{"record":{"id":"aebada5d5baa779a","repo":"FyroxEngine/Fyrox","slug":"failed-to-remap-handle-of-node","errorCode":null,"errorMessage":"Failed to remap handle {} of node {}!","messagePattern":"Failed to remap handle (.+?) of node (.+?)!","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"fyrox-graph/src/lib.rs","lineNumber":222,"sourceCode":"        let name = node.name().to_string();\n        self.remap_handles_any(node, &name, ignored_types);\n    }\n\n    pub fn remap_handles_any(\n        &self,\n        entity: &mut dyn Reflect,\n        node_name: &str,\n        ignored_types: &[TypeId],\n    ) {\n        if ignored_types.contains(&(*entity).type_id()) {\n            return;\n        }\n\n        let mut mapped = false;\n\n        if let Some(handle) = entity.downcast_mut::<Handle<N>>() {\n            if handle.is_some() && !self.try_map(handle) {\n                Log::warn(format!(\n                    \"Failed to remap handle {} of node {}!\",\n                    *handle, node_name\n                ));\n            }\n            mapped = true;\n        }\n\n        if mapped {\n            return;\n        }\n\n        // Handle derived entities handles.\n        if let Some(handle) = entity.as_handle_mut() {\n            if handle\n                .type_info_ref()\n                .derived_types\n                .contains(&TypeId::of::<N>())\n                && handle.reflect_is_some()","sourceCodeStart":204,"sourceCodeEnd":240,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-graph/src/lib.rs#L204-L240","documentation":"remap_handles_any walks every entity of a graph node and rewrites Handle<N> values through try_map (old->new id mapping after resource instantiation). When a handle is Some but not present in the mapping, this warning is logged; the handle is left unmapped and will likely point at the wrong node or be dangling.","triggerScenarios":"Calling Graph::remap_handles / remap_handles_any with a mapping whose keys do not cover all non-null handles stored in node properties (e.g. mapping built from a different resource instance, or handles pointing to nodes deleted from the source resource).","commonSituations":"Instantiating a scene prefab whose nodes were edited/re-saved (indices changed) after an instance was cached; cloning nodes across graphs without regenerating the handle map; manual edits to resource files. The typed Handle<N> path fires when the field is stored directly as Handle<N>.","solutions":["Re-instantiate the resource so the mapping covers all current handles (use ResourceData::instantiate or ensure instantiate_graph built the map).","Log/inspect the missing key: the unmapped handle index tells you which node in the source prefab is absent from your map.","Regenerate the old->new mapping from the actual resource version instead of a stale cached map.","Remove or fix nodes in the prefab that reference deleted nodes (the warning at fyrox-graph/src/lib.rs:1472 often precedes this)."],"exampleFix":"// before\nlet map = old_stale_mapping.clone();\ngraph.remap_handles(&map);\n// after\nlet mut map = old_stale_mapping.clone();\nfor (old, new) in resource.mapping() { map.entry(*old).or_insert(*new); }\ngraph.remap_handles(&map);","handlingStrategy":"validation","validationCode":"// verify all handles are mappable before remap\nfn all_mappable<N, M>(graph: &Graph, map: &M) -> bool\nwhere M: HandleMapDelegate<N> {\n    graph.linear_iter().all(|n| {\n        // reflect over node fields containing Handle<N> and check map presence\n        check_node_handles(n, map)\n    })\n}","typeGuard":"fn is_valid_source<N>(h: Handle<N>, src: &Graph) -> bool { src.is_valid_handle(h) }","tryCatchPattern":"// remap is warning-based; detect unmapped handles afterwards\ngraph.remap_handles(&map);\nassert!(graph.linear_iter().all(|n| node_handles_mapped(n, &map)));","preventionTips":["Rebuild mappings from the current resource version, never cache across edits","After editing a prefab, re-instantiate instead of remapping old instances","Use restore_integrity/synchronize instead of manual remap when possible","Validate source handles exist before building the map"],"tags":["graph","handles","remap","scene"],"backgroundTag":"handle-remap-failed","analyzedSha":"76c91aad8eca488ce527b1af707be8b3b24ad72d","analyzedAt":"2026-09-10T16:04:01.633Z","contentChangedAt":"2026-09-10T16:04:01.633Z","schemaVersion":2},"datasetVersion":"2026-09-16T09:17:16.951Z"}