Fix crash when dragging radial gradient (bug #363668)

diff --git a/src/event-context.cpp b/src/event-context.cpp
index 88b17e0011b942aea62c47d84b2e47094a54d54e..2bbdcee0703eb90e824e0f7cfcf8c7ef3c37c7bb 100644 (file)
--- a/src/event-context.cpp
+++ b/src/event-context.cpp
@@ -1258,12 +1258,21 @@ gboolean sp_event_context_snap_watchdog_callback(gpointer data)
                        sp_event_context_virtual_root_handler(ec, dse->getEvent());
                        break;
                case DelayedSnapEvent::EVENTCONTEXT_ITEM_HANDLER:
-                       g_assert(dse->getItem() != NULL);
-                       sp_event_context_virtual_item_handler(ec, dse->getItem(), dse->getEvent());
+                       {
+                               SPItem* item = NULL;
+                               item = dse->getItem();
+                               if (item && SP_IS_ITEM(item)) {
+                                       sp_event_context_virtual_item_handler(ec, item, dse->getEvent());
+                               }
+                       }
                        break;
                case DelayedSnapEvent::KNOT_HANDLER:
-                       g_assert(dse->getKnot() != NULL);
-                       sp_knot_handler_request_position(dse->getEvent(), dse->getKnot());
+                       {
+                               SPKnot* knot = dse->getKnot();
+                               if (knot && SP_IS_KNOT(knot)) {
+                                       sp_knot_handler_request_position(dse->getEvent(), knot);
+                               }
+                       }
                        break;
                default:
                        g_warning("Origin of snap-delay event has not been defined!;");