[Users] (Fedora) Crash when cancelling print dialog

[Johan Vromans]

Hi,

I can consistently crash 4.0.0 on Fedora 33 as follows:

- Startup
- Open (view) an arbitrary message that is handled by Fancy
- Ctrl-P (this opens the print dialog. Note that the print dialog is missing the [Preview] button)
- Press the print dialog Cancel button

When run from the console, these are the messages shown:

(claws-mail:766556): GLib-GObject-WARNING **: 07:59:48.858:
../gobject/gsignal.c:2614: signal 'resource-request-starting' is invalid
for instance '0x55d607ed9de0' of type 'WebKitWebView'

(claws-mail:766556): GLib-GObject-WARNING **: 07:59:48.858:
../gobject/gsignal.c:2614: signal 'resource-load-failed' is invalid for
instance '0x55d607ed9de0' of type 'WebKitWebView'

(claws-mail:766556): GLib-GObject-WARNING **: 07:59:51.391:
../gobject/gsignal.c:2614: signal 'resource-request-starting' is invalid
for instance '0x55d6089e6460' of type 'WebKitWebView'

(claws-mail:766556): GLib-GObject-WARNING **: 07:59:51.391:
../gobject/gsignal.c:2614: signal 'resource-load-failed' is invalid for
instance '0x55d6089e6460' of type 'WebKitWebView'

** (claws-mail:766556): CRITICAL **: 07:59:51.391: Cannot register URI
scheme cid more than once

** (claws-mail:766556): WARNING **: 07:59:51.600:
GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate
remote peer.

** (claws-mail:766556): WARNING **: 07:59:51.620:
GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate
remote peer. double free or corruption (out)

-- Johan