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Re: [libmicrohttpd] Assertion failure with raw "GET /" request

From: silvioprog
Subject: Re: [libmicrohttpd] Assertion failure with raw "GET /" request
Date: Wed, 2 Dec 2020 12:18:20 -0300

>  We should indeed make a new release...

This version is being awaited! ūüôŹ

On Tue, Dec 1, 2020 at 7:29 PM Christian Grothoff <> wrote:
Hi Niels,

I can confirm the issue, alas it was already fixed in Git master (by
Evgeny) in October. We should indeed make a new release...

(Note: the assertion was basically wrong, so when compiling without
assertions means that there is no harm from the issue.)

Happy hacking!


On 12/1/20 2:24 PM, Niels Martignène via libmicrohttpd wrote:
> I have managed to get the following assertion failure when sending a simple "GET /" request with netcat to a debug build (libmicrohttpd 0.9.71).
>     minimal_example: memorypool.c:324: MHD_pool_reallocate: Assertion `old == ((void *)0) || pool->memory + pool->pos > (uint8_t*) old' failed.
> I can reproduce this error with the minimal_example.c example. First, build and start the server with:
>     ./configure --enable-asserts
>     make
>     src/examples/minimal_example 8888
> And then, in a separate terminal, run this:
>     echo -e "GET /\r\n\r\n" | nc 8888
> This should trigger the assert and crash the server. The crash does not happen with "GET / HTTP/1.0".

Silvio Clécio

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