1*e1fe3e4aSElliott Hughes# https://github.com/fonttools/fonttools/issues/2276 2*e1fe3e4aSElliott Hugheslookup EMPTY { 3*e1fe3e4aSElliott Hughes # pass 4*e1fe3e4aSElliott Hughes} EMPTY; 5*e1fe3e4aSElliott Hughesfeature ss01 { 6*e1fe3e4aSElliott Hughes sub a by a.alt1; 7*e1fe3e4aSElliott Hughes lookup EMPTY; 8*e1fe3e4aSElliott Hughes} ss01; 9*e1fe3e4aSElliott Hughesfeature aalt { 10*e1fe3e4aSElliott Hughes feature ss01; 11*e1fe3e4aSElliott Hughes} aalt; 12