# Ethereum devs cancel Glamsterdam testnet upgrade over gas bug

> Ethereum core devs pull Glamsterdam testnet activation after gas bug risks breaking 13 live smart contracts.
- Title: Ethereum devs cancel Glamsterdam testnet upgrade over gas bug
- Summary: Ethereum core devs pull Glamsterdam testnet activation after gas bug risks breaking 13 live smart contracts. Ethereum developers canceled a testnet upgrade…
- Keywords: ethereum, glamsterdam, eip-8037, eip-8038, gas bug, smart contracts, chainsecurity, testnet, ethereum developers, gas accounting, startups, business
- Source: Startup Fortune — https://startupfortune.com/ethereum-developers-pull-glamsterdam-testnet-upgrade-over-gas-bug-risk
- Published: 2026-10-28T20:11:23+00:00
- Read time: 1 min
- Topics: ethereum, glamsterdam, eip-8037, eip-8038, gas bug, smart contracts, chainsecurity, testnet, ethereum developers, gas accounting, startups, business
## Ethereum core developers cancel testnet activation
Ethereum developers canceled Glamsterdam hard fork activation on Hoodi testnet scheduled for October 26.
## ChainSecurity flags gas accounting risk
ChainSecurity found EIP-8037 and EIP-8038 could permanently break 13 live smart contracts.
## Gas accounting bug details
Gas that should be lost when a transaction fails flows back into contracts, letting them run permanently.
## Real-world impact
The bug affects 13 live contracts holding user funds that would behave differently upon activation.
## Why this is different
This is the first time Ethereum's core dev process pulled a testnet activation over a specific technical finding.
## Glamsterdam upgrade details
Glamsterdam aims to increase Ethereum's gas capacity from 60 million to 200 million per block.
## Consequence for Ethereum
Fixing the bug requires coordinated work from developers, auditors, and node operators, delaying mainnet rollout.
## Key takeaway

Ethereum developers canceled a testnet upgrade due to a gas accounting bug that could permanently break 13 live smart contracts.