parse_url error on local file URI

[daroczig]

As far as I know, the URI schema for files is file://host/path, which becomes file:///path on localhost, so eg file:///tmp/foobar is valid, but parse_url fails on it:

> parse_url("file:///tmp/foobar")
Error in pieces[[1]] : subscript out of bounds

Session info:

> library(httr)
> devtools::session_info()
Session info -------------------------------------------------------------------
 setting  value                       
 version  R version 3.2.2 (2015-08-14)
 system   x86_64, linux-gnu           
 ui       X11                         
 language (EN)                        
 collate  en_US.UTF-8                 
 tz       <NA>                        

Packages -----------------------------------------------------------------------
 package   * version date       source        
 curl        0.9.3   2015-08-25 CRAN (R 3.1.2)
 devtools    1.8.0   2015-05-09 CRAN (R 3.1.2)
 digest      0.6.8   2014-12-31 CRAN (R 3.1.1)
 git2r       0.10.1  2015-05-07 CRAN (R 3.1.2)
 httr      * 1.0.0   2015-06-25 CRAN (R 3.1.2)
 magrittr    1.5     2014-11-22 CRAN (R 3.1.1)
 memoise     0.2.1   2014-04-22 CRAN (R 3.1.1)
 R6          2.1.1   2015-08-19 CRAN (R 3.1.2)
 Rcpp        0.12.2  2015-11-15 CRAN (R 3.2.2)
 rversions   1.0.1   2015-06-06 CRAN (R 3.1.2)
 stringi     0.5-5   2015-06-29 url (/@)      
 stringr     1.0.0   2015-04-30 CRAN (R 3.1.2)
 xml2        0.1.1   2015-06-02 CRAN (R 3.1.2)

I verified that the same error happens with the current dev version of httr as well.

[daroczig]

Thank you!