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

> ### Name: delete-requests
> ### Title: HTTP DELETE requests
> ### Aliases: delete-requests
> 
> ### ** Examples
> 
> (x <- HttpClient$new(url = "https://httpbin.org"))
<crul connection> 
  url: https://httpbin.org
  curl options: 
  proxies: 
  auth: 
  headers: 
> 
> ## a list
> (res1 <- x$delete('delete', body = list(hello = "world"), verbose = TRUE))
<crul response> 
  url: https://httpbin.org/delete
  request_headers: 
    User-Agent: libcurl/7.54.1 r-curl/2.8.1 crul/0.3.8
    Accept-Encoding: gzip, deflate
  response_headers: 
    status: HTTP/1.1 503 Service Unavailable
    connection: keep-alive
    server: Cowboy
    date: Wed, 30 Aug 2017 10:14:20 GMT
    content-length: 506
    content-type: text/html; charset=utf-8
    cache-control: no-cache, no-store
  status: 503
> jsonlite::fromJSON(res1$parse("UTF-8"))
* Found bundle for host httpbin.org: 0xa31f270 [can pipeline]
* timeout on name lookup is not supported
* Hostname in DNS cache was stale, zapped
*   Trying 23.23.134.171...
* TCP_NODELAY set
* Connected to httpbin.org (23.23.134.171) port 443 (#1)
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
*   CAfile: D:/RCompile/recent/R/etc/curl-ca-bundle.crt
  CApath: none
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: CN=httpbin.org
*  start date: Jul 15 23:42:00 2017 GMT
*  expire date: Oct 13 23:42:00 2017 GMT
*  subjectAltName: host "httpbin.org" matched cert's "httpbin.org"
*  issuer: C=US; O=Let's Encrypt; CN=Let's Encrypt Authority X3
*  SSL certificate verify ok.
> DELETE /delete HTTP/1.1
Host: httpbin.org
Accept: */*
User-Agent: libcurl/7.54.1 r-curl/2.8.1 crul/0.3.8
Accept-Encoding: gzip, deflate
Content-Length: 145
Content-Type: multipart/form-data; boundary=------------------------f2d51c7d4d08a3c3

< HTTP/1.1 503 Service Unavailable
< Connection: keep-alive
< Server: Cowboy
< Date: Wed, 30 Aug 2017 10:14:20 GMT
< Content-Length: 506
< Content-Type: text/html; charset=utf-8
< Cache-Control: no-cache, no-store
* HTTP error before end of send, stop sending
< 
* Closing connection 1
Error: lexical error: invalid char in json text.
                                       <!DOCTYPE html> 	<html> 	  <hea
                     (right here) ------^
Execution halted