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main: Avoid a crash with crossing event handling

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We are reusing the GtkCrossingData struct for multiple
calls here, so we need to make sure that the targets
stay alive from beginning to end.

Fixes: #3090
This commit is contained in:
Matthias Clasen 2020-08-26 07:26:01 -04:00
parent 44741e1b77
commit b6eb85ee72
1 changed files with 5 additions and 2 deletions
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7
gtk/gtkmain.c
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@ -1335,9 +1335,9 @@ gtk_synthesize_crossing_events (GtkRoot *toplevel,
crossing.type = crossing_type;
crossing.mode = mode;
crossing.old_target = old_target;
crossing.old_target = old_target ? g_object_ref (old_target) : NULL;
crossing.old_descendent = NULL;
crossing.new_target = new_target;
crossing.new_target = new_target ? g_object_ref (new_target) : NULL;
crossing.new_descendent = NULL;
crossing.drop = drop;
@ -1417,6 +1417,9 @@ gtk_synthesize_crossing_events (GtkRoot *toplevel,
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
}
g_clear_object (&crossing.old_target);
g_clear_object (&crossing.new_target);
gtk_widget_stack_clear (&target_array);
}