helderjnpinto

Solving “Stack too deep” Errors in Solidity EVM

This error typically occurs when a function has too many local variables, and the Ethereum Virtual Machine (EVM) imposes a limit on the number of variables that can be pushed onto the stack.

Here the follows investigation that I made today.

References of some examples are given here:

helderjnpinto

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// tx costs when reverts + deployed tx cost

// deployed gas cost 202596
contract Error {
    uint num = 0;

    // transaction cost	21910 gas 

helderjnpinto

#pragma version 8

if Txn.ApplicationID == 0:
    # Handle Create App
    exit(1)
end

switch Txn.OnCompletion:
    NoOp: main
    OptIn: opt_in

helderjnpinto

use std::collections::HashMap;
use std::io::{ self, Read, Write };
use std::net::{ TcpListener, TcpStream };
use std::sync::{ Arc, Mutex };
use std::thread;

#[derive(Clone)]
struct Broker {
    subscribers: HashMap<String, Vec<Arc<Mutex<TcpStream>>>>,
}

helderjnpinto

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.4;

contract SimpleAuction {
    address payable public beneficiary;
    uint public auctionEndTime;

    address public highestBidder;
    uint public highestBid;

helderjnpinto

pid,query
218,"SELECT a0.""id"", a0.""name"", a0.""primary"", a0.""metadata"", a0.""address_hash"", a0.""inserted_at"", a0.""updated_at"", a0.""address_hash"" FROM ""address_names"" AS a0 WHERE (a0.""address_hash"" = $1) ORDER BY a0.""address_hash"""
210,"SELECT t0.""hash"", t0.""block_number"", t0.""cumulative_gas_used"", t0.""earliest_processing_start"", t0.""error"", t0.""gas"", t0.""gas_price"", t0.""gas_used"", t0.""index"", t0.""created_contract_code_indexed_at"", t0.""input"", t0.""nonce"", t0.""r"", t0.""s"", t0.""status"", t0.""v"", t0.""value"", t0.""revert_reason"", t0.""max_priority_fee_per_gas"", t0.""max_fee_per_gas"", t0.""type"", t0.""has_error_in_internal_txs"", t0.""old_block_hash"", t0.""inserted_at"", t0.""updated_at"", t0.""block_hash"", t0.""from_address_hash"", t0.""to_address_hash"", t0.""created_contract_address_hash"", t0.""block_hash"" FROM ""transactions"" AS t0 WHERE (t0.""block_hash"" = $1) ORDER BY t0.""block_hash"""
225,"SELECT a0.""hash"", a0.""fetched_coin_balance"", a0.""fet

helderjnpinto

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

helderjnpinto

  # Docker-in-Docker Gitlab runners setup taken from:
  # https://medium.com/@tonywooster/docker-in-docker-in-gitlab-runners-220caeb708ca
  dind:
    restart: always
    privileged: true
    volumes:
    - /var/lib/docker
    image: docker:17.09.0-ce-dind
    command: 
    - --storage-driver=overlay2

helderjnpinto

 Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok         
  Block Sequential    : ok         

helderjnpinto

FAILURE: 0x76ffa13a12f7ec54 != 0x76ffa13a12f5ec54 at offset 0xa1d1b230.
FAILURE: 0x76ffa13a12f7ec55 != 0x76ffa13a12c7ec55 at offset 0xa1d1b238.
FAILURE: 0x76ffa13a12f7ec57 != 0x76ffa13a12ffec57 at offset 0xa1d1b248.
FAILURE: 0x76ffa13a12f7ec59 != 0x76ffa13a12e6ec59 at offset 0xa1d1b258.
FAILURE: 0x76ffa13a12f7ec5b != 0x76ffa13a12faec5b at offset 0xa1d1b268.
FAILURE: 0x76ffa13a12f7ec5d != 0x76ffa13a1267ec5d at offset 0xa1d1b278.
FAILURE: 0x76ffa13a12f7ec5f != 0x76ffa13a12dfec5f at offset 0xa1d1b288.
FAILURE: 0x76ffa13a12f7ec60 != 0x76ffa13a12f5ec60 at offset 0xa1d1b290.
FAILURE: 0x76ffa13a12f7ec61 != 0x76ffa13a1266ec61 at offset 0xa1d1b298.
FAILURE: 0x76ffa13a12f7ec62 != 0x76ffa13a12f5ec62 at offset 0xa1d1b2a0.