Running examples in 'webmockr-Ex.R' failed
The error most likely occurred in:

> ### Name: UriPattern
> ### Title: UriPattern
> ### Aliases: UriPattern
> ### Keywords: internal
> 
> ### ** Examples
> 
> # trailing slash
> (z <- UriPattern$new(pattern = "http://foobar.com"))
<UriPattern>
  Public:
    add_query_params: function (query_params) 
    clone: function (deep = FALSE) 
    initialize: function (pattern = NULL, regex_pattern = NULL) 
    matches: function (uri) 
    pattern: http://foobar.com
    query_params: NULL
    regex: FALSE
    to_s: function () 
> z$matches("http://foobar.com")
[1] TRUE
> z$matches("http://foobar.com/")
[1] TRUE
> 
> # default ports
> (z <- UriPattern$new(pattern = "http://foobar.com"))
<UriPattern>
  Public:
    add_query_params: function (query_params) 
    clone: function (deep = FALSE) 
    initialize: function (pattern = NULL, regex_pattern = NULL) 
    matches: function (uri) 
    pattern: http://foobar.com
    query_params: NULL
    regex: FALSE
    to_s: function () 
> z$matches("http://foobar.com:80")
[1] TRUE
> z$matches("http://foobar.com:80/")
[1] TRUE
> z$matches("http://foobar.com:443")
[1] TRUE
> z$matches("http://foobar.com:443/")
[1] TRUE
> 
> # user info
> (z <- UriPattern$new(pattern = "http://foobar.com"))
<UriPattern>
  Public:
    add_query_params: function (query_params) 
    clone: function (deep = FALSE) 
    initialize: function (pattern = NULL, regex_pattern = NULL) 
    matches: function (uri) 
    pattern: http://foobar.com
    query_params: NULL
    regex: FALSE
    to_s: function () 
> z$matches("http://user:pass@foobar.com")
[1] FALSE
> 
> # regex
> (z <- UriPattern$new(regex_pattern = ".+ample\\.."))
<UriPattern>
  Public:
    add_query_params: function (query_params) 
    clone: function (deep = FALSE) 
    initialize: function (pattern = NULL, regex_pattern = NULL) 
    matches: function (uri) 
    pattern: http://.+ample\..
    query_params: NULL
    regex: TRUE
    to_s: function () 
> z$matches("http://sample.org")
[1] TRUE
> z$matches("http://example.com")
[1] TRUE
> z$matches("http://tramples.net")
[1] FALSE
> 
> # add query parameters
> (z <- UriPattern$new(pattern = "http://foobar.com"))
<UriPattern>
  Public:
    add_query_params: function (query_params) 
    clone: function (deep = FALSE) 
    initialize: function (pattern = NULL, regex_pattern = NULL) 
    matches: function (uri) 
    pattern: http://foobar.com
    query_params: NULL
    regex: FALSE
    to_s: function () 
> z$add_query_params(list(pizza = "cheese", cheese = "cheddar"))
Error in FUN(X[[i]], ...) : 
  no such symbol R_windows_build in package D:/temp/RtmpoHffi8/RLIBS_1cc7883b3186/curl/libs/x64/curl.dll
Calls: <Anonymous> ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted