extension-manager crashes when browsing behind a proxy

[jorge]

Ubuntu 22.04 freshly installed.

Proxy configured in Settings GUI, /etc/profile and /etc/apt/apt.conf . Browsing the web, installing software and stuff like that all works.

When I run extension manager it loads, but as soon as I hit the browse button it crashes immediately with the following output.

```
$ extension-manager

(extension-manager:17154): GLib-GIO-WARNING **: 17:41:17.971: Invalid proxy URI 'proxy.inst.edu.uy:3128': Invalid URI ‘proxy.inst.edu.uy:3128’
**
GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Bail out! GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Aborted (core dumped)
```

The proxy look like (real url redacted):
```
$ echo $https_proxy
proxy.inst.edu.uy:3128
```

If I replace the proxy with its IP adress (IP redacted), the crash changes:

```
$ export https_proxy=10.10.10.10:3128
$ extension-manager
**
GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Bail out! GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Aborted (core dumped)
```

[jorge (xxopxe)]

Trying to print from gedit or evince causes the same crash.

[Sacc.leo (gaelon)]

i have met the same issue and got this error:

10666 segmentation fault (core dumped) extension-manager

If the proxy is unset, all works fine.

[jorge (xxopxe)]

gnome-software also crashes:

$ gnome-software
19:38:54:0941 GLib-GIO Invalid proxy URI 'proxy.inst.edu.uy:3128': Invalid URI ‘proxy.inst.edu.uy:3128’
**
GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Bail out! GLib-GIO:ERROR:../../../gio/gsocketclient.c:1982:g_socket_client_enumerator_callback: assertion failed: (data->error_info->best_error)
Aborted (core dumped)

[jorge (xxopxe)]

Ok, I got it to work prepending "http://" to the proxy definition:

export http_proxy='http://proxy.inst.edu.uy:3128'
export https_proxy='http://proxy.inst.edu.uy:3128'

This is the first time I have to do that. Is this supposed to be this way?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.