fix(core): avoid cloning URL objects in ESM resolution

[9aoy]

Summary

This PR fixes a Node 24 native TypeScript loader interaction where reused non-isolated workers could throw DataCloneError: Cannot clone object of unsupported type. during ESM resolution. Rstest now passes string parent URLs to import.meta.resolve instead of URL objects, preserves absolute specifiers as file:// strings, and keeps bare static imports resolving from the original test path while relative linked assets still resolve from the referencing module.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 13 projects in monorepo, 1 project with changes.

📊 Quick Summary

Project	Total Size	Change
adapter-rsbuild	3.7 KB	0
adapter-rslib	24.7 KB	0
adapter-rspack	7.8 KB	0
browser	2.0 MB	0
browser-react	3.7 KB	0
browser-ui	810.0 KB	0
coverage-istanbul	14.5 KB	0
coverage-v8	16.3 KB	0
core/browser	971.9 KB	0
core/loaders	869.0 B	0
core/main	1.7 MB	+615.0 B (0.0%)
vscode/extension	27.0 MB	0
vscode/worker	14.5 KB	0

📋 Detailed Reports (Click to expand)

📁 core/main

Path: packages/core/.rsdoctor/main/rsdoctor-data.json

📌 Baseline Commit: 13ed59c88b | PR: #1340

Metric	Current	Baseline	Change
📊 Total Size	1.7 MB	1.7 MB	+615.0 B (0.0%)
📄 JavaScript	1.6 MB	1.6 MB	+615.0 B (0.0%)
🎨 CSS	0 B	0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	81.6 KB	81.6 KB	0

📦 Download Diff Report: core/main Bundle Diff

Generated by Rsdoctor GitHub Action

[github-actions]

📝 Rstest Ecosystem CI: Open

suite	result
rsbuild	❌ failure
examples	✅ success
rspress	✅ success
rslib	✅ success
rsdoctor	✅ success
modernjs	✅ success

[github-actions]

📝 Rstest Ecosystem CI: Open

suite	result
rspress	✅ success
rsbuild	✅ success
rslib	✅ success
rsdoctor	✅ success
examples	✅ success
modernjs	✅ success

[Copilot]

Pull request overview

This PR addresses a DataCloneError that occurred on Node 24 when reused non-isolated workers ran through Rstest's ESM resolution while Node's native TypeScript loader hook was active. The root cause: passing URL objects across the loader-hook worker boundary triggered structured-clone failures. The fix normalizes the parent argument of import.meta.resolve to a string file:// URL, returns absolute specifiers as href strings, and tightens how the static link callback selects an origin (only relative specifiers use the referencing module; bare specifiers fall back to testPath).

Changes:

• Centralize import.meta.resolve usage behind a resolveModule helper in both loadEsModule.ts and loadModule.ts, always passing a string parent URL; add a createRequire-based fallback in loadEsModule.ts for environments without import.meta.resolve.
• Stop passing URL objects for absolute specifiers — use .href strings consistently.
• In vm.SourceTextModule.link, pass referencingModule.identifier as the origin only for relative specifiers so bare/subpath imports keep resolving from the original test path, and drop the incorrect cast of referencingModule to ImportCallOptions.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/runtime/worker/loadEsModule.ts	Adds resolveModule helper with string parent URL, createRequire fallback; fixes link callback to pass options + origin separately.
packages/core/src/runtime/worker/loadModule.ts	Mirrors the resolveModule helper and .href normalization for the CJS-output loader.
packages/core/tests/runner/loadEsModule.test.ts	Adds regression tests covering ESM resolution after a native TS load and bare static imports resolving from the test path.
packages/core/tests/runner/fixtures/nativeTsLoader.ts	New .ts fixture used to trigger Node's native TypeScript loader before the resolution test.
packages/core/tests/runner/fixtures/bare-parent/package.json	New fixture package declaring a #fixture-pkg subpath import.
packages/core/tests/runner/fixtures/bare-parent/bare-parent-pkg/index.mjs	Target module for the #fixture-pkg subpath import.

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