This test passes if it does not crash.

${}_{}{}_{}{}_{}{}_{}{}_{}{}_{}{}_{}$ ${}^{}{}^{}{}^{}{}^{}{}^{}{}^{}{}^{}$ ${}_{}^{}{}_{}^{}{}_{}^{}{}_{}^{}{}_{}^{}{}^{}{}^{}{}_{}^{}{}_{}^{}{}_{}^{}$ $_{}_{}^{}{}_{}{}_{}{}^{}{}_{}{}^{}{}_{}{}^{}{}_{}{}_{}{}^{}{}_{}{}_{}{}^{}{}_{}_{}^{}{}_{}{}_{}{}^{}{}_{}{}^{}{}_{}_{}^{}{}_{}{}_{}{}^{}{}_{}{}^{}{}_{}{}^{}{}_{}_{}^{}{}_{}$