svelte 5 accessors broken after svelte@5.0.0-next.96

[yanick]

Describe the bug

It's probably already known and/or in flux, but just in case it can be of help: changing parameters via accessors was working fine up to svelte@5.0.0-next.96 (using https://github.com/testing-library/svelte-testing-library/blob/main/src/__tests__/rerender.test.js), when at version100 began to die hard with

 FAIL  src/__tests__/rerender.test.js [ src/__tests__/rerender.test.js ]
TypeError: Cannot read properties of undefined (reading 'source')
 ❯ Module.hmr node_modules/.pnpm/svelte@5.0.0-next.97/node_modules/svelte/src/internal/client/dev/hmr.js:16:11
     16|  }
     17| 
     18|  return (data.wrapper ??= /** @type {Component} */ (
       |       ^
     19|   (anchor, props) => {
     20|    let instance = {};

then at version 101 and up stop dying (yay!), but doesn't change the params anymore (sad panda).

Reproduction

git clone https://github.com/testing-library/svelte-testing-library
cd svelte-testing-library
pnpm install
pnpm add svelte@next
vitest src/__tests__/rerender.test.js

Logs

No response

System Info

See, e.g., https://github.com/testing-library/svelte-testