Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Cannot delete property '--' of #<Object> for lerna 3.18.4

See original GitHub issue

I exec lerna exec -- npm view \$LERNA_PACKAGE_NAME, then an error appears:

$ lerna -v
3.18.4
$ lerna exec -- npm view \$LERNA_PACKAGE_NAME
/<proj>/node_modules/yargs/yargs.js:1184
      else throw err
           ^

TypeError: Cannot delete property '--' of #<Object>
    at Object.Yargs.self._copyDoubleDash (/<proj>/node_modules/yargs/yargs.js:1196:5)
    at Object.parseArgs [as _parseArgs] (/<proj>/node_modules/yargs/yargs.js:1097:60)
    at Object.parse (/<proj>/node_modules/yargs/yargs.js:578:25)
    at main (/<proj>/node_modules/lerna/index.js:44:6)
    at Object.<anonymous> (/<proj>/node_modules/lerna/cli.js:11:15)
    at Module._compile (internal/modules/cjs/loader.js:956:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
    at Module.load (internal/modules/cjs/loader.js:812:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:849:19)

Expected Behavior

No error

Current Behavior

The error

Possible Solution

Maybe from yargs 14.2.1

Steps to Reproduce (for bugs)

create an empty respository
yarn init
yarn global add lerna
lerna exec – npm view $LERNA_PACKAGE_NAME

lerna.json

<!-- Please paste your `lerna.json` here -->
no lerna.json

lerna-debug.log

<!-- If you have a `lerna-debug.log` available, please paste it here -->
<!-- Otherwise, feel free to delete this <details> block -->
no lerna-debug.log

Context

Your Environment

Executable	Version
`lerna --version`	3.18.4
`npm --version`	6.11.3
`yarn --version`	1.12.1
`node --version`	v12.12.0

OS	Version
MacOS Mojave	10.14.6

Issue Analytics

State:
Created 4 years ago
Reactions:20
Comments:16 (2 by maintainers)

Top GitHub Comments

8reactions

joeycozzacommented, Nov 18, 2019

@samarpanB I tried downgrading lerna in my package.json to 3.17.0 , and it DID work for me. This is what that line looks like.

    "lerna": "3.17.0",

5reactions

Salakarcommented, Nov 19, 2019

Ditto,

Downgrading to the following works for me for now:

"lerna": "3.17.0",

Top Results From Across the Web

Javascript delete object property not working - Stack Overflow

If the object inherits a property from a prototype, and doesn't have the property itself, the property can't be deleted by referencing the...

TypeError: property "x" is non-configurable and can't be deleted

It was attempted to delete a property, but that property is non-configurable. The configurable attribute controls whether the property can be deleted from...

Unable to delete JS object property - Salesforce Developers

Hey, I'm trying to delete property on one of my objects, but I"m seein this error: Cannot delete property 'Field Name' of #<Object>...

Locker Service preventing delete of object properties

I'm experiencing Cannot delete property 'Owner' of [object Object] issue too from yesterday. – Praveen. Mar 11, 2017 at 5:12.

The Secret of the 'delete operator' - Better Programming

Non-configurable properties cannot be removed. const object = {};Reflect.defineProperty(object, 'name', ...