If there's no kythe node available for a type when resolving a VName, throw an exception with the type name so it's easier to debug.
If there's no kythe node available for a type when resolving a VName, throw an exception with the type name so it's easier to debug.

RELNOTES=n/a

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=189227475

google/dagger,cgruber/dagger,cgruber/dagger,google/dagger,ze-pequeno/dagger,dushmis/dagger,google/dagger,google/dagger,ze-pequeno/dagger,cgruber/dagger,ze-pequeno/dagger,dushmis/dagger,ze-pequeno/dagger