Apply patch by muktupavels that restores window list functionality

[Photon89]

See https://gitlab.gnome.org/GNOME/libwnck/-/issues/162#note_2338372

[DarthGandalf]

I see this in log:

 at bin/shutter line 9369. Shutter::App::fct_init_depend() called at bin/shutter line 200 Subroutine lookup redefined at /home/somebody/shutter/share/shutter/resources/modules/Shutter/Draw/DrawingTool.pm line 28. require Shutter/Draw/DrawingTool.pm called at bin/shutter line 233 Use of uninitialized value $wm_name in pattern match (m//) at bin/shutter line 8492, <DATA> line 19. Shutter::App::fct_ret_workspace_menu("") called at bin/shutter line 608 Shutter::App::__ANON__(Wnck::Screen=HASH(0x5622a11ea260), Wnck::Workspace=HASH(0x5622a13a60e8)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680 Shutter::App::fct_update_gui() called at bin/shutter line 4098 Shutter::App::fct_try_init_tray() called at bin/shutter line 810 Shutter::App::STARTUP(Shutter::App=HASH(0x5622a11bbee8)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x5622a11bbee8)) called at bin/shutter line 11212 *** unhandled exception in callback: *** Can't call method "reparent" on an undefined value at bin/shutter line 8569, <DATA> line 19. *** Shutter::App::fct_ret_workspace_menu("") called at bin/shutter line 608 *** Shutter::App::__ANON__(Wnck::Screen=HASH(0x5622a11ea260), Wnck::Workspace=HASH(0x5622a13a60e8)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680 *** Shutter::App::fct_update_gui() called at bin/shutter line 4098 *** Shutter::App::fct_try_init_tray() called at bin/shutter line 810 *** Shutter::App::STARTUP(Shutter::App=HASH(0x5622a11bbee8)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x5622a11bbee8)) called at bin/shutter line 11212 *** ignoring at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67, <DATA> line 19. at bin/shutter line 5680, <DATA> line 19. Shutter::App::fct_update_gui() called at bin/shutter line 4098 Shutter::App::fct_try_init_tray() called at bin/shutter line 810 Shutter::App::STARTUP(Shutter::App=HASH(0x5622a11bbee8)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x5622a11bbee8)) called at bin/shutter line 11212

[Photon89]

$wm_name is defined here. Are we sure that the proposed patch triggers the issue? It looks like a new issue to me, originally the whole $wnck_screen was undefined, now it just fails to get the window manager's name. Maybe we can catch it and set $wm_name to something like "not-compiz", if $wnck_screen->get_window_manager_name returns undefined?

[Photon89]

@DarthGandalf Could you please test if the latest commit fixes the issue for you?

[DarthGandalf]

$ bin/shutter WARNING: gnome-web-photo is missing --> screenshots of websites will be disabled! at bin/shutter line 9352. Shutter::App::fct_init_depend() called at bin/shutter line 200 WARNING: Image::ExifTool is missing --> writing Exif information will be disabled! at bin/shutter line 9371. Shutter::App::fct_init_depend() called at bin/shutter line 200 Subroutine lookup redefined at /home/somebody/shutter/share/shutter/resources/modules/Shutter/Draw/DrawingTool.pm line 28. require Shutter/Draw/DrawingTool.pm called at bin/shutter line 233 Use of uninitialized value $wm_name in pattern match (m//) at bin/shutter line 8494, <DATA> line 19. Shutter::App::fct_ret_workspace_menu("") called at bin/shutter line 608 Shutter::App::__ANON__(Wnck::Screen=HASH(0x55d604eca840), Wnck::Workspace=HASH(0x55d60536c688)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680 Shutter::App::fct_update_gui() called at bin/shutter line 4098 Shutter::App::fct_try_init_tray() called at bin/shutter line 810 Shutter::App::STARTUP(Shutter::App=HASH(0x55d604eb56f0)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x55d604eb56f0)) called at bin/shutter line 11214 *** unhandled exception in callback: *** Can't call method "reparent" on an undefined value at bin/shutter line 8571, <DATA> line 19. *** Shutter::App::fct_ret_workspace_menu("") called at bin/shutter line 608 *** Shutter::App::__ANON__(Wnck::Screen=HASH(0x55d604eca840), Wnck::Workspace=HASH(0x55d60536c688)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680 *** Shutter::App::fct_update_gui() called at bin/shutter line 4098 *** Shutter::App::fct_try_init_tray() called at bin/shutter line 810 *** Shutter::App::STARTUP(Shutter::App=HASH(0x55d604eb56f0)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67 *** Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x55d604eb56f0)) called at bin/shutter line 11214 *** ignoring at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67, <DATA> line 19. at bin/shutter line 5680, <DATA> line 19. Shutter::App::fct_update_gui() called at bin/shutter line 4098 Shutter::App::fct_try_init_tray() called at bin/shutter line 810
Shutter::App::STARTUP(Shutter::App=HASH(0x55d604eb56f0)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x55d604eb56f0)) called at bin/shutter line 11214
*** unhandled exception in callback:
*** Can't call method "set_menu" on an undefined value at bin/shutter line 620, <DATA> line 19.
*** Shutter::App::__ANON__(Wnck::Screen=HASH(0x55d604eca840)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
*** eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
*** Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680
*** Shutter::App::fct_update_gui() called at bin/shutter line 4098
*** Shutter::App::fct_try_init_tray() called at bin/shutter line 810
*** Shutter::App::STARTUP(Shutter::App=HASH(0x55d604eb56f0)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
*** Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x55d604eb56f0)) called at bin/shutter line 11214
*** ignoring at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67, <DATA> line 19.
at bin/shutter line 5680, <DATA> line 19.
Shutter::App::fct_update_gui() called at bin/shutter line 4098
Shutter::App::fct_try_init_tray() called at bin/shutter line 810
Shutter::App::STARTUP(Shutter::App=HASH(0x55d604eb56f0)) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
Glib::Object::Introspection::__ANON__(Shutter::App=HASH(0x55d604eb56f0)) called at bin/shutter line 11214
Use of uninitialized value $wm_name in pattern match (m//) at bin/shutter line 8494, <DATA> line 19.
Shutter::App::fct_ret_workspace_menu("") called at bin/shutter line 616
Shutter::App::__ANON__(Wnck::Screen=HASH(0x55d604eca840), undef) called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
eval {...} called at /usr/lib64/perl5/vendor_perl/5.42/x86_64-linux/Glib/Object/Introspection.pm line 67
Glib::Object::Introspection::__ANON__() called at bin/shutter line 5680
Shutter::App::fct_update_gui() called at bin/shutter line 4098
.......

[Photon89]

So, basically, $wnck_screen->can('get_window_manager_name') returns true, but $wnck_screen->get_window_manager_name is empty...

[Photon89]

@DarthGandalf Now that 0.99.7 is out, there is no hurry, but if you have some spare time, please test the latest commit, I think, it should fix the issue. 😃