Subscribe to logs is broken in beta.49+

[csokun]

Description

Subscribe to logs is broken in beta.49+

Expected behavior

I should be able to subscribe to logs from specified block and specified topics.

Actual behavior

An exception is thrown

Steps to reproduce the behavior

const Web3 = require('web3');
const web3 = new Web3("ws://localhost:8546");

web3.eth.subscribe('logs', { fromBlock: 479095 }, (err, result) => {
  console.log(err, result);
});

Error Logs

TypeError: Cannot read property 'currentProvider' of undefined
    at GetPastLogsMethod._callee$ (/home/sokun/labs/web3js1Test/node_modules/web3-core-method/dist/web3-core-method.cjs.js:97:44)
    at tryCatch (/home/sokun/labs/web3js1Test/node_modules/regenerator-runtime/runtime.js:45:40)
    at Generator.invoke [as _invoke] (/home/sokun/labs/web3js1Test/node_modules/regenerator-runtime/runtime.js:271:22)
    at Generator.prototype.(anonymous function) [as next] (/home/sokun/labs/web3js1Test/node_modules/regenerator-runtime/runtime.js:97:21)
    at asyncGeneratorStep (/home/sokun/labs/web3js1Test/node_modules/@babel/runtime/helpers/asyncToGenerator.js:3:24)
    at _next (/home/sokun/labs/web3js1Test/node_modules/@babel/runtime/helpers/asyncToGenerator.js:25:9)
    at /home/sokun/labs/web3js1Test/node_modules/@babel/runtime/helpers/asyncToGenerator.js:32:7
    at new Promise (<anonymous>)
    at GetPastLogsMethod.<anonymous> (/home/sokun/labs/web3js1Test/node_modules/@babel/runtime/helpers/asyncToGenerator.js:21:12)
    at GetPastLogsMethod.execute (/home/sokun/labs/web3js1Test/node_modules/web3-core-method/dist/web3-core-method.cjs.js:122:25)
    at LogSubscription.subscribe (/home/sokun/labs/web3js1Test/node_modules/web3-core-subscriptions/dist/web3-core-subscriptions.cjs.js:106:32)
    at Proxy.subscribe (/home/sokun/labs/web3js1Test/node_modules/web3-eth/dist/web3-eth.cjs.js:425:77)
    at Object.<anonymous> (/home/sokun/labs/web3js1Test/index.js:4:10)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32) null

Versions

• web3.js: 1.0.0-beta.49+
• nodejs: v8.14.0
• browser: NA
• ethereum node: geth v1.8.20