[Users] [Bug 4695] New: CM segfaults when hitting "V" while reading HTML mail with Dillo plugin enabled

[noreply at thewildbeast.co.uk]

https://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=4695

            Bug ID: 4695
           Summary: CM segfaults when hitting "V" while reading HTML mail
                    with Dillo plugin enabled
           Product: Claws Mail
           Version: GIT
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: major
          Priority: P3
         Component: Plugins/Dillo-Viewer
          Assignee: users at lists.claws-mail.org
          Reporter: philippe at gramoulle.com

CM segfaults while doing the following

1/ open CM and make sure Dillo-Viewer plugin is loaded

2/ Open mail that contains HTML

3/ Click the HTML icon at the right side of the windows (HTML renders fine)

3/ hit 'V' to hide/show Message View-> CM segfaults

What i can assess for sure :

 - CM segfaults only if Dillo-Viewer plugin is used.
 - CM doesn't always segfault : with some HTML emails, hitting 'V' works as
expected.
 I can provide offending mail offline if necessary

 Here is the message in the console when I hit 'V': 

(claws-mail:14258): Gtk-CRITICAL **: 22:52:42.469: gtk_widget_realize:
assertion 'widget->priv->anchored || GTK_IS_INVISIBLE (widget)' failed
Segmentation fault

Here is the last lines with running CM in debug mode :

a_Dicache_cleanup: length = 0
mimeview.c:863:text/html
dillo_viewer.c:160:dillo_clear_viewer
dillo_viewer.c:161:Removing dillo socket 0x19634d0
dillo_viewer.c:69:Destroyed dillo socket 0x19634d0
dillo_viewer.c:61:dillo_get_widget
dillo_viewer.c:121:dillo_show_mimepart
dillo_viewer.c:136:Adding dillo socket 0x1ac03d0

As i stripped CM binary, I will recompile to try to get a valid stack trace.

Environnement is Raspberry Pi 4 , Debian 10.13, latest GIT version.

Thanks,

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