43e846dc68
Allocation of a value and bitmask input are two different constraints in the constraint system. However, for all values other than 'null', there should be exactly one bitmask input and one allocation constraint. The bitmask input was omitted in some cases in the handling of externals, which is fixed in this CL. BUG= R=kustermann@google.com Review URL: https://chromereviews.googleplex.com/481187013 .