texmath-0.6.7: tests/writers/mover-09.tex
\underset{\phantom{\mathrm{fail}}}{\overset{\mathrm{top}}{\mathrm{-\ middle\ -}}}=\overset{\mathrm{top}}{\underset{\phantom{\mathrm{fail}}}{\mathrm{-\ middle\ -}}}\underset{\phantom{\mathrm{fail}}}{\overset{\mathrm{top}}{\mathrm{-\ middle\ -}}}=\overset{\mathrm{top}}{\underset{\phantom{\mathrm{fail}}}{\mathrm{-\ middle\ -}}}