Migration only save the first deployed smart contract.

[Pedro-vk]

• I've asked for help in the Truffle Gitter before filing this issue.

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Issue

My migration deploys a few contracts in a row. The JSON files get created with ABI and bytecode, but only the first contract deployed gets the deployed address saved under the network in the artefacts.

Steps to Reproduce

Run a migration of that:

var FirstContract = artifacts.require("./FirstContract.sol");
var SecondContract = artifacts.reqre("./SecondContract.sol");

module.exports = async function (deployer, helper, accounts)  {
  try {
    await deployer.deploy(FirstContract)
    let firstContract = await FirstContract.deployed()

    await deployer.deploy(SecondContract, firstContract.address)
    let secondContract = await SecondContract.deployed()
  } catch (error) {
    console.log(error)
  }
}

Expected Behavior

FirstContract and SecondContract must have the network parameter written, with the address where have been deployed.

Actual Results

Check the result of the FirstContract and SecondContract, only FirstContract have written the network parameter.

Environment

• Operating System: Ubuntu 16.04
• Ethereum client: Ganache v1.1.0-beta.1 and Ropsten network throught infura.
• Truffle version (truffle version): 4.1.5 and 4.1.3
• node version (node --version): 9.5.0
• npm version (npm --version): 5.8.0

[cgewecke]

@Pedro-vk Thanks for opening - this is a duplicate of #501.

The way async/await integrates with the migrations feature is confusing for a lot of users. truffle-migrate was written before await became common and it stages deployments as 'thennables' rather than executing them as true promises. See this comment for advice about how to resolve.