Ganache crashes when running truffle debug

[wesleyfsmith]

I am running ganache 1.3

My test code appears to run successfully, and I am able to see the transaction appear in ganache. However, when I run truffle debug txId I get the following error:

RangeError: Invalid string length
    at JSON.stringify (<anonymous>)
    at /node_modules/ganache-core/lib/httpServer.js:103:57
    at Object.intermediary [as callback] (/node_modules/ganache-core/lib/provider.js:114:5)
    at self.engine.sendAsync (/node_modules/ganache-core/lib/provider.js:169:12)
    at /node_modules/ganache-core/node_modules/web3-provider-engine/index.js:152:9
    at /node_modules/ganache-core/node_modules/async/internal/once.js:12:16
    at replenish (/node_modules/ganache-core/node_modules/async/internal/eachOfLimit.js:61:25)
    at /node_modules/ganache-core/node_modules/async/internal/eachOfLimit.js:71:9
    at eachLimit (/node_modules/ganache-core/node_modules/async/eachLimit.js:43:36)
    at /node_modules/ganache-core/node_modules/async/internal/doLimit.js:9:16
    at Object.end [as callback] (/node_modules/ganache-core/node_modules/web3-provider-engine/index.js:127:5)
    at intermediary (/node_modules/ganache-core/lib/statemanager.js:401:12)
    at /node_modules/ganache-core/lib/blockchain_double.js:900:11
    at /node_modules/ganache-core/lib/blockchain_double.js:649:9
    at commmitIfNeeded (/node_modules/ganache-core/lib/blockchain_double.js:640:11)
    at /node_modules/ganache-core/lib/blockchain_double.js:644:7
    at /node_modules/ganache-core/node_modules/async/internal/once.js:12:16
    at replenish (/node_modules/ganache-core/node_modules/async/internal/eachOfLimit.js:61:25)
    at /node_modules/ganache-core/node_modules/async/internal/eachOfLimit.js:71:9
    at eachLimit (/node_modules/ganache-core/node_modules/async/eachLimit.js:43:36)
    at /node_modules/ganache-core/node_modules/async/internal/doLimit.js:9:16
    at VM.AsyncEventEmitter.emit (/node_modules/ganache-core/node_modules/async-eventemitter/lib/AsyncEventEmitter.js:42:3)

This error occurs when debugging any transaction and causes ganache to crash.

Currently running macOS Mojave 10.14

[eshaben]

Possibly related to /issues/630

[wesleyfsmith]

I originally thought that it might be because I was using the experimental abi encoder, but I refactor my code to no longer use the experimental abi, and I still am getting this issue on some of my transactions.

[davidmurdoch]

@wesleyfsmith Is it possible for you to provide reproduction steps?

[inukaeth]

I am hitting the same issue.

In my case my contract is large and I am running Ganache with allowUnlimitedContractSize:true. This maybe a contributing factor.

Ganache version 2.0.1
Truffle version:
Truffle v5.0.25 (core: 5.0.25)
Solidity v0.5.0 (solc-js)
Node v8.11.2
Web3.js v1.0.0-beta.37

Thanks

[nicholasjpaterno]

@inukaeth Have you tried adjusting the block gasLimit? Its a common issue (not a bug) with allowUnlimitedContractSize where users are attempting to deploy with greater gas requirements than the current block limit.

[davidmurdoch]

@inukaeth if adjusting the gasLimit doesn't work for you could provide reproduction steps/repo here so we can track down the issue?

[davidmurdoch]

I believe this happens when the data ganache attempts to send back to the client is too large for the current node process to JSON.stringify; it just runs out of available memory. One way to solve this is to start the ganache server process with more memory (--max-old-space-size=8192), another is for ganache to implement #381 and from truffle debug to use it.

[dkelsen]

Getting this error as well and I'm working on a mainnet fork.

    at JSON.stringify (<anonymous>)
    at /Users/dilshan/.nvm/versions/node/v14.15.1/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:94:95383
    at /Users/dilshan/.nvm/versions/node/v14.15.1/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:42:14963
    at processTicksAndRejections (internal/process/task_queues.js:75:11)

[gnidan]

Node.js has a hard limit on the size of strings, that might be the problem here. @davidmurdoch also reports that JSON.stringify has its own string length limit. Could anyone here provide more precise reproduction steps?

Barring that, we can probably see about reproducing this error by attempting to debug_traceTransaction on a transaction ≥6M gas or so.

If the problem here is with JSON.stringify itself and not Node's unavoidable limit, @davidmurdoch reports a possible solution he found here.

Thanks all! Hopefully we'll be able to sort this one out.

[Gdocal]

I get this issue often. I use brownie + ganache-cli, when tx reverts (gas usage: 2m) brwonie sends debug_traceTransaction, and ganache crashes after this

file ganache-core.node.cli.js
switch (o) { case "POST": var d; try { d = JSON.parse(f); } catch (e) { return (s["Content-Type"] = "text/plain"), void c(n, 400, s, "400 Bad Request"); } if (d instanceof Array) for (var u = 0; u < d.length; u++) { var b = d[u]; t.log(b.method); } else t.log(d.method); if ("eth_subscribe" === d.method || "eth_unsubscribe" === d.method) { (s["Content-Type"] = "application/json"), c(n, 400, s, a(d.id, -32e3, "notifications not supported")); break; } e.send(d, function (e, t) { (s["Content-Type"] = "application/json"), c(n, 200, s, JSON.stringify(t)); //<---------------- CRASHED HERE }); break; case "OPTIONS": c(n, 204, s); break; default: (s["Content-Type"] = "text/plain"), c(n, 400, s, "400 Bad Request"); } });

[jeffywu]

Is this where the provider returns data to the client?

https://github.com/trufflesuite/ganache-core/blob/6ec151bca2a4f3c7815869529b507333fe1611c5/src/chains/ethereum/ethereum/src/provider.ts#L214

Wondering if it would be feasible to use JSONStream there instead of JSON.stringify, but I can't say that I'm very familiar with how the code works.
https://www.npmjs.com/package/JSONStream

[davidmurdoch]

Fixed in v7! See https://github.com/trufflesuite/ganache/releases/tag/v7.0.0#user-content-v7.0.0-highlights-4 for details!