Bug#1112227: libwebkit2gtk-4.0-37: Gnome Online Accounts not working, shows error "Webkit encountered an internal error"

[Adrian Bunk]

On Thu, Nov 13, 2025 at 01:21:56PM +0100, Emilio Pozuelo Monfort wrote:
> On 12/11/2025 08:13, Sylvain Beucler wrote:
> > Hi,
> > 
> > On 10/31/25 13:48, Emilio Pozuelo Monfort wrote:
> > > On 31/10/2025 13:16, Adrian Bunk wrote:
> > > > On Fri, Oct 31, 2025 at 11:05:46AM +0100, Emilio Pozuelo Monfort wrote:
> > > > > On 02/09/2025 11:51, Adrian Bunk wrote:
> > > > > > On Fri, Aug 29, 2025 at 01:30:05AM +0300, Konstantin Pokotilenko wrote:
> > > > > > > В Чт, 28/08/2025 в 12:59 +0300, Adrian Bunk пишет:
> > > > > > > > On Wed, Aug 27, 2025 at 10:08:05PM +0300, Konstantin Pokotilenko
> > > > > > > > wrote:
> > > > > > > > > В Ср, 27/08/2025 в 20:30 +0300, Adrian Bunk пишет:
> > > > > > > > > ...
> > > > > > > > > > Two additional questions:
> > > > > > > > > > 1. Do you have an HTTP proxy configured?
> > > > > > > > > > 2. If yes, using PAC (proxy auto-config)?
> > > > > > > > > > 
> > > > > > > > > > I am asking since my guess is that the new WebKitGTK broke
> > > > > > > > > > libproxy1-plugin-webkit, which is used for parsing PAC files.
> > > > > > > > > 
> > > > > > > > > Thanks for quick response.
> > > > > > > > > 
> > > > > > > > > No HTTP proxy used.
> > > > > > > > > 
> > > > > > > > > I found out a simpler reproduction, it is to just run WebKit
> > > > > > > > > example
> > > > > > > > > browser: /usr/lib/x86_64-linux-gnu/webkit2gtk-4.0/MiniBrowser
> > > > > > > > > ...
> > > > > > > > 
> > > > > > > > That was helpful.
> > > > > > > > 
> > > > > > > > Please check if you have libproxy1-plugin-networkmanager
> > > > > > > > installed, and whether removing it fixes the issue.
> > > > > > > 
> > > > > > > It was installed. Removing it fixes the issue.
> > > > > > 
> > > > > > Emilio, I can reproduce this in bookworm by compiling webkit2gtk with
> > > > > > libc++-16 there.
> > > > > 
> > > > > Were you able to reproduce this on bullseye?
> > > > 
> > > > Yes:
> > > > 
> > > > $ /usr/lib/x86_64-linux-gnu/webkit2gtk-4.0/MiniBrowser
> > > > WebKitNetworkProcess: /build/libproxy-cqqv9A/libproxy-0.4.17/
> > > > libmodman/module_manager.hpp:58: std::vector<T*>
> > > > libmodman::module_manager::get_extensions() const [with T =
> > > > libproxy::network_extension]: Assertion `obj != NULL' failed.
> > > > ERROR: WebKit encountered an internal error. This is a WebKit bug.
> > > > ../Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp(577) :
> > > > internallyFailedLoadTimerFired
> > > > 
> > > > > I am trying to, by installing
> > > > > libproxy1-plugin-networkmanager, setting a proxy in NM (via PAC file
> > > > > or URL),
> > > > 
> > > > No proxy setting required.
> > > > 
> > > > > but I can't get MiniBrowser to crash.
> > > > 
> > > > MiniBrowser itself does not crash.
> > > > 
> > > > Does it show you a webpage or "WebKit encountered an internal error"?
> > > 
> > > With no proxy set, it shows me webkitgtk.org, and I can navigate just
> > > fine (e.g. go to the planet.webkitgtk.org link, or enter https://
> > > google.com).
> > 
> > Same here.
> > 
> > Also for the previous atril report #1101807, my base bullseye VM has
> > libproxy1-plugin-networkmanager installed as a dependency of package
> > 'gnome', so it already was installed when I attempted to reproduce the
> > issue there.
> > 
> > Hence some additional condition seems required to trigger the issue.
> 
> I have prepared a backport of webkit 2.50.1 to bullseye. Adrian, can you try
> it out and see if that still crashes? Or if you have any further input on
> how to reproduce the crash I'd try with 2.48 (and then with 2.50). Binaries
> are available from [1].

Still reproduces for me.

One thing I noticed is that the crash in MiniBrowser does not happen in 
100% of all cases, the problem might be some corruption that manifests 
in different ways.

I am always getting the
  ERROR: WebKit encountered an internal error. This is a WebKit bug.
in the terminal where I started MiniBrowser.

> Cheers,
> Emilio

cu
Adrian