http://bugs.winehq.org/show_bug.cgi?id=59528 --- Comment #1 from Hans Leidekker <hans@meelstraat.net> --- The app sends a POST request in async mode and then writes the post data while handling the SENDREQUEST_COMPLETE callback. This works but then it proceeds to call WinHttpReceiveResponse() still on the same thread and we queue it because we're in async mode. The app doesn't expect that because it proceeds to call WinHttpQueryHeaders() to get the response status and content length. It doesn't check the return value and calls WinHttpReadData() next which ends up crashing because the response hasn't been received yet. Receiving the response synchronously fixes it. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.