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Source-grounded rewrite of 529 published docs pages with per-unit information-loss verification: 1,713 factual corrections cited to src/**, generated surfaces regenerated, frontmatter titles preserved for i18n, release notes pages untouched. All docs gates green. Closes #100141
87 lines
2.8 KiB
Markdown
87 lines
2.8 KiB
Markdown
---
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summary: Historical Node + tsx "__name is not a function" crash and its cause
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read_when:
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- Investigating a tsx/esbuild loader crash that mentions a missing __name helper
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title: "Node + tsx crash"
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---
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# Node + tsx "\_\_name is not a function" crash
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## Status
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Resolved. This crash does not reproduce on the current `tsx` version pinned in
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`package.json` (`4.22.3`) or on current Node releases. Kept here in case a
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future `tsx`/esbuild upgrade reintroduces it.
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## Original symptom
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Running OpenClaw dev scripts through `tsx` failed at startup with:
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```text
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[openclaw] Failed to start CLI: TypeError: __name is not a function
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at createSubsystemLogger (src/logging/subsystem.ts)
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at <caller> (src/agents/auth-profiles/constants.ts)
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```
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Line numbers are omitted; both files have changed since the original crash
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and the specific lines no longer match.
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This appeared after dev scripts switched from Bun to `tsx` (`2871657e`,
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2026-01-06) to make Bun optional. The equivalent Bun-based path did not crash.
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It was originally observed on Node v25.3.0 on macOS; other platforms that run
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Node 25 were considered likely to be affected too.
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## Cause
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`tsx` transforms TS/ESM through esbuild with `keepNames: true` hardcoded in
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its transform options. That setting makes esbuild wrap named function/class
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declarations in a call to a `__name` helper so `fn.name` survives minification
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and bundling. The crash means the helper was missing or shadowed at the call
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site for that module in the affected `tsx`/Node combination, so `__name(...)`
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threw instead of returning the wrapped value.
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## Current repro check
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```bash
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node --version
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pnpm install
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node --import tsx src/entry.ts status
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```
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Minimal isolated repro (loads only the module from the original stack trace):
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```bash
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node --import tsx scripts/repro/tsx-name-repro.ts
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```
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Both commands currently exit cleanly. If either throws `__name is not a
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function` again, capture the exact Node version, `tsx` version
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(`node_modules/tsx/package.json`), and full stack trace before filing upstream.
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## Workarounds (if the crash returns)
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- Run dev scripts with Bun instead of `node --import tsx`.
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- Run `pnpm tsgo` for type checking, then run the built output instead of the
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source through `tsx`:
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```bash
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pnpm tsgo
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node openclaw.mjs status
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```
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- Try a different `tsx` version (`pnpm add -D tsx@<version>` is a dependency
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change and needs approval per repo policy) to bisect whether the esbuild
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version it bundles reintroduced the bug.
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- Test on a different Node major/minor to see whether the failure is version
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specific.
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## References
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- [https://esbuild.github.io/api/#keep-names](https://esbuild.github.io/api/#keep-names)
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- [https://github.com/evanw/esbuild/issues/1031](https://github.com/evanw/esbuild/issues/1031)
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## Related
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- [Node.js install](/install/node)
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- [Gateway troubleshooting](/gateway/troubleshooting)
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