{"record":{"id":"bd6805b259eaf9cf","repo":"astral-sh/ruff","slug":"failed-to-send-response-for-request-id-error","errorCode":null,"errorMessage":"Failed to send response for request {id}: {error}","messagePattern":"Failed to send response for request (.+?): (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/ruff_server/src/session/client.rs","lineNumber":147,"sourceCode":"    /// and checked for cancellation (each request must have exactly one response).\n    pub(crate) fn respond<R>(\n        &self,\n        id: &RequestId,\n        result: crate::server::Result<R>,\n    ) -> crate::Result<()>\n    where\n        R: serde::Serialize,\n    {\n        let response = match result {\n            Ok(res) => lsp_server::Response::new_ok(id.clone(), res),\n            Err(crate::server::Error { code, error }) => {\n                lsp_server::Response::new_err(id.clone(), code as i32, error.to_string())\n            }\n        };\n\n        self.main_loop_sender\n            .send(Event::SendResponse(response))\n            .map_err(|error| anyhow!(\"Failed to send response for request {id}: {error}\"))\n    }\n\n    /// Sends an error response to the client for a given request ID.\n    ///\n    /// The response isn't sent immediately. Instead, it's queued up in the main loop.\n    pub(crate) fn respond_err(\n        &self,\n        id: RequestId,\n        error: lsp_server::ResponseError,\n    ) -> crate::Result<()> {\n        let response = lsp_server::Response {\n            id,\n            response_result: Err(error),\n        };\n\n        self.main_loop_sender\n            .send(Event::SendResponse(response))\n            .map_err(|error| anyhow!(\"Failed to send response: {error}\"))","sourceCodeStart":129,"sourceCodeEnd":165,"githubUrl":"https://github.com/astral-sh/ruff/blob/672bb4edf04c84f8b0753346359daee4057158f2/crates/ruff_server/src/session/client.rs#L129-L165","documentation":"Error \"Failed to send response for request {id}: {error}\" thrown in astral-sh/ruff.","triggerScenarios":"Thrown at crates/ruff_server/src/session/client.rs:147 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"672bb4edf04c84f8b0753346359daee4057158f2","analyzedAt":"2026-08-16T08:54:05.464Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}