Error formats incorrectly

The error formatter example describes that it will log:

// Error: Oh no!
//     at repl:1:13
//     at ContextifyScript.Script.runInThisContext (vm.js:50:33)
//     at REPLServer.defaultEval (repl.js:240:29)
//     at bound (domain.js:301:14)
//     at REPLServer.runBound [as eval] (domain.js:314:12)
//     at REPLServer.onLine (repl.js:468:10)
//     at emitOne (events.js:121:20)
//     at REPLServer.emit (events.js:211:7)
//     at REPLServer.Interface._onLine (readline.js:282:10)
//     at REPLServer.Interface._line (readline.js:631:8)

Whereas it really logs: { level: undefined, message: 'Oh no!', stack: 'Error: Oh no!\n at Object.<anonymous> (C:\\Users\\Fennec\\Documents\\errlog.js:6:37)\n at Module._compile (internal/modules/cjs/loader.js:688:30)\n at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)\n at Module.load (internal/modules/cjs/loader.js:598:32)\n at tryModuleLoad (internal/modules/cjs/loader.js:537:12)\n at Function.Module._load (internal/modules/cjs/loader.js:529:3)\n at Function.Module.runMain (internal/modules/cjs/loader.js:741:12)\n at startup (internal/bootstrap/node.js:285:19)\n at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)', [Symbol(level)]: undefined, [Symbol(message)]: 'Oh no!' }

[AddoSolutions]

Same issue here.

Using t he exact code from the docs:

const { format } = require('logform');
const { errors } = format;
 
const errorsFormat = errors({ stack: true })
 
const info = errorsFormat.transform(new Error('Oh no!'));
 
console.log(info);

you get:

module.exports = format((einfo, { stack }) => {
                                  ^

TypeError: Cannot destructure property 'stack' of 'undefined' as it is undefined.
    at Format.transform (/Users/user/Sites/project/node_modules/logform/errors.js:14:35)
    at Object.<anonymous> (/Users/user/Sites/project/src/logger.js:104:27)
    at Module._compile (internal/modules/cjs/loader.js:1201:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1221:10)
    at Module.load (internal/modules/cjs/loader.js:1050:32)
    at Function.Module._load (internal/modules/cjs/loader.js:938:14)
    at Module.require (internal/modules/cjs/loader.js:1090:19)
    at require (internal/modules/cjs/helpers.js:75:18)
    at Object.<anonymous> (/Users/user/Sites/project/index.js:4:16)
    at Module._compile (internal/modules/cjs/loader.js:1201:30)

[opitzmic]

Ran into the same issue just now.

With winston 3.3.3, the following does not work as expected:

const winston = require('winston')

const logger = winston.createLogger({
  transports: [
    new winston.transports.Console({
      format: winston.format.errors(),
    })
  ]
})

logger.error(new Error('I am Error')) // Prints `{"level":"error"}`

Looks like the error properties get dropped when doing Object.assign({}, info) in winston-transport/index.js, line 91

There’s a workaround: Apply the errors format before passing the log message to the transports:

const winston = require('winston')

const logger = winston.createLogger({
  format: winston.format.errors(),
  transports: [
    new winston.transports.Console()
  ]
})

logger.error(new Error('I am Error')) // Prints `I am Error`