Conflicting content type headers in request and request body

[mtalaeii]

Code

$form = new Form;
$form->addField(...);
$form->addField(...);
$request = new Request("https://example.com","POST");
$request->setBody($form);
$request->setHeader( "Content-Type","application/x-www-form-urlencoded;charset=UTF-8");
print($client->request($request)->getBody()->buffer());

Trace

PHP Fatal error:  Uncaught Amp\Http\Client\HttpException: Conflicting content type headers in request and request body: application/x-www-form-urlencoded;charset=UTF-8 / application/x-www-form-urlencoded in /home/Mahdi/test/vendor/amphp/http-client/src/Connection/Internal/RequestNormalizer.php:42
Stack trace:
#0 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/Internal/RequestNormalizer.php(23): Amp\Http\Client\Connection\Internal\RequestNormalizer::normalizeRequestBodyHeaders()
#1 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/Http1Connection.php(222): Amp\Http\Client\Connection\Internal\RequestNormalizer::normalizeRequest()
#2 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/HttpStream.php(96): Amp\Http\Client\Connection\Http1Connection->request()
#3 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\Connection\HttpStream->Amp\Http\Client\Connection\{closure}()
#4 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/HttpStream.php(96): Amp\Http\Client\processRequest()
#5 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/ConnectionLimitingPool.php(131): Amp\Http\Client\Connection\HttpStream->request()
#6 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/HttpStream.php(96): Amp\Http\Client\Connection\ConnectionLimitingPool->Amp\Http\Client\Connection\{closure}()
#7 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\Connection\HttpStream->Amp\Http\Client\Connection\{closure}()
#8 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/HttpStream.php(96): Amp\Http\Client\processRequest()
#9 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/DecompressResponse.php(43): Amp\Http\Client\Connection\HttpStream->request()
#10 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(53): Amp\Http\Client\Interceptor\DecompressResponse->requestViaNetwork()
#11 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\Connection\InterceptedStream->Amp\Http\Client\Connection\{closure}()
#12 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(36): Amp\Http\Client\processRequest()
#13 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/ModifyRequest.php(36): Amp\Http\Client\Connection\InterceptedStream->request()
#14 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(53): Amp\Http\Client\Interceptor\ModifyRequest->requestViaNetwork()
#15 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\Connection\InterceptedStream->Amp\Http\Client\Connection\{closure}()
#16 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(36): Amp\Http\Client\processRequest()
#17 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/ModifyRequest.php(36): Amp\Http\Client\Connection\InterceptedStream->request()
#18 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(53): Amp\Http\Client\Interceptor\ModifyRequest->requestViaNetwork()
#19 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\Connection\InterceptedStream->Amp\Http\Client\Connection\{closure}()
#20 /home/Mahdi/test/vendor/amphp/http-client/src/Connection/InterceptedStream.php(36): Amp\Http\Client\processRequest()
#21 /home/Mahdi/test/vendor/amphp/http-client/src/PooledHttpClient.php(36): Amp\Http\Client\Connection\InterceptedStream->request()
#22 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(30): Amp\Http\Client\PooledHttpClient->Amp\Http\Client\{closure}()
#23 /home/Mahdi/test/vendor/amphp/http-client/src/PooledHttpClient.php(29): Amp\Http\Client\processRequest()
#24 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/RetryRequests.php(34): Amp\Http\Client\PooledHttpClient->request()
#25 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(38): Amp\Http\Client\Interceptor\RetryRequests->request()
#26 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\InterceptedHttpClient->Amp\Http\Client\{closure}()
#27 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(28): Amp\Http\Client\processRequest()
#28 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/FollowRedirects.php(131): Amp\Http\Client\InterceptedHttpClient->request()
#29 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(38): Amp\Http\Client\Interceptor\FollowRedirects->request()
#30 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\InterceptedHttpClient->Amp\Http\Client\{closure}()
#31 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(28): Amp\Http\Client\processRequest()
#32 /home/Mahdi/test/vendor/amphp/http-client/src/Interceptor/ModifyRequest.php(48): Amp\Http\Client\InterceptedHttpClient->request()
#33 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(38): Amp\Http\Client\Interceptor\ModifyRequest->request()
#34 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(20): Amp\Http\Client\InterceptedHttpClient->Amp\Http\Client\{closure}()
#35 /home/Mahdi/test/vendor/amphp/http-client/src/InterceptedHttpClient.php(28): Amp\Http\Client\processRequest()
#36 /home/Mahdi/test/vendor/amphp/http-client/src/HttpClient.php(33): Amp\Http\Client\InterceptedHttpClient->request()
#37 /home/Mahdi/test/vendor/amphp/http-client/src/functions.php(30): Amp\Http\Client\HttpClient->Amp\Http\Client\{closure}()
#38 /home/Mahdi/test/vendor/amphp/http-client/src/HttpClient.php(30): Amp\Http\Client\processRequest()
#39 /home/Mahdi/test/test.php(60): Amp\Http\Client\HttpClient->request()
#40 {main}
  thrown in /home/Mahdi/test/vendor/amphp/http-client/src/Connection/Internal/RequestNormalizer.php on line 42

[kelunik]

Avoid manually setting the header.

[mtalaeii]

The problem here is header is the same header for sending form-encoded request just have charset=UTF-8
Can't add the support from that? or maybe i'm doing it in wrong way