Fix extraneous argument in async_write_header

fix #655

CHANGELOG.md

@@ -1,9 +1,15 @@
+Version 82:
+
 * Documentation tidying
 * is_invocable works with move-only types
 * Use std::function and reference wrapper
 * Add session_alloc to example/common
 * Silence spurious warning
 
+HTTP
+
+* Fix extraneous argument in async_write_header
+
 WebSocket
 
 * stream tidying

include/beast/http/impl/write.ipp

@@ -647,7 +647,7 @@ async_write_header(
             detail::serializer_is_header_done,
                 isRequest, Body, Fields>{
                     init.completion_handler, stream, sr}(
-                        error_code{}, 0);
+                        error_code{});
     return init.result.get();
 }
 

test/http/write.cpp

@@ -9,6 +9,7 @@
 #include <beast/http/write.hpp>
 
 #include <beast/http/buffer_body.hpp>
+#include <beast/http/empty_body.hpp>
 #include <beast/http/fields.hpp>
 #include <beast/http/message.hpp>
 #include <beast/http/read.hpp>
@@ -791,16 +792,30 @@ public:
         }
     }
 
+    void
+    testIssue655()
+    {
+        boost::asio::io_service ios;
+        test::pipe c{ios};
+
+        response<empty_body> res;
+        res.chunked(true);
+        response_serializer<empty_body> sr{res};
+        async_write_header(c.client, sr,
+            [&](const error_code&)
+            {
+            });
+
+        ios.run();
+    }
+
     void run() override
     {
+        testIssue655();
         yield_to(
             [&](yield_context yield)
             {
                 testAsyncWrite(yield);
-            });
-        yield_to(
-            [&](yield_context yield)
-            {
                 testFailures(yield);
             });
         testOutput();