Reproduction link or steps

I don't know if this is a helpful way to provide a repro case...

1. This PR breaks pnpm tsdown in Oxc repo by adding an entry point to the build: test(DEMO): break tsdown oxc-project/oxc#14002
2. Rolling back TSDown to v0.15.1 fixes it: test(DEMO): fix tsdown oxc-project/oxc#14003
3. Updating TSDown to v0.15.2 breaks it again: test(DEMO): break tsdown again oxc-project/oxc#14004

Notes:

• The only change between (2) and (3) is changing the version of TSDown. Version of transitive deps e.g. rolldown stays the same.
• The contents of the new entry point file doesn't seem to matter. Even an empty file causes the error.
• The command that's failing is pnpm tsdown run from apps/oxlint directory.
• Note: Reason for pinning version of @rolldown/pluginutils is just because @rolldown/[email protected] is less than 24 hours old, and Oxc's pnpm-workspace.yaml contains minimumReleaseAge: 1440 # 1 day. I don't believe it's related to this issue.

If any further info I can provide, or this is not a helpful way to provide a bug repro, please let me know. Happy to do anything I can to isolate the fault - just tell me what to do!

What is expected?

see above

What is actually happening?

see above

Any additional comments?

No response