title: R lubridate package installation - Error in as.POSIXlt
body: <p>I am trying to install the package lubridate of R but I have always the same error message. 
  Looking around it looks related to the fact that it has a function date() which already exist
  also as base::date(). But during the test of the package it calls date() and therefore the error.</p>
  
  <p>Here what I get:</p>
  
  <pre><code>install.packages("lubridate")
  Installing package into ‘/home/user/R/i586-pc-linux-gnu-library/3.3’
  (as ‘lib’ is unspecified)
  trying URL 'https://cran.rstudio.com/src/contrib/lubridate_1.6.0.tar.gz'
  Content type 'unknown' length 317672 bytes (310 KB)
  ==================================================
  downloaded 310 KB
  
  * installing *source* package ‘lubridate’ ...
  ** package ‘lubridate’ successfully unpacked and MD5 sums checked
  ** libs
  installing to /home/user/R/i586-pc-linux-gnu-library/3.3/lubridate/libs
  ** R
  ** data
  *** moving datasets to lazyload DB
  ** inst
  ** preparing package for lazy loading
  ** help
  *** installing help indices
  ** building package indices
  ** installing vignettes
  ** testing if installed package can be loaded
  Error in as.POSIXlt(x, tz = tz(x)) : 
    argument "x" is missing, with no default
  Calls: .Last -&gt; cat -&gt; paste -&gt; date -&gt; date.default -&gt; as.POSIXlt
  Execution halted
  ERROR: loading failed
  * removing ‘/home/user/R/i586-pc-linux-gnu-library/3.3/lubridate’
  Warning in install.packages :
    installation of package ‘lubridate’ had non-zero exit status
  
  The downloaded source packages are in
      ‘/tmp/RtmpuzZ3SK/downloaded_packages’
  </code></pre>
  
  <p>Here my sessionInfo():</p>
  
  <pre><code>sessionInfo()
  R version 3.3.3 (2017-03-06)
  Platform: i586-pc-linux-gnu (32-bit)
  Running under: Debian GNU/Linux 8 (jessie)
  
  locale:
   [1] LC_CTYPE=en_GB.UTF-8       LC_NUMERIC=C              
   [3] LC_TIME=en_GB.UTF-8        LC_COLLATE=en_GB.UTF-8    
   [5] LC_MONETARY=en_GB.UTF-8    LC_MESSAGES=en_GB.UTF-8   
   [7] LC_PAPER=en_GB.UTF-8       LC_NAME=C                 
   [9] LC_ADDRESS=C               LC_TELEPHONE=C            
  [11] LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C       
  
  attached base packages:
  [1] graphics  grDevices utils     methods   base     
  
  loaded via a namespace (and not attached):
  [1] tools_3.3.3
  </code></pre>
  
  <p>Any idea how to avoid this problem?</p>