Error(s) in re-building vignettes:
--- re-building 'algorithm.Rmd' using rmarkdown
--- finished re-building 'algorithm.Rmd'

--- re-building 'extend.Rmd' using rmarkdown
--- finished re-building 'extend.Rmd'

--- re-building 'overview.Rmd' using rmarkdown
Could not fetch https://travis-ci.org/daattali/ddpcr.svg?branch=master
HttpExceptionRequest Request {
  host                 = "travis-ci.org"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/daattali/ddpcr.svg"
  queryString          = "?branch=master"
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (TooManyRedirects [Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=D%2B6FcKWr%2FX7jNHDc%2BkYWuQcoJpD4dAj4JGdI%2FVMX9Qe0ZMPdoK5WGpuBlbT7krAdt2%2BLESqfVBh%2BSHGCQqam1cFFWTR8WDpmiOZ2kyeJAXH6BVbrcPY84gq7qSzcA%2BuH\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038ddcfe81623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=8X9PEXVj7fZ3zm4PLRUnNjc7JuMRIrRJL%2BXeKD2PuIpf5gE1jmetU8OxxHIJB%2F8hAykg116GhaVq5MQLSIqbsThhRFtLi324UjNyZNweuTHW2jrjwrcb5QpFGER6udCk\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038dd1f2f1623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=3ZnwZjh8fjoAiQCb3y4vy4FolGNqAldfok7UiBJiYnjPS4Xx6lsLBAahcS4e1Ei1Pi%2FCX2gJ7ILCAL%2FTAUJlW%2F4eBzvJKb6KvLv%2FfPdHzhnn0cfsJVZ1om9Me1KSQl62\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038dc5e8c1623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=Wle08lDKsnGVSPHoxTc%2F5dIUvexNBEqd%2FQZIufJv3jDQ1i8syWRFzaF%2B2QttNAhU6ALwkTdh77HU%2B%2BIlHFA9eth6PCCKA7kceIfgN7ulK5COTZ8XIqtG4IXEYKOLIvxx\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038dbadd61623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=w%2FXNOKP0eX%2B%2FIQ21Fn6Z30SmmzX7LqkSjC3IcmG2PeiVEh%2F2rCvCAPN1eCoSLyMomPK5sn3vxIoyKvkg5xl7Wa%2BDC7s2mTzpDMPWKKgdbTLAfWkoefHEhKJnxt4RpYki\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038dafcc61623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=SxcsZYF7itvZXkr4sgPXW3M%2FFwePcZXQXea5ZaFMmBicmJQhawniFZ5R3C%2B6lSxH0GeEESp61O8JE0X6BDNzu%2BP7onq3x%2BNLSSrsNZx63RbKDxIiCQaDEzB8UM1HUhPq\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038da3bfd1623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=%2BOBc0hY96C4SjELS0GpdoGGV%2FuACcrU9cfAbg0wb6P7Qj%2BnmupMfnOOXPtx9M7dRgkKRSyRL7xSAIsKkl5FTsPcFseADjdBpF9%2FeAgaM%2FcxMTNGZVkZXBVJrGnM8E3V%2B\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038d97b521623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:15 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=t7i5ErjaYTXglNF1Zt%2BItSU0PJbPxkS%2Bh87px61A2uhQdagEq4GOfwLYebkAuJFHjomM3n%2Fvi1ueC%2BE0VlvkPnLeqayBBY%2BjKTZ9r3ARWDVDYkDscm9qbZ4GLNgzeJh9\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038d8ca911623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:14 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=mOCClzLSb5%2FrVyeb1rhkZj6%2BfnCgOmCMh3YF7iLKy9UPFzRj7JYzLwS%2Fsmu872Yzs8io3iUkX5xd9Sr8cCVO8RYflrNfTZ%2B4OpXeDWwYy%2BNdgMpClkK16RGTisbH3CAb\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038d809fa1623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:14 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=P%2BJKMNLOqU7GsAUpX3cdJGNP0kyu8eGwwB7oVDHBiKjnOVgUaYFEyCuLJOiCSD9y%2FRma9%2FoRcsEQ3aJzggZQOg%2Fs1qYUoGhKFAZLMt5P%2F9GN0JUrSLiLwbWNvWYH%2BGgs\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038d759221623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Sun, 26 Mar 2023 14:53:14 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/daattali/ddpcr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=N3c%2FWnRzcJAg%2FdgTFjWpIH3pNAsoqhkLYlRjde53csyZr%2FZNSpu01mi4eUWlIE8vkhtCz8BgdZMRJVt9WPdTbpcE4hw7oPf7XvTY0JDoOi%2BnAN%2FNeFpT4MIySHhJYJey\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae038d5efd11623-DUS"),("alt-svc","h3=\":443\"; ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose}])
Error: processing vignette 'overview.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'overview.Rmd'

--- re-building 'technical_details.Rmd' using rmarkdown
--- finished re-building 'technical_details.Rmd'

SUMMARY: processing the following file failed:
  'overview.Rmd'

Error: Vignette re-building failed.
Execution halted