fix(eslint-plugin): [prefer-regexp-exec] avoid fixing unknown RegExp flags by teee32 · Pull Request #12161 · typescript-eslint/typescript-eslint

teee32 · 2026-03-24T11:50:29Z

PR Checklist

Addresses an existing open issue: fixes Bug: [prefer-regexp-exec] Auto-fix breaks runtime behavior for dynamic RegExp with global ('g') flag #12085
That issue was marked as accepting prs
Steps in Contributing were taken

Overview

The heuristic in definitelyDoesNotContainGlobalFlag() treated any non-literal second argument to RegExp() as proof that the global flag was absent. For flags: string, that is too aggressive: the rule does not know whether runtime flags include 'g'.

This stops reporting when the flags argument is unknown at lint time.

typescript-eslint · 2026-03-24T11:50:34Z

Thanks for the PR, @teee32!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

🙏 Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently on https://opencollective.com/typescript-eslint.

netlify · 2026-03-24T11:50:36Z

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nx-cloud · 2026-03-24T11:51:32Z

View your CI Pipeline Execution ↗ for commit 009d3cd

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☁️ Nx Cloud last updated this comment at 2026-03-24 12:13:39 UTC

codecov · 2026-03-24T11:57:28Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.52%. Comparing base (e9cc25a) to head (009d3cd).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12161   +/-   ##
=======================================
  Coverage   86.52%   86.52%           
=======================================
  Files         501      501           
  Lines       16274    16277    +3     
  Branches     5068     5069    +1     
=======================================
+ Hits        14081    14084    +3     
  Misses       1506     1506           
  Partials      687      687

Flag	Coverage Δ
unittest	`86.52% <100.00%> (+<0.01%)`	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ages/eslint-plugin/src/rules/prefer-regexp-exec.ts	`100.00% <100.00%> (ø)`

🚀 New features to boost your workflow:

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JoshuaKGoldberg

Looking good, thanks! ✨

JoshuaKGoldberg · 2026-03-30T16:23:57Z

Btw @teee32 please don't send a large AI-generated PR body - especially one that partially clobbers the PR template as this one did. They're unnecessarily verbose. https://typescript-eslint.io/contributing/ai-policy

I went ahead and trimmed the body down so we can merge it today.

teee32 · 2026-03-30T16:27:10Z

Btw @teee32 please don't send a large AI-generated PR body - especially one that partially clobbers the PR template as this one did. They're unnecessarily verbose. https://typescript-eslint.io/contributing/ai-policy

I went ahead and trimmed the body down so we can merge it today.

