{"record":{"id":"f17c6aa3a01401fa","repo":"jackwener/OpenCLI","slug":"failed-to-fetch-barchart-greeks-for-symbol","errorCode":null,"errorMessage":"Failed to fetch Barchart greeks for ${symbol}","messagePattern":"Failed to fetch Barchart greeks for (.+?)","errorType":"exception","errorClass":"CommandExecutionError","httpStatus":null,"severity":"error","filePath":"clis/barchart/greeks.js","lineNumber":168,"sourceCode":"              };\n            })\n          };\n        } catch(e) {\n          return { ok: false, reason: 'exception', message: e?.message || String(e) };\n        }\n      })()\n    `));\n        if (!data || data.ok !== true) {\n            if (data?.reason === 'http') {\n                throw new CommandExecutionError(`Barchart greeks request failed: HTTP ${data.status}${data.statusText ? ` ${data.statusText}` : ''}`);\n            }\n            if (data?.reason === 'malformed') {\n                throw new CommandExecutionError(`Barchart greeks returned an unreadable options payload${data.message ? `: ${data.message}` : ''}`);\n            }\n            if (data?.reason === 'exception') {\n                throw new CommandExecutionError(`Barchart greeks request failed: ${data.message || 'unknown error'}`);\n            }\n            throw new CommandExecutionError(`Failed to fetch Barchart greeks for ${symbol}`);\n        }\n        if (!Array.isArray(data.rows)) {\n            throw new CommandExecutionError('Barchart greeks returned an unreadable options payload');\n        }\n        if (data.rows.length === 0) {\n            throw new EmptyResultError('barchart greeks', `No option greeks were returned for ${symbol}. Confirm the symbol, expiration, and Barchart login state.`);\n        }\n        return data.rows.map(r => {\n            if (!r || typeof r !== 'object' || Array.isArray(r)) {\n                throw new CommandExecutionError('Barchart greeks returned a malformed option row');\n            }\n            const type = String(r.type || '').trim();\n            const expirationValue = String(r.expiration || '').trim();\n            if (!/^(call|put)$/i.test(type) || r.strike === undefined || r.strike === null || r.strike === '' || !expirationValue) {\n                throw new CommandExecutionError('Barchart greeks returned a malformed option row identity');\n            }\n            return {\n                type,","sourceCodeStart":150,"sourceCodeEnd":186,"githubUrl":"https://github.com/jackwener/OpenCLI/blob/49907e53dc3ade5c223ff0c4c2c2785687cec4e6/clis/barchart/greeks.js#L150-L186","documentation":"This fallback CommandExecutionError is thrown when the greeks envelope reports ok !== true but none of the known reasons ('http', 'malformed', 'exception') matched — an unexpected envelope shape. The requested symbol is interpolated into the message to aid debugging. It indicates an unrecognized failure mode from the browser evaluation layer.","triggerScenarios":"The browser evaluation returned a falsy value (data undefined/null) or an object with ok !== true and no recognized reason field — e.g. the script's returned expression evaluated to undefined because the IIFE returned nothing, or unwrapBrowserResult got an unexpected shape.","commonSituations":"Browser context returning undefined after a silent script failure or page navigation; a version mismatch where the wrapper script no longer emits the expected {ok, reason} envelope; premature page close discarding the return value; editing the in-page script so its return path was dropped.","solutions":["Run the command with verbose/debug output if available to inspect the raw browser-evaluation return value.","Re-run the command once — transient navigation/timing issues often produce undefined returns.","Verify the browser session and page load: open the greeks page manually to confirm it loads for your session.","If you modified the evaluation script, restore its return path so it always resolves to { ok: true, rows } or a { ok:false, reason } envelope."],"exampleFix":"// before\nreturn; // early return yields undefined -> 'Failed to fetch ...'\n// after\nreturn { ok: false, reason: 'malformed', message: 'no rows container found' };","handlingStrategy":"fallback","validationCode":"// Ensure the evaluation layer always returns a recognized envelope\nconst raw = await browserEval(script);\nif (raw === undefined || raw === null) {\n  console.warn('Browser evaluation returned nothing — page may have navigated away');\n}","typeGuard":"function hasKnownReason(v) {\n  return v !== null && typeof v === 'object' && typeof v.ok === 'boolean' &&\n    (v.ok || ['http', 'malformed', 'exception'].includes(v.reason));\n}","tryCatchPattern":"async function safeGreeks(symbol) {\n  try {\n    return await greeks({ symbol });\n  } catch (e) {\n    if (e.message.startsWith('Failed to fetch Barchart greeks')) {\n      await new Promise(r => setTimeout(r, 3000));\n      return greeks({ symbol }); // one retry; transient undefined returns are common\n    }\n    throw e;\n  }\n}","preventionTips":["Always return a { ok, reason|rows } envelope from evaluation scripts — never undefined","Retry once on this fallback error; it is often a transient timing/navigation issue","Keep the wrapper script and in-page script versions in sync"],"tags":["barchart","browser-automation","unknown-state","scraping"],"backgroundTag":"unknown-failure-mode","analyzedSha":"49907e53dc3ade5c223ff0c4c2c2785687cec4e6","analyzedAt":"2026-08-29T08:14:47.543Z","schemaVersion":2},"datasetVersion":"2026-08-29T12:17:43.993Z"}