Yes that theming.js around like 479 (on bionic) looks like a candidate
for calling the offending `meta_workspace_list_windows`:

    _dockIsNear: function() {
        if (this._dockActor.has_style_pseudo_class('overview'))
            return false;
        /* Get all the windows in the active workspace that are in the primary 
monitor and visible */
        let activeWorkspace = global.screen.get_active_workspace();
        let dash = this._dash;
        let windows = 
activeWorkspace.list_windows().filter(function(metaWindow) {
            return metaWindow.get_monitor() === dash._monitorIndex &&
                   metaWindow.showing_on_its_workspace() &&
                   metaWindow.get_window_type() != Meta.WindowType.DESKTOP;
        });

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https://bugs.launchpad.net/bugs/1832869

Title:
  gnome-shell crashed with SIGSEGV in g_hash_table_iter_next →
  meta_display_list_windows → meta_workspace_list_windows →
  ffi_call_SYSV → ffi_call()

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