I'm very sorry for the trouble. I will improve.🙂

@ej-shafran

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.58.0 | | npm | @typescript-eslint/parser | 8.56.0 | 8.58.0 | ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. 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This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [@eslint/compat](https://github.com/eslint/rewrite/tree/main/packages/compat#readme) ([source](https://github.com/eslint/rewrite/tree/HEAD/packages/compat)) | [`2.0.3` → `2.0.4`](https://renovatebot.com/diffs/npm/@eslint%2fcompat/2.0.3/2.0.4) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@eslint%2fcompat/2.0.4?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@eslint%2fcompat/2.0.3/2.0.4?slim=true) | | [@rollup/rollup-linux-x64-gnu](https://rollupjs.org/) ([source](https://github.com/rollup/rollup)) | [`4.60.0` → `4.60.1`](https://renovatebot.com/diffs/npm/@rollup%2frollup-linux-x64-gnu/4.60.0/4.60.1) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@rollup%2frollup-linux-x64-gnu/4.60.1?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@rollup%2frollup-linux-x64-gnu/4.60.0/4.60.1?slim=true) | | [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node) ([source](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node)) | [`24.12.0` → `24.12.2`](https://renovatebot.com/diffs/npm/@types%2fnode/24.12.0/24.12.2) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@types%2fnode/24.12.2?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@types%2fnode/24.12.0/24.12.2?slim=true) | | [@typescript-eslint/eslint-plugin](https://typescript-eslint.io/packages/eslint-plugin) ([source](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin)) | [`8.57.2` → `8.58.0`](https://renovatebot.com/diffs/npm/@typescript-eslint%2feslint-plugin/8.57.2/8.58.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@typescript-eslint%2feslint-plugin/8.58.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@typescript-eslint%2feslint-plugin/8.57.2/8.58.0?slim=true) | | [@typescript-eslint/parser](https://typescript-eslint.io/packages/parser) ([source](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser)) | [`8.57.2` → `8.58.0`](https://renovatebot.com/diffs/npm/@typescript-eslint%2fparser/8.57.2/8.58.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@typescript-eslint%2fparser/8.58.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@typescript-eslint%2fparser/8.57.2/8.58.0?slim=true) | | [eslint](https://eslint.org) ([source](https://github.com/eslint/eslint)) | [`10.1.0` → `10.2.0`](https://renovatebot.com/diffs/npm/eslint/10.1.0/10.2.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/eslint/10.2.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/eslint/10.1.0/10.2.0?slim=true) | | [rollup](https://rollupjs.org/) ([source](https://github.com/rollup/rollup)) | [`4.60.0` → `4.60.1`](https://renovatebot.com/diffs/npm/rollup/4.60.0/4.60.1) | ![age](https://developer.mend.io/api/mc/badges/age/npm/rollup/4.60.1?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/rollup/4.60.0/4.60.1?slim=true) | | [ts-jest](https://kulshekhar.github.io/ts-jest) ([source](https://github.com/kulshekhar/ts-jest)) | [`29.4.6` → `29.4.9`](https://renovatebot.com/diffs/npm/ts-jest/29.4.6/29.4.9) | ![age](https://developer.mend.io/api/mc/badges/age/npm/ts-jest/29.4.9?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/ts-jest/29.4.6/29.4.9?slim=true) | --- ### Release Notes <details> <summary>eslint/rewrite (@eslint/compat)</summary> ### [`v2.0.4`](https://github.com/eslint/rewrite/blob/HEAD/packages/compat/CHANGELOG.md#204-2026-04-03) [Compare Source](eslint/rewrite@41eb19f...fe114ee) ##### Dependencies - The following workspace dependencies were updated - dependencies - [@eslint/core](https://github.com/eslint/core) bumped from ^1.1.1 to ^1.2.0 </details> <details> <summary>rollup/rollup (@rollup/rollup-linux-x64-gnu)</summary> ### [`v4.60.1`](https://github.com/rollup/rollup/blob/HEAD/CHANGELOG.md#4601) [Compare Source](rollup/rollup@v4.60.0...v4.60.1) *2026-03-30* ##### Bug Fixes - Resolve a situation where side effect imports could be dropped due to a caching issue ([#6286](rollup/rollup#6286)) ##### Pull Requests - [#6286](rollup/rollup#6286): fix: skip dropping side-effects on namespaceReexportsByName cache hit ([#6274](rollup/rollup#6274)) ([@littlegrayss](https://github.com/littlegrayss), [@TrickyPi](https://github.com/TrickyPi)) - [#6317](rollup/rollup#6317): chore(deps): pin dependencies ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6318](rollup/rollup#6318): chore(deps): update msys2/setup-msys2 digest to [`cafece8`](rollup/rollup@cafece8) ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6319](rollup/rollup#6319): chore(deps): update minor/patch updates ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6320](rollup/rollup#6320): chore(deps): pin dependency typescript to v5 ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6321](rollup/rollup#6321): chore(deps): update openharmony-rs/setup-ohos-sdk action to v1 ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6322](rollup/rollup#6322): fix(deps): update swc monorepo (major) ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) - [#6323](rollup/rollup#6323): chore(deps): lock file maintenance ([@renovate](https://github.com/renovate)\[bot]) - [#6324](rollup/rollup#6324): chore(deps): lock file maintenance ([@renovate](https://github.com/renovate)\[bot], [@lukastaegert](https://github.com/lukastaegert)) </details> <details> <summary>typescript-eslint/typescript-eslint (@typescript-eslint/eslint-plugin)</summary> ### [`v8.58.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) [Compare Source](typescript-eslint/typescript-eslint@v8.57.2...v8.58.0) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. </details> <details> <summary>typescript-eslint/typescript-eslint (@typescript-eslint/parser)</summary> ### [`v8.58.0`](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/parser/CHANGELOG.md#8580-2026-03-30) [Compare Source](typescript-eslint/typescript-eslint@v8.57.2...v8.58.0) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### ❤️ Thank You - Evyatar Daud [@StyleShit](https://github.com/StyleShit) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. </details> <details> <summary>eslint/eslint (eslint)</summary> ### [`v10.2.0`](https://github.com/eslint/eslint/releases/tag/v10.2.0) [Compare Source](eslint/eslint@v10.1.0...v10.2.0) #### Features - [`586ec2f`](eslint/eslint@586ec2f) feat: Add `meta.languages` support to rules ([#20571](eslint/eslint#20571)) (Copilot) - [`14207de`](eslint/eslint@14207de) feat: add `Temporal` to `no-obj-calls` ([#20675](eslint/eslint#20675)) (Pixel998) - [`bbb2c93`](eslint/eslint@bbb2c93) feat: add Temporal to ES2026 globals ([#20672](eslint/eslint#20672)) (Pixel998) #### Bug Fixes - [`542cb3e`](eslint/eslint@542cb3e) fix: update first-party dependencies ([#20714](eslint/eslint#20714)) (Francesco Trotta) #### Documentation - [`a2af743`](eslint/eslint@a2af743) docs: add `language` to configuration objects ([#20712](eslint/eslint#20712)) (Francesco Trotta) - [`845f23f`](eslint/eslint@845f23f) docs: Update README (GitHub Actions Bot) - [`5fbcf59`](eslint/eslint@5fbcf59) docs: remove `sourceType` from ts playground link ([#20477](eslint/eslint#20477)) (Tanuj Kanti) - [`8702a47`](eslint/eslint@8702a47) docs: Update README (GitHub Actions Bot) - [`ddeaded`](eslint/eslint@ddeaded) docs: Update README (GitHub Actions Bot) - [`2b44966`](eslint/eslint@2b44966) docs: add Major Releases section to Manage Releases ([#20269](eslint/eslint#20269)) (Milos Djermanovic) - [`eab65c7`](eslint/eslint@eab65c7) docs: update `eslint` versions in examples ([#20664](eslint/eslint#20664)) (루밀LuMir) - [`3e4a299`](eslint/eslint@3e4a299) docs: update ESM Dependencies policies with note for own-usage packages ([#20660](eslint/eslint#20660)) (Milos Djermanovic) #### Chores - [`8120e30`](eslint/eslint@8120e30) refactor: extract no unmodified loop condition ([#20679](eslint/eslint#20679)) (kuldeep kumar) - [`46e8469`](eslint/eslint@46e8469) chore: update dependency markdownlint-cli2 to ^0.22.0 ([#20697](eslint/eslint#20697)) (renovate\[bot]) - [`01ed3aa`](eslint/eslint@01ed3aa) test: add unit tests for unicode utilities ([#20622](eslint/eslint#20622)) (Manish chaudhary) - [`811f493`](eslint/eslint@811f493) ci: remove `--legacy-peer-deps` from types integration tests ([#20667](eslint/eslint#20667)) (Milos Djermanovic) - [`6b86fcf`](eslint/eslint@6b86fcf) chore: update dependency npm-run-all2 to v8 ([#20663](eslint/eslint#20663)) (renovate\[bot]) - [`632c4f8`](eslint/eslint@632c4f8) chore: add `prettier` update commit to `.git-blame-ignore-revs` ([#20662](eslint/eslint#20662)) (루밀LuMir) - [`b0b0f21`](eslint/eslint@b0b0f21) chore: update dependency eslint-plugin-regexp to ^3.1.0 ([#20659](eslint/eslint#20659)) (Milos Djermanovic) - [`228a2dd`](eslint/eslint@228a2dd) chore: update dependency eslint-plugin-eslint-plugin to ^7.3.2 ([#20661](eslint/eslint#20661)) (Milos Djermanovic) - [`3ab4d7e`](eslint/eslint@3ab4d7e) test: Add tests for eslintrc-style keys ([#20645](eslint/eslint#20645)) (kuldeep kumar) </details> <details> <summary>kulshekhar/ts-jest (ts-jest)</summary> ### [`v29.4.9`](https://github.com/kulshekhar/ts-jest/releases/tag/v29.4.9) [Compare Source](kulshekhar/ts-jest@v29.4.8...v29.4.9) Please refer to [CHANGELOG.md](https://github.com/kulshekhar/ts-jest/blob/main/CHANGELOG.md) for details. ### [`v29.4.8`](kulshekhar/ts-jest@v29.4.7...v29.4.8) [Compare Source](kulshekhar/ts-jest@v29.4.7...v29.4.8) ### [`v29.4.7`](https://github.com/kulshekhar/ts-jest/blob/HEAD/CHANGELOG.md#2947-2026-04-01) [Compare Source](kulshekhar/ts-jest@v29.4.6...v29.4.7) ##### Features - support TypeScript v6 ([eda517d](kulshekhar/ts-jest@eda517d)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - "before 6am on monday" in timezone Europe/Amsterdam, Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Co-authored-by: Bernd Schorgers <me@bjw-s.dev> Reviewed-on: https://git.bjw-s.dev/bjw-s/action-changed-files/pulls/8 Co-authored-by: renovate[bot] <renovate-bot@noreply.git.bjw-s.dev> Co-committed-by: renovate[bot] <renovate-bot@noreply.git.bjw-s.dev>

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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.58.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.58.2 | ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.58.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.58.2 | ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

fix(eslint-plugin): avoid fixing unknown regexp flags

5c362be

test(eslint-plugin): cover prefer-regexp-exec flag branches

009d3cd

JoshuaKGoldberg approved these changes Mar 30, 2026

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JoshuaKGoldberg changed the title ~~fix(eslint-plugin): avoid fixing unknown RegExp flags~~ fix(eslint-plugin): [prefer-regexp-exec] avoid fixing unknown RegExp flags Mar 30, 2026

JoshuaKGoldberg merged commit 5a9bd36 into typescript-eslint:main Mar 30, 2026
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koizuka mentioned this pull request Apr 11, 2026

chore: update typescript-eslint to 8.58 koizuka/drawing-practice#60

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campaigner-prod Bot mentioned this pull request Apr 23, 2026

fix(deps): vuln minor upgrades — 15 packages (minor: 6 · patch: 9) DataDog/ensure-ci-success#60

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fix(eslint-plugin): [prefer-regexp-exec] avoid fixing unknown RegExp flags#12161

fix(eslint-plugin): [prefer-regexp-exec] avoid fixing unknown RegExp flags#12161
JoshuaKGoldberg merged 2 commits intotypescript-eslint:mainfrom
teee32:fix/prefer-regexp-exec-dynamic-flags

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JoshuaKGoldberg commented Mar 30, 2026

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teee32 commented Mar 30, 2026

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teee32 commented Mar 24, 2026 •

edited by JoshuaKGoldberg

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