ClientContext:_write_some: release buffer once data really accepted f…

…or sending may fix #1872
esp8266 · Jan 31, 2018 · fc93c5c · fc93c5c
1 parent 4bafbe5
commit fc93c5c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libraries/ESP8266WiFi/src/include/ClientContext.h b/libraries/ESP8266WiFi/src/include/ClientContext.h
@@ -447,8 +447,8 @@ class ClientContext
             }
             err_t err = tcp_write(_pcb, buf, next_chunk, TCP_WRITE_FLAG_COPY);
             DEBUGV(":wrc %d %d %d\r\n", next_chunk, will_send, (int) err);
-            _datasource->release_buffer(buf, next_chunk);
             if (err == ERR_OK) {
+                _datasource->release_buffer(buf, next_chunk);
                 _written += next_chunk;
                 need_output = true;
             } else {