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Title: fix(@angular/build): prevent concurrent stylesheet bundling esbuild context leaks by clydin · Pull Request #33318 · angular/angular-cli · GitHub

Open Graph Title: fix(@angular/build): prevent concurrent stylesheet bundling esbuild context leaks by clydin · Pull Request #33318 · angular/angular-cli

X Title: fix(@angular/build): prevent concurrent stylesheet bundling esbuild context leaks by clydin · Pull Request #33318 · angular/angular-cli

Description: When multiple components in the same file define identical inline styles, concurrent calls to the stylesheet bundler invoke Cache.getOrCreate concurrently with the same key. Because getOrCreate is not concurrency-safe, multiple BundlerContext instances are created. Additionally, if multiple bundle() requests occur concurrently on a BundlerContext when the esbuild context is not yet initialized, they both invoke context(), causing one to overwrite and leak the other. Leaked esbuild contexts keep the Node event loop active forever, hanging the test runner. Resolve the Cache race by using an internal Map of in-flight promises to share the same active request, along with a version counter to detect mid-flight writes and safely retry. Resolve the BundlerContext race by memoizing and sharing the active performBundle promise. Fixes #33317

Open Graph Description: When multiple components in the same file define identical inline styles, concurrent calls to the stylesheet bundler invoke Cache.getOrCreate concurrently with the same key. Because getOrCreate is ...

X Description: When multiple components in the same file define identical inline styles, concurrent calls to the stylesheet bundler invoke Cache.getOrCreate concurrently with the same key. Because getOrCreate is ...

Opengraph URL: https://github.com/angular/angular-cli/pull/33318

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0c80537 fix(@angular/build): prevent concurrent stylesheet bundling esbuild c… clydin Jun 5, 2026 https://github.com/angular/angular-cli/pull/33318/commits/0c80537d835ab07a1800afd630227ef5a221ce52
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