{"record":{"id":"e72973816b5b089c","repo":"FyroxEngine/Fyrox","slug":"failed-to-remap-handle-of-node-e72973","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":243,"sourceCode":"                ));\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()\n                && !self.try_map_reflect(handle)\n            {\n                Log::warn(format!(\n                    \"Failed to remap handle {}:{} of node {}!\",\n                    handle.reflect_index(),\n                    handle.reflect_generation(),\n                    node_name\n                ));\n            }\n            mapped = true;\n        }\n\n        if mapped {\n            return;\n        }\n\n        if let Some(inheritable) = entity.as_inheritable_variable_mut() {\n            // In case of inheritable variable we must take inner value and do not mark variables as modified.\n            self.remap_handles_any(inheritable.inner_value_mut(), node_name, ignored_types);\n\n            mapped = true;","sourceCodeStart":225,"sourceCodeEnd":261,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-graph/src/lib.rs#L225-L261","documentation":"Same family as the previous error, but for the reflection-based path: remap_handles_any finds a handle via Reflect (e.g. inside a Vec<Handle<Node>> or Option<Handle<Node>>) and try_map_reflect fails. Because reflection cannot print the typed handle, it logs index:generation instead. The affected handle stays unmapped.","triggerScenarios":"remap_handles / remap_handles_any encountering handles stored inside reflected containers (Vec, Option, HashMap fields) whose value is missing from the old->new mapping.","commonSituations":"Prefab nodes with arrays of handles (particle systems, sound sources, UI widget lists); remapping after resource re-save changed indices; cloned subgraphs referencing nodes outside the cloned set.","solutions":["Rebuild the mapping from a fresh instantiation of the current resource version.","Find which reflected field holds the dangling handle (node name is in the message) and clear or reassign it in the prefab.","Ensure all referenced nodes exist in the source resource before remapping.","If handles intentionally point outside the remapped set, exclude them or extend try_map's delegate to return a valid fallback."],"exampleFix":"// before\n#[derive Reflect)] struct Emitter { targets: Vec<Handle<Node>> } // stale handles after re-save\n// after\n// re-instantiate resource then remap, or clear dangling targets\nemitter.targets.retain(|h| graph.is_valid_handle(*h));","handlingStrategy":"validation","validationCode":"// scan reflected fields for handles missing from the map before remapping\nfn dangling_reflected_handles<N: Reflect>(root: &dyn Reflect, map: &OldNewMapping) -> Vec<usize> {\n    let mut out = vec![];\n    root.enumerate::<Handle<Node>>(&mut |h| {\n        if h.is_some() && map.try_map(*h).is_none() { out.push(h.index()); }\n    });\n    out\n}","typeGuard":"fn valid_reflect_handle(h: &dyn ReflectHandle) -> bool { h.reflect_is_some() && map_contains(h.reflect_index(), h.reflect_generation()) }","tryCatchPattern":"let dangling = dangling_reflected_handles(node.as_reflect(), &map);\nif !dangling.is_empty() { log::warn!(\"remap will warn for handles {:?}\", dangling); }","preventionTips":["Keep handle arrays referencing only nodes in the same resource","Re-save prefabs atomically and re-instantiate dependents","Run is_valid_handle checks on reflected handle collections after prefab edits","Avoid manual edits to prefab files that shift node indices"],"tags":["graph","handles","reflection","remap"],"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"}