{"record":{"id":"8debeeb6ad164ff5","repo":"Pumpkin-MC/Pumpkin","slug":"failed-to-decode-packet-id","errorCode":null,"errorMessage":"failed to decode packet ID","messagePattern":"failed to decode packet ID","errorType":"exception","errorClass":"PacketDecodeError","httpStatus":null,"severity":"error","filePath":"crates/pumpkin-protocol/src/lib.rs","lineNumber":301,"sourceCode":"\npub trait BServerPacket: Packet + Sized {\n    fn read(read: impl Read) -> Result<Self, Error>;\n}\n\n/// Errors that can occur during packet encoding.\n#[derive(Error, Debug)]\npub enum PacketEncodeError {\n    #[error(\"Packet exceeds maximum length: {0}\")]\n    TooLong(usize),\n    #[error(\"Compression failed {0}\")]\n    CompressionFailed(String),\n    #[error(\"Writing packet failed: {0}\")]\n    Message(String),\n}\n\n#[derive(Error, Debug)]\npub enum PacketDecodeError {\n    #[error(\"failed to decode packet ID\")]\n    DecodeID,\n    #[error(\"packet exceeds maximum length\")]\n    TooLong,\n    #[error(\"packet length is out of bounds\")]\n    OutOfBounds,\n    #[error(\"malformed packet length VarInt: {0}\")]\n    MalformedLength(String),\n    #[error(\"failed to decompress packet: {0}\")]\n    FailedDecompression(String), // Updated to include error details\n    #[error(\"packet is uncompressed but greater than the threshold\")]\n    NotCompressed,\n    #[error(\"the connection has closed\")]\n    ConnectionClosed,\n    #[error(\"{0}\")]\n    Message(String),\n}\n\nimpl From<ReadingError> for PacketDecodeError {","sourceCodeStart":283,"sourceCodeEnd":319,"githubUrl":"https://github.com/Pumpkin-MC/Pumpkin/blob/8d4639e25a57c15e47448ec327c780d41bbf2356/crates/pumpkin-protocol/src/lib.rs#L283-L319","documentation":"`PacketDecodeError::DecodeID` is returned when the incoming packet's ID VarInt could not be read — the very first field of every framed packet. Failure here means the stream is empty, truncated, or desynchronized before any packet content was parsed.","triggerScenarios":"Reading a packet from a stream that closed/ended mid-frame; a corrupted length field causing a short read; reading from an already-closed connection.","commonSituations":"Client disconnecting abruptly; network interruption mid-packet; a prior decode error leaving the reader at the wrong offset.","solutions":["Treat as a connection-level failure: close and clean up the session.","Check whether a previous decode error desynchronized the stream; resync or reconnect.","Verify the framing (length prefix) is being consumed correctly before the ID read.","Log the connection state to distinguish clean disconnects from corruption."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"match read_packet(&mut reader) {\n    Ok(p) => handle(p),\n    Err(PacketDecodeError::DecodeID) | Err(PacketDecodeError::OutOfBounds) => {\n        log::info!(\"stream ended or desynced; closing connection\");\n    }\n    Err(e) => return Err(e.into()),\n}","preventionTips":["Treat any ID-decode failure as fatal for that connection.","Never resume parsing after a failed frame; resync via reconnect.","Validate the length prefix against remaining buffer before reading."],"tags":["protocol","deserialization","network","packet-decoding"],"backgroundTag":"unexpected-response-shape","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"}