Comment # 3 on bug 936710 from Stefan Hundhammer

ProductFeatures.rb:

158     # Restore product features in running system
159     # @note This is a stable API function
160     def Restore
161       InitFeatures(true)
162       groups = SCR.Dir(path(".product.features.section"))
163       Builtins.foreach(groups) do |group|
164         Ops.set(@features, group, Ops.get(@features, group, {}))
165         values = SCR.Dir(Ops.add(path(".product.features.value"), group))
166         Builtins.foreach(values) do |v|
167           Ops.set(
168             @features,
169             [group, v],
170             SCR.Read(
171               Ops.add(Ops.add(path(".product.features.value"), group), v)
172             )
173           )
174         end
175       end

So this line 170 where the exception is thrown is in an SCR agent. 
IMHO the agent should handle this gracefully.