Raise a Registration::InvalidURL exception, and report it.

src/lib/installation/clients/inst_update_installer.rb

@@ -176,6 +176,10 @@ def update_repositories
       @update_repositories = update_repositories_finder.updates
       log.info("self-update repositories are #{@update_repositories.inspect}")
       @update_repositories
+    rescue ::Registration::InvalidURL
+      Yast::Popup.Error(_("The registration URL provided is not valid.\n" \
+                          "Skipping installer update.\n"))
+      @update_repositories = []
     end
 
     # Return the custom self-update URL
@@ -311,6 +315,7 @@ def require_registration_libraries
       require "registration/url_helpers"
       require "registration/registration"
       require "registration/ui/regservice_selection_dialog"
+      require "registration/exceptions"
       @require_registration_libraries = true
     rescue LoadError
       log.info "yast2-registration is not available"

src/lib/installation/update_repositories_finder.rb

@@ -25,7 +25,6 @@
 Yast.import "Mode"
 Yast.import "Profile"
 Yast.import "ProductFeatures"
-Yast.import "Report"
 
 module Installation
   # This class find repositories to be used by the self-update feature.
@@ -126,9 +125,8 @@ def update_url_from_control
     def update_urls_from_connect
       begin
         url = registration_url
-      rescue URI::InvalidURIError => e
-        log.error("Custom registration url is wrong, URI failed with: #{e.message}")
-        return []
+      rescue URI::InvalidURIError
+        raise ::Registration::InvalidURL
       end
 
       return [] if url == :cancel
@@ -262,24 +260,6 @@ def import_registration_ayconfig
       )
     end
 
-    # Display a warning message about using the default update URL from
-    # control.xml when the registration server does not return any URL or fails.
-    # In AutoYaST mode the dialog is closed after a timeout.
-    def display_fallback_warning
-      # TRANSLATORS: error message
-      msg = _("<p>Cannot obtain the installer update repository URL\n" \
-        "from the registration server.</p>")
-
-      if update_url_from_control
-        # TRANSLATORS: part of an error message, %s is the default repository
-        # URL from control.xml
-        msg += _("<p>The default URL %s will be used.<p>") % update_url_from_control
-      end
-
-      # display the message in a RichText widget to wrap long lines
-      Yast::Report.LongWarning(msg)
-    end
-
     # Runs a block of code handling errors
     #
     # If errors should be shown, the helper {catch_registration_errors}