{"record":{"id":"a41b9041ac41978f","repo":"bevyengine/bevy","slug":"did-not-implement-reflect","errorCode":null,"errorMessage":"`{}` did not implement `Reflect`","messagePattern":"`(.+?)` did not implement `Reflect`","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/bevy_ecs/src/reflect/bundle.rs","lineNumber":240,"sourceCode":"                        ),\n                    }\n                }\n            },\n            remove: |entity| {\n                entity.remove::<B>();\n            },\n            take: |entity| {\n                entity\n                    .take::<B>()\n                    .map(|bundle| Box::new(bundle).into_reflect())\n            },\n        })\n    }\n}\n\nfn apply_field(entity: &mut EntityMut, field: &dyn PartialReflect, registry: &TypeRegistry) {\n    let Some(type_id) = field.try_as_reflect().map(Any::type_id) else {\n        panic!(\n            \"`{}` did not implement `Reflect`\",\n            field.reflect_type_path()\n        );\n    };\n    if let Some(reflect_component) = registry.get_type_data::<ReflectComponent>(type_id) {\n        reflect_component.apply(entity.reborrow(), field);\n    } else if let Some(reflect_bundle) = registry.get_type_data::<ReflectBundle>(type_id) {\n        reflect_bundle.apply(entity.reborrow(), field, registry);\n    } else {\n        panic!(\n            \"no `ReflectComponent` nor `ReflectBundle` registration found for `{}`\",\n            field.reflect_type_path()\n        );\n    }\n}\n\nfn apply_or_insert_field_mapped(\n    entity: &mut EntityWorldMut,","sourceCodeStart":222,"sourceCodeEnd":258,"githubUrl":"https://github.com/bevyengine/bevy/blob/396ca727080776bd313bb892423b7d94e03b81b4/crates/bevy_ecs/src/reflect/bundle.rs#L222-L258","documentation":"Panic in apply_field: a bundle field being applied is only a PartialReflect (try_as_reflect returned None), so its concrete TypeId cannot be obtained to look up ReflectComponent/ReflectBundle registration. The field's dynamic representation does not carry the Reflect data needed for entity application.","triggerScenarios":"Thrown at crates/bevy_ecs/src/reflect/bundle.rs:240 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Ensure the field's type implements Reflect (not just PartialReflect) and is registered","Convert dynamic field data into the concrete type with from_reflect before applying","Handle the None case of try_as_reflect with a fallback path instead of panicking"],"exampleFix":null,"handlingStrategy":"type-guard","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"396ca727080776bd313bb892423b7d94e03b81b4","analyzedAt":"2026-08-20T16:12:39.808Z","contentChangedAt":"2026-08-20T16:12:39.808Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}