Your reasoning is excellent -- it's only your basic assumptions that are wrong. ...
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ID Status▲ Resolution Sev Product Comp▲ Assignee▲ Reporter Summary
3079 CLOS FIXE blo Sisyphus gdk-pixb phoenix raorn Must require gdk-pixbuf-xlib

File a new bug in the "gdk-pixbuf-devel" component of the "Sisyphus" product