Dep optimizer (1.0.2 regression): chunk calls cross-chunk init_*() without importing it → ReferenceError

[JoseGoncalves]

Summary

When rolldown powers Vite 8's dependency optimizer, a generated chunk can call a lazily-initialized cross-chunk init_*() function without importing or declaring it, throwing Uncaught ReferenceError: init_runtime_dom_esm_bundler is not defined at runtime. This is a regression between rolldown 1.0.1 (Vite 8.0.13, correct) and 1.0.2 (Vite 8.0.14, broken).

Note: this surfaces via Vite 8.0.14's optimizeDeps (Vite 8 runs rolldown as its dependency pre-bundler), but the faulty code generation — the missing import for an init_* function that is still called — is rolldown's. Filing here for that reason; cross-reference to Vite for context: https://github.com/vitejs/vite (the rolldown bump landed in vite 8.0.14).

Environment

• rolldown 1.0.2, bundled by vite 8.0.14 (via @quasar/app-vite 2.6.0)
• node 22.22.2, npm 11.15.0, Linux x86_64

Details

The app uses Vue 3 + vue-i18n plus several larger deps (echarts, vue-echarts, vue3-google-map, vue-pdf-embed, vue-currency-input). With enough modules in the optimize pass, the optimizer splits Vue's runtime into separate lazily-initialized sub-chunks (reactivity, runtime-core, runtime-dom, shared), each wrapped in an __esmMin init function.

In the generated vue-i18n.js chunk, the module prelude calls all four:

init_runtime_dom_esm_bundler(), init_reactivity_esm_bundler(), init_runtime_core_esm_bundler(), init_shared_esm_bundler();

but the chunk only imports two of them from the runtime-dom chunk:

import { …, Ln as init_reactivity_esm_bundler, …, St as init_runtime_core_esm_bundler, … } from "./runtime-dom.esm-bundler-<hash>.js";

init_runtime_dom_esm_bundler (exported by the runtime-dom chunk as u) and init_shared_esm_bundler are called but never imported → ReferenceError. Every other consumer chunk (vue.js, @vueuse/core, quasar.client.js, vue3-google-map.js) imports it correctly — only the vue-i18n chunk drops the binding. It looks like the import for the init prelude is pruned while the call is kept (perhaps assuming it's already initialized transitively).

Reproduction conditions

• Vite 8 project (optimizeDeps via rolldown)
• vue + vue-i18n, plus enough additional deps in the optimize pass to force Vue's runtime to split into multiple init_* sub-chunks. In a minimal project Vue stays a single chunk and the bug doesn't appear.

Expected

Each chunk imports every init_* function it calls.

Actual

init_runtime_dom_esm_bundler / init_shared_esm_bundler are called without being imported.

Workaround

Pin rolldown to 1.0.1 (npm overrides) while staying on vite 8.0.14 — verified to restore correct imports.

[bretto36]

I'm getting the same issue. Pinning rolldown to 1.0.1 didn't help, i just reverted to 8.0.13 for now. Thank you for your thorough investigation

[websmurf]

Same issue here; I see this issue is closed as duplicate, but not sure that the original bug report is and whether or not it is fixed or not?

Is that #9502 ?

[msonowal]

It is still not fixed