fix(test): report a failing test whose stack names a Bun builtin frame (#35384)

config/scripts/vitest-directory-frame-patch.test.mjs

@@ -0,0 +1,17 @@
+import { readdirSync, readFileSync } from 'node:fs'
+import { createRequire } from 'node:module'
+import { dirname, join } from 'node:path'
+import { expect, it } from 'vitest'
+
+// Bun names builtins `native:L:C`; Vitest resolved that against the repo root, read the `native/`
+// directory as a source map and crashed the run (EISDIR), hiding the real failure. The patch
+// reads source maps only from files; an upgrade that drops it fails here.
+it('reads stack-frame source maps only from files', () => {
+  const vitestRoot = dirname(createRequire(import.meta.url).resolve('vitest/package.json'))
+  const chunks = join(vitestRoot, 'dist', 'chunks')
+  const cliApi = readdirSync(chunks).find((name) => /^cli-api\..+\.js$/.test(name))
+  expect(cliApi).toBeDefined()
+  expect(readFileSync(join(chunks, String(cliApi)), 'utf8')).toContain(
+    'existsSync(file) && statSync(file).isFile()'
+  )
+})