nestjs / nest / 5b453f7a-8504-40fb-838b-26f8af740f6c

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master: 90%

Pull #16683

circleci

fix(core): prevent injector hang when design:paramtypes is missing

When `emitDecoratorMetadata` is unavailable (e.g. esbuild), `@Inject()`
decorators create a sparse array via `SELF_DECLARED_DEPS_METADATA`.
`Array.prototype.map` skips sparse holes, so the `Barrier` in
`resolveConstructorParams` never receives enough signals and hangs
indefinitely.

Use `Array.from()` in `reflectConstructorParams` to convert sparse
arrays into dense arrays with explicit `undefined` values, ensuring
`map` iterates every index and the Barrier resolves correctly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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