Issue using debug in truffle develop

[eggplantzzz]

Issue

There is a problem trying to debug a transaction while using truffle develop

Steps to Reproduce

1. truffle unbox metacoin
2. truffle develop
3. At the prompt, run migrate
4. Run the following

const instance = await MetaCoin.deployed();
const result = await instance.sendCoin(accounts[0], 10);

5. Get the transaction hash from result and use it as an argument to debug

Expected Behavior

I expect the debugger to load the transaction for sendCoin

Actual Results

I receive a connection error.

> Something went wrong while attempting to connect to the network. Check your network configuration.

Could not connect to your Ethereum client with the following parameters:
    - host       > 127.0.0.1
    - port       > 7545
    - network_id > 5777
Please check that your Ethereum client:
    - is running
    - is accepting RPC connections (i.e., "--rpc" option is used in geth)
    - is accessible over the network
    - is properly configured in your Truffle configuration file (truffle-config.js)

Environment

• Operating System: mac
• Truffle v5.1.36 (core: 5.1.36)
• Solidity v0.5.16 (solc-js)
• Node v10.20.1
• Web3.js v1.2.1

[haltman-at]

Hm, I wonder if this is due to what @gnidan, @fainashalts, and @cds-amal are working on. Like, I wonder if it's trying to connect to the wrong network due to not inheriting the config properly?

[gnidan]

Hm, very strange. I don't think it's related to that work @haltman-at, but it's definitely something with the debugger not getting the correct config - since develop runs on port 9545, that error's a clear giveaway that something's wrong.

I don't suppose this is related to that change you made to the debugger's --network flag default, @haltman-at?

[haltman-at]

I mean, I got rid of the default. It now uses whatever means Truffle normally uses to determine the default network.

[fainashalts]

Interesting! I don't believe the issue I'm dealing with is related, but I'll keep my eyes peeled in case it is!

[gnidan]

Hm well this used to work, since I used this exact process to test the debugger all the time. Might be worth figuring out the first version it was broken, to check the changelog.

[eggplantzzz]

When no network config is provided, Environment.detect sets the default port to 7545 here. I'm going to say the solution is to set this to 9545.

[haltman-at]

So, did #3319 fix this? I don't know whether to close this or not.

[eggplantzzz]

Looks like this is good on Truffle 5.1.44