Defer to parent binder if it has an explicit binding

Author: eirikur-nc

injector/__init__.py

@@ -365,10 +365,19 @@ class MultiBindProvider(ListOfProviders[List[T]]):
     def get(self, injector: 'Injector') -> List[T]:
         result: List[T] = []
         for binding in self._multi_bindings:
-            scope_binding, _ = self._binder.get_binding(binding.scope)
+            if (
+                isinstance(binding.provider, ClassProvider)
+                and binding.scope is NoScope
+                and self._binder.parent
+                and self._binder.parent.has_explicit_binding_for(binding.provider._cls)
+            ):
+                parent_binding, _ = self._binder.parent.get_binding(binding.provider._cls)
+                scope_binding, _ = self._binder.parent.get_binding(parent_binding.scope)
+            else:
+                scope_binding, _ = self._binder.get_binding(binding.scope)
             scope_instance: Scope = scope_binding.provider.get(injector)
             provider_instance = scope_instance.get(binding.interface, binding.provider)
-            instances: List[T] = _ensure_iterable(provider_instance.get(injector))
+            instances = _ensure_iterable(provider_instance.get(injector))
             result.extend(instances)
         return result