potential fix for #162. Might have side-effects. Needs testing.
potential fix for #162. Might have side-effects. Needs testing.

syrenio/powerset,zhanghuijun-hello/test,syrenio/upset,syrenio/powerset,syrenio/upset,zhanghuijun-hello/test,syrenio/powerset,zhanghuijun-hello/test,XDATA-Year-3/UpSet,XDATA-Year-3/UpSet,VCG/upset,syrenio/powerset,XDATA-Year-3/UpSet,XDATA-Year-3/UpSet,XDATA-Year-3/UpSet,syrenio/upset,VCG/upset,VCG/upset,VCG/upset,syrenio/upset,zhanghuijun-hello/test