Impact Score: 5/10
Cypress: 4.12.1
Source available — automated, not human-reviewed
Component: cypress · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
Cypress v4.12.1. Source highlight: The error `Cannot set property 'err' of undefined` will no longer incorrectly throw when rerunning tests in the Test Runner. Fixes #7874.
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
🔧 Bug Fixes & Patches (2)
- The error `Cannot set property 'err' of undefined` will no longer incorrectly throw when rerunning tests in the Test Runner. Fixes #7874.
- Skipping the last test before a nested suite with a `before` hook will now correctly run the tests in the suite following the skipped test. Fixes #8086.
📄 View Raw Release Notes (Original Developer Log)
*Released 8/5/2020*
**Bugfixes:**
- The error `Cannot set property 'err' of undefined` will no longer incorrectly throw when rerunning tests in the Test Runner. Fixes [#7874](https://github.com/cypress-io/cypress/issues/7874).
- Skipping the last test before a nested suite with a `before` hook will now correctly run the tests in the suite following the skipped test. Fixes [#8086](https://github.com/cypress-io/cypress/issues/8086).
**Dependency Updates:**
- Upgraded `md5` from `2.2.1` to `2.3.0`. Addressed in [#8161](https://github.com/cypress-io/cypress/pull/8161).
- Upgraded `electron-context-menu` from `0.15.1` to `2.2.0`. Addressed in [#8180](https://github.com/cypress-io/cypress/pull/8180).