{"record":{"id":"7a993ad0e631f37e","repo":"Pumpkin-MC/Pumpkin","slug":"unexpected-event-7a993a","errorCode":null,"errorMessage":"unexpected event","messagePattern":"unexpected event","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/pumpkin-plugin-api/src/events/inventory/furnace_extract.rs","lineNumber":13,"sourceCode":"use super::super::FromIntoEvent;\nuse crate::wit::pumpkin::plugin::event::{Event, EventType, FurnaceExtractEventData};\n\n/// Event triggered when a player extracts items from a furnace output slot.\npub struct FurnaceExtractEvent;\nimpl FromIntoEvent for FurnaceExtractEvent {\n    const EVENT_TYPE: EventType = EventType::FurnaceExtractEvent;\n    type Data = FurnaceExtractEventData;\n\n    fn data_from_event(event: Event) -> Self::Data {\n        match event {\n            Event::FurnaceExtractEvent(data) => data,\n            _ => panic!(\"unexpected event\"),\n        }\n    }\n\n    fn data_into_event(data: Self::Data) -> Event {\n        Event::FurnaceExtractEvent(data)\n    }\n}\n","sourceCodeStart":1,"sourceCodeEnd":21,"githubUrl":"https://github.com/Pumpkin-MC/Pumpkin/blob/8d4639e25a57c15e47448ec327c780d41bbf2356/crates/pumpkin-plugin-api/src/events/inventory/furnace_extract.rs#L1-L21","documentation":"This panic fires in `data_from_event`, the `Event` trait implementation for `FurnaceExtractEvent`. It only accepts `Event::FurnaceExtractEvent(data)`; any other variant means the dispatcher delivered a mismatched event payload to this handler. The library treats that as an internal invariant violation and panics with \"unexpected event\".","triggerScenarios":"Passing an `Event` other than `Event::FurnaceExtractEvent` into `data_from_event`, e.g. other furnace or inventory events routed to this handler, or registration under the wrong `EventType`.","commonSituations":"Mixing up furnace event handlers (burn/smelt/extract) in registration tables, custom dispatch code, or version skew where the `Event` enum differs between server and plugin.","solutions":["Register the handler with `EventType::FurnaceExtractEvent` and confirm dispatch routes only that variant.","Build the event via `FurnaceExtractEvent::data_into_event(data)` before manual extraction.","Align plugin-api versions across the workspace and rebuild cleanly.","Pre-narrow: `if let Event::FurnaceExtractEvent(data) = event { ... }`.","Return `None`/log the mismatch instead of panicking."],"exampleFix":"// before\nmatch event {\n    Event::FurnaceExtractEvent(data) => data,\n    _ => panic!(\"unexpected event\"),\n}\n// after\nmatch event {\n    Event::FurnaceExtractEvent(data) => data,\n    _ => return None,\n}","handlingStrategy":"type-guard","validationCode":"// Before dispatch\nassert_eq!(event.event_type(), EventType::FurnaceExtractEvent, \"wrong event routed to FurnaceExtract handler\");","typeGuard":"fn as_furnace_extract(event: &Event) -> Option<&FurnaceExtractEventData> {\n    match event {\n        Event::FurnaceExtractEvent(data) => Some(data),\n        _ => None,\n    }\n}","tryCatchPattern":"let result = std::panic::catch_unwind(AssertUnwindSafe(|| handler.data_from_event(event)));\nif result.is_err() {\n    log::error!(\"FurnaceExtractEvent handler received an unexpected event variant\");\n}","preventionTips":["Register the handler under EventType::FurnaceExtractEvent only.","Pre-narrow events with if-let/matches! before extraction.","Use FurnaceExtractEvent::data_into_event to build Event values.","Keep server and plugin on the same pumpkin-plugin-api version.","Avoid copy-paste between furnace handler registrations without updating the EventType."],"tags":["rust","panic","event-dispatch","inventory"],"backgroundTag":"internal-invariant-violation","analyzedSha":"8d4639e25a57c15e47448ec327c780d41bbf2356","analyzedAt":"2026-09-09T15:32:22.916Z","contentChangedAt":"2026-09-09T15:32:22.916Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}