feat(eslint-plugin): [only-throw-error] support yield/await expressions #11417

43081j · 2025-07-21T09:14:49Z

It seems we can actually support yield and await as the type checker will already resolve the yielded/awaited type.

When yielding, it is possible a generator can be typed such that the yield resolves to an Error.

PR Checklist

Addresses an existing open issue: fixes Enhancement: [only-throw-error] support yielded and awaited errors #11418
That issue was marked as accepting prs
Steps in Contributing were taken

typescript-eslint · 2025-07-21T09:14:52Z

Thanks for the PR, @43081j!

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nx-cloud · 2025-07-21T09:16:07Z

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☁️ Nx Cloud last updated this comment at 2025-08-02 00:17:42 UTC

It seems we can actually support yield and await as the type checker will already resolve the yielded/awaited type. When yielding, it is possible a generator can be typed such that the `yield` resolves to an `Error`.

codecov · 2025-07-21T14:20:08Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.86%. Comparing base (b872e2b) to head (402a747).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11417      +/-   ##
==========================================
- Coverage   90.86%   90.86%   -0.01%     
==========================================
  Files         503      503              
  Lines       51052    51046       -6     
  Branches     8416     8413       -3     
==========================================
- Hits        46390    46384       -6     
  Misses       4648     4648              
  Partials       14       14

Flag	Coverage Δ
unittest	`90.86% <ø> (-0.01%)`	⬇️

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

Files with missing lines	Coverage Δ
...ckages/eslint-plugin/src/rules/only-throw-error.ts	`100.00% <ø> (ø)`

🚀 New features to boost your workflow:

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kirkwaiblinger

ezpz! ❤️

JoshuaKGoldberg

Love to see a code removal 🔪 thanks!

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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.32.1 | 8.39.0 | | npm | @typescript-eslint/parser | 8.32.1 | 8.39.0 | ## [v8.39.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8390-2025-08-04) ##### 🚀 Features - **eslint-plugin:** \[only-throw-error] support yield/await expressions ([#11417](typescript-eslint/typescript-eslint#11417)) - **eslint-plugin:** add no-unnecessary-type-conversion to strict-type-checked ruleset ([#11427](typescript-eslint/typescript-eslint#11427)) - update to TypeScript 5.9.2 ([#11445](typescript-eslint/typescript-eslint#11445)) - **eslint-plugin:** \[naming-convention] add enumMember PascalCase default option ([#11127](typescript-eslint/typescript-eslint#11127)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unsafe-assignment] add an `unsafeObjectPattern` message ([#11403](typescript-eslint/typescript-eslint#11403)) - **eslint-plugin:** \[prefer-optional-chain] ignore `check` option for most RHS of a chain ([#11272](typescript-eslint/typescript-eslint#11272)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - James Garbutt [@43081j](https://github.com/43081j) - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) - Sasha Kondrashov - tao - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.38.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8380-2025-07-21) ##### 🩹 Fixes - disallow extra properties in rule options ([#11397](typescript-eslint/typescript-eslint#11397)) - **eslint-plugin:** \[consistent-generic-constructors] resolve conflict with `isolatedDeclarations` if enabled in `constructor` option ([#11351](typescript-eslint/typescript-eslint#11351)) ##### ❤️ Thank You - Andrew Kazakov [@andreww2012](https://github.com/andreww2012) - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.37.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8370-2025-07-14) ##### 🩹 Fixes - **eslint-plugin:** \[unified-signatures] fix false positives for ignoreOverloadsWithDifferentJSDoc option ([#11381](typescript-eslint/typescript-eslint#11381)) ##### ❤️ Thank You - Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.36.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8360-2025-07-07) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. 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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.32.1 | 8.39.0 | | npm | @typescript-eslint/parser | 8.32.1 | 8.39.0 | ## [v8.39.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8390-2025-08-04) ##### 🚀 Features - **eslint-plugin:** \[only-throw-error] support yield/await expressions ([#11417](typescript-eslint/typescript-eslint#11417)) - **eslint-plugin:** add no-unnecessary-type-conversion to strict-type-checked ruleset ([#11427](typescript-eslint/typescript-eslint#11427)) - update to TypeScript 5.9.2 ([#11445](typescript-eslint/typescript-eslint#11445)) - **eslint-plugin:** \[naming-convention] add enumMember PascalCase default option ([#11127](typescript-eslint/typescript-eslint#11127)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unsafe-assignment] add an `unsafeObjectPattern` message ([#11403](typescript-eslint/typescript-eslint#11403)) - **eslint-plugin:** \[prefer-optional-chain] ignore `check` option for most RHS of a chain ([#11272](typescript-eslint/typescript-eslint#11272)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - James Garbutt [@43081j](https://github.com/43081j) - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) - Sasha Kondrashov - tao - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.38.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8380-2025-07-21) ##### 🩹 Fixes - disallow extra properties in rule options ([#11397](typescript-eslint/typescript-eslint#11397)) - **eslint-plugin:** \[consistent-generic-constructors] resolve conflict with `isolatedDeclarations` if enabled in `constructor` option ([#11351](typescript-eslint/typescript-eslint#11351)) ##### ❤️ Thank You - Andrew Kazakov [@andreww2012](https://github.com/andreww2012) - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.37.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8370-2025-07-14) ##### 🩹 Fixes - **eslint-plugin:** \[unified-signatures] fix false positives for ignoreOverloadsWithDifferentJSDoc option ([#11381](typescript-eslint/typescript-eslint#11381)) ##### ❤️ Thank You - Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.36.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8360-2025-07-07) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8351-2025-06-30) ##### 🩹 Fixes - remove prettier from eslint-plugin ([#11339](typescript-eslint/typescript-eslint#11339)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8350-2025-06-23) ##### 🚀 Features - **eslint-plugin:** \[no-base-to-string] add checkUnknown Option ([#11128](typescript-eslint/typescript-eslint#11128)) ##### ❤️ Thank You - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8341-2025-06-16) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8340-2025-06-09) ##### 🩹 Fixes - **typescript-estree:** add validation to interface extends ([#11271](typescript-eslint/typescript-eslint#11271)) ##### ❤️ Thank You - Tao You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8331-2025-06-02) ##### 🩹 Fixes - exclude docs/ directory from eslint-plugin package ([#11251](typescript-eslint/typescript-eslint#11251)) ##### ❤️ Thank You - roottool You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8330-2025-05-26) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. 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43081j mentioned this pull request Jul 21, 2025

