Removal of contract code (selfdestruct) was not reflected in hardhat 2.2.0

[NIC619]

I upgraded hardhat from 2.0.6 to 2.2.0 and ran into a problem where transaction that triggers a contract to selfdestruct succeeded (receipt.status == 1) but querying the dead contract's code still shows that the contract contains code (ethers.provider.getCode(CONTRACT_ADDRESS)).
Contract balance can be correctly updated however, but not the contract code.

To reproduce:

• contract code (modified from Greeter example)

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.7.0;

contract Greeter {

  constructor() payable {}

  function kill() public {
    selfdestruct(msg.sender);
  }

}

• test

const { expect } = require("chai");

describe("Greeter", function() {
  it("Should successfully update contract state after selfdestruct", async function() {
    const Greeter = await ethers.getContractFactory("Greeter");
    const greeter = await Greeter.deploy({value: 1000});
    await greeter.deployed();

    expect(await ethers.provider.getBalance(greeter.address)).to.equal(1000)
    expect(await ethers.provider.getCode(greeter.address)).to.not.equal("0x")
    await greeter.kill();
    expect(await ethers.provider.getBalance(greeter.address)).to.equal(0)
    expect(await ethers.provider.getCode(greeter.address)).to.equal("0x")
  });
});

Then install different versions of hardhat and run the test. So far I've tried 2.0.6, 2.0.10, 2.1.0, 2.1.2 and they all work fine. Only 2.2.0 fail.

[alcuadrado]

Hey @NIC619, thanks for reporting this bug and trying it with different versions! It was really helpful to understand what's going on. We are now working on a fix.

[fvictorio]

Thanks @NIC619, this should be fixed in hardhat@2.2.1.