stackdump spec fixes (thread var race and timeout)
stackdump spec fixes (thread var race and timeout)

celluloid/celluloid,dilumn/celluloid,seuros/celluloid,kenichi/celluloid,davydovanton/celluloid,olleolleolle/celluloid,marshall-lee/celluloid,TiagoCardoso1983/celluloid,jasonm23/celluloid