Handle missing product

src/lib/y2packager/clients/inst_product_upgrade_license.rb

@@ -21,14 +21,27 @@ module Y2Packager
   module Clients
     # This client shows a license confirmation dialog for the upgraded base product
     #
-    # The client will be skipped (returning `:auto`) in these situations:
-    #
-    # * There is no license available for the selected base product.
-    # * There is only 1 base product (not a multi-product media at all).  In
-    #   that case, the license is supposed to has been already accepted in the
-    #   welcome screen.
+    # The client will display an error and return :back if not product is found.
+    # If no license is found for the selected product it returns :auto.
     # @see Y2Packager::Clients::InstProductLicense
     class InstProductUpgradeLicense < InstProductLicense
+
+      def main
+        textdomain "installation"
+
+        if !product
+          # TRANSLATORS: An error message, the package solver could not find
+          # any product to upgrade in the selected partition.
+          Report.Error(_("Error: Cannot find any product to upgrade.\n" \
+            "Make sure the selected partition contains an upgradable product."))
+          return :back
+        end
+
+        return :auto unless available_license?
+
+        Y2Packager::Dialogs::InstProductLicense.new(product).run
+      end
+
     private
 
       # Return the selected base product for upgrade