibPaths))
       x <- x$results[x$results[, 1] != "base", ]
       pkgs.name <- x[, 1]
       pkgs.library <- x[, 2]
       pkgs.desc <- x[, 3]
       pkgs.url <- file.path("help/library", pkgs.name, "html", 
           "00Index.html")
       loaded.pkgs <- .rs.pathPackage()
       pkgs.loaded <- !is.na(match(normalizePath(paste(pkgs.library, 
           pkgs.name, sep = "/")), loaded.pkgs))
       instPkgs <- as.data.frame(installed.packages(), stringsAsFactors = F)
       pkgs.version <- character(length = length(pkgs.name))
       for (i in 1:length(pkgs.name)) {
           pkgs.version[[i]] <- .rs.packageVersion(pkgs.name[[i]], 
               pkgs.library[[i]], instPkgs)
       }
       pkgs.library <- .rs.createAliasedPath(pkgs.library)
       packages = data.frame(name = pkgs.name, library = pkgs.library, 
           version = pkgs.version, desc = pkgs.desc, url = pkgs.url, 
           loaded = pkgs.loaded, check.rows = TRUE, stringsAsFactors = FALSE)
       packages[order(packages$name), ]
   })()

这似乎是 3.4.0 的一个普遍错误。在Windows下。

尝试重新安装已打补丁的版本，看看是否有帮助..

https://cran.r-project.org/bin/windows/base/rpatched.html https://cran.r-project.org/bin/windows/base/rpatched.html

Update:R 3.4.1。已被释放。这也可能会解决您的问题。https://cran.r-project.org/bin/windows/base/ https://cran.r-project.org/bin/windows/base/