Ignore earlier lattice states.
Ignore earlier lattice states.

If we attempt to bind a lattice with a value we've already progressed
past, ignore it, but don't return an error.  This is semantically
equivalent to allowing rebinds of the same value in the single
assignment store.

lasp-lang/lasp,ergl/lasp,ergl/lasp,lasp-lang/lasp,ergl/lasp,lasp-lang/lasp,lasp-lang/lasp,ergl/lasp