Winston: "Cannot read property 'levels' of undefined" when Logger created without arguments #117
Description
I have a node-based project running as a linux Azure App Service (with Application Insights enabled).
In my application, when winston is initiated without a config object:
const winston = require('winston')
const logger = winston.createLogger() // fails
module.exports = loggerIt fails:
[INFO] _____
[INFO] / _ \ __________ _________ ____
[INFO] / /_\ \___ / | \_ __ \_/ __ \
[INFO] / | \/ /| | /| | \/\ ___/
[INFO] \____|__ /_____ \____/ |__| \___ >
[INFO] \/ \/ \/
[INFO] A P P S E R V I C E O N L I N U X
[INFO]
[INFO] Documentation: http://aka.ms/webapp-linux
[INFO] NodeJS quickstart: https://aka.ms/node-qs
[INFO] NodeJS Version : v16.8.0
[INFO]
[ERROR] /agents/node/node_modules/diagnostic-channel-publishers/dist/src/winston.pub.js:116
[ERROR] var levels = arguments[0].levels || originalWinston.config.npm.levels;
[ERROR] ^
[ERROR]
[ERROR] TypeError: Cannot read property 'levels' of undefined
[ERROR] at Object.patchedCreate [as createLogger] (/agents/node/node_modules/diagnostic-channel-publishers/dist/src/winston.pub.js:116:35)
[ERROR] at Object.<anonymous> (/home/site/wwwroot/server/utils/logger.js:19:24)
[ERROR] at Module._compile (node:internal/modules/cjs/loader:1101:14)
[ERROR] at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
[ERROR] at Module.load (node:internal/modules/cjs/loader:981:32)
[ERROR] at Function.Module._load (node:internal/modules/cjs/loader:822:12)
[ERROR] at Module.require (node:internal/modules/cjs/loader:1005:19)
[ERROR] at Module.patchedRequire [as require] (/agents/node/node_modules/diagnostic-channel/dist/src/patchRequire.js:15:46)
[ERROR] at require (node:internal/modules/cjs/helpers:94:18)
[ERROR] at Object.<anonymous> (/home/site/wwwroot/server/router/api.js:4:16)
[ERROR] npm info lifecycle my-app@1.0.0~start: Failed to exec start script
[ERROR] npm ERR! code ELIFECYCLE
[ERROR] npm ERR! errno 1
[ERROR] npm ERR! my-app@1.0.0 start: `node server.js`
[ERROR] npm ERR! Exit status 1
[ERROR] npm ERR!
[ERROR] npm ERR! Failed at the my-app@1.0.0 start script.
[ERROR] npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
Even though passing nothing is considered valid by Winston: https://github.com/winstonjs/winston/blob/master/index.d.ts#L184
// index.d.ts
let createLogger: (options?: LoggerOptions) => Logger;Works correctly if empty object {} supplied as argument to createLogger:
const winston = require('winston')
const logger = winston.createLogger({}) // succeeds
module.exports = logger