{"record":{"id":"7962137ed6aec587","repo":"Hmbown/CodeWhale","slug":"lane-child-stderr-was-not-piped","errorCode":null,"errorMessage":"lane child stderr was not piped","messagePattern":"lane child stderr was not piped","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/lane/src/runtime.rs","lineNumber":485,"sourceCode":"    child_command.args(&command[1..]);\n    child_command.envs(environment);\n    child_command.stdout(Stdio::piped()).stderr(Stdio::piped());\n    let mut child = match child_command.spawn() {\n        Ok(child) => child,\n        Err(error) => {\n            return fail(\n                anyhow::Error::from(error).context(format!(\"spawn lane child command {command:?}\")),\n                127,\n            );\n        }\n    };\n    let stdout = match child.stdout.take() {\n        Some(stdout) => stdout,\n        None => return fail(anyhow::anyhow!(\"lane child stdout was not piped\"), 125),\n    };\n    let stderr = match child.stderr.take() {\n        Some(stderr) => stderr,\n        None => return fail(anyhow::anyhow!(\"lane child stderr was not piped\"), 125),\n    };\n    let stdout_log = log_path.clone();\n    let stderr_log = log_path.clone();\n    let stdout_thread = thread::spawn(move || stream_child_output(stdout, stdout_log, \"stdout\"));\n    let stderr_thread = thread::spawn(move || stream_child_output(stderr, stderr_log, \"stderr\"));\n\n    let status = match child.wait() {\n        Ok(status) => status,\n        Err(error) => {\n            return fail(\n                anyhow::Error::from(error).context(format!(\"wait for lane child {command:?}\")),\n                LANE_PROXY_FAILURE_EXIT_CODE,\n            );\n        }\n    };\n    let stdout_result = stdout_thread\n        .join()\n        .map_err(|_| anyhow::anyhow!(\"lane proxy stdout logger panicked\"))?;","sourceCodeStart":467,"sourceCodeEnd":503,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/8880682c63083a91624de936797efa3ce9e498fd/crates/lane/src/runtime.rs#L467-L503","documentation":"Error \"lane child stderr was not piped\" thrown in Hmbown/CodeWhale.","triggerScenarios":"Thrown at crates/lane/src/runtime.rs:485 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":"8880682c63083a91624de936797efa3ce9e498fd","analyzedAt":"2026-08-16T11:31:27.956Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}