library builder: entry points a/b and a-b are built into the same bundle

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#34,128 0 comments 0 reactions 1 assignee View on GitHub

@alan-agius4 is already working on this.

Since Sep 19, 2026.

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Description

angular/build:library area: @angular/build gemini-triaged
Command

build

Is this a regression?
  • Yes, this behavior used to work in the previous version
The previous version in which this bug was not present was

No response

Description

Found while testing #34106 cc @alan-agius4

Two entry points whose names differ only by / vs - (like zz/child and zz-child) get the same bundle name. The build passes with exit 0, one entry point's code overwrites the other's, and both exports point at the same file.

Minimal Reproduction
  1. projects/lib/zz/child/public-api.ts: export const NESTED = 'nested';
  2. projects/lib/zz-child/public-api.ts: export const FLAT = 'flat';
  3. entryPoints: "./zz-child": "projects/lib/zz-child/public-api.ts" and "./zz/child": "projects/lib/zz/child/public-api.ts"
  4. ng build mylib exits 0, fesm2022 has a single mylib-zz-child.mjs with only NESTED, and both ./zz-child and ./zz/child in exports point at it
  5. import { FLAT } from 'mylib/zz-child' fails in the consumer
Exception or Error
Your Environment
@angular/build built from #34106 (005e05ee) with the repo's own bazel build
Angular CLI 22.1.8
Angular 22.1.7
Node 24.16.0
pnpm 11
macOS 25.6, 14 cores, 24 GB
Anything else relevant?

No response

Dominant language
TypeScript
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