eth.clearSubscriptions gives error if no running subscriptions do exist

[prographo]

This call should never give an error.

https://web3js.readthedocs.io/en/v1.2.0/web3-eth-subscribe.html#clearsubscriptions

web3.eth.clearSubscriptions()

Gives this error:

    Object.keys(this.subscriptions).forEach(function(id){
           ^

TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)

run this:

const ep = 'wss://goerli.infura.io/ws/v3/<XXX>'
const Web3 = require('web3')
const web3ws = new Web3(
  new Web3.providers.WebsocketProvider( ep )
)
web3ws.eth.clearSubscriptions()

[nivida]

Thanks for opening this issue! This does only happen if no subscription is running.