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Re: [libmicrohttpd] SEGFAULT after upgrading from 0.9.77 to 1.0.1


From: Evgeny Grin
Subject: Re: [libmicrohttpd] SEGFAULT after upgrading from 0.9.77 to 1.0.1
Date: Tue, 27 Feb 2024 18:19:46 +0100
User-agent: Mozilla Thunderbird

Hi Markus,

Can you share a larger piece of code or give more details, like used mode (internal polling or external polling), polling function, other relevant information?

--
Evgeny

27-Feb-2024 17:58 (UTC+0100), Markus Doppelbauer via libmicrohttpd wrote:
What was your issue? How did you fix it?

I am getting "Assertion failed" from "connection.c:6864":
   case MHD_CONNECTION_CHUNKED_BODY_UNREADY:
     mhd_assert (0);

This happens if I create a response from callback, e.g.:

    struct MHD_Response *response = MHD_create_response_from_callback( MHD_SIZE_UNKNOWN, 32*1024, content_reader_callback, userdata, NULL );
     MHD_add_response_header( response, header.name, header.value );
     statuscode = MHD_queue_response( connection, 200, response );
     MHD_destroy_response( response );



Am Montag, dem 26.02.2024 um 20:51 -0300 schrieb silvioprog:
Problem fixed! \o/

I have a couple of test cases that call some MHD functions internally, but after creating fake MHD_Connections to pass to the functions instead of NULL the problem was fixed.

Thanks a lot guys!

On Mon, Feb 26, 2024 at 5:41 PM silvioprog <silvioprog@gmail.com <mailto:silvioprog@gmail.com>> wrote:
Seems like it will be hard to figure out the problem. I mean, since the application is crashing, I can understand what is happening. The only error message I could catch was this one in the attached picture.

I'll to try to fix the problem or at least reproduce it.

On Mon, Feb 26, 2024 at 4:54 PM silvioprog <silvioprog@gmail.com <mailto:silvioprog@gmail.com>> wrote:
Hey Christian. =)

Yes sure, I'll try to reproduce the problem and provide all the logs.

On Mon, Feb 26, 2024 at 4:23 PM Christian Grothoff <grothoff@gnunet.org <mailto:grothoff@gnunet.org>> wrote:
Hi Silvio,

Well, we didn't try to break anything with the update, so you shouldn't
have to change anything on your side either. Can you send us a stack
trace/valgrind output and/or test code to reproduce? That'll expedite a
fix...

Happy hacking!

-Christian

--
Silvio Clécio


--
Silvio Clécio

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