Allow stack path to release the lock immediately.  Fixes #872
Allow stack path to release the lock immediately.  Fixes #872

Blaisorblade/stack,anton-dessiatov/stack,keent/stack,phadej/stack,rubik/stack,MichielDerhaeg/stack,sjakobi/stack,vigoo/stack,lukexi/stack,achernyak/stack,luigy/stack,mrkkrp/stack,mathhun/stack,mathhun/stack,rrnewton/stack,harendra-kumar/stack,AndreasPK/stack,rvion/stack,supermario/stack,juhp/stack,rvion/stack,lukexi/stack,martin-kolinek/stack,meiersi-11ce/stack,Fuuzetsu/stack,sjakobi/stack,fizruk/stack,martin-kolinek/stack,achernyak/stack,vigoo/stack,Heather/stack,anton-dessiatov/stack,rubik/stack,AndrewRademacher/stack,harendra-kumar/stack,supermario/stack,deech/stack,rrnewton/stack,juhp/stack,phadej/stack,deech/stack,fizruk/stack,AndrewRademacher/stack,Heather/stack,Fuuzetsu/stack,mrkkrp/stack,Blaisorblade/stack,narrative/stack,AndreasPK/stack,luigy/stack,meiersi-11ce/stack,keent/stack,MichielDerhaeg/stack,narrative/stack