Enhancement: [only-throw-error] support yielded and awaited errors #11418

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43081j marked this pull request as ready for review July 21, 2025 14:19

feat(eslint-plugin): support yield/await expressions

6400c3b

It seems we can actually support yield and await as the type checker will already resolve the yielded/awaited type. When yielding, it is possible a generator can be typed such that the `yield` resolves to an `Error`.

43081j force-pushed the yielded-awaitlings branch from 64fa81c to 6400c3b Compare July 21, 2025 14:19

Merge branch 'main' into yielded-awaitlings

7b292b3

kirkwaiblinger previously approved these changes Aug 1, 2025

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kirkwaiblinger added the 1 approval >=1 team member has approved this PR; we're now leaving it open for more reviews before we merge label Aug 1, 2025

lintfix

4e3806c

kirkwaiblinger dismissed their stale review via 4e3806c August 1, 2025 22:51

kirkwaiblinger added 2 commits August 1, 2025 17:09

Merge branch 'main' into yielded-awaitlings

afcd7e4

Merge branch 'main' into yielded-awaitlings

402a747

kirkwaiblinger approved these changes Aug 2, 2025

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JoshuaKGoldberg changed the title ~~feat(eslint-plugin): support yield/await expressions~~ feat(eslint-plugin): [only-throw-error] support yield/await expressions Aug 4, 2025

JoshuaKGoldberg approved these changes Aug 4, 2025

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JoshuaKGoldberg merged commit 422e3e2 into typescript-eslint:main Aug 4, 2025
66 checks passed

43081j deleted the yielded-awaitlings branch August 4, 2025 16:06

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feat(eslint-plugin): [only-throw-error] support yield/await expressions #11417

feat(eslint-plugin): [only-throw-error] support yield/await expressions #11417

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feat(eslint-plugin): [only-throw-error] support yield/await expressions #11417

feat(eslint-plugin): [only-throw-error] support yield/await expressions #11417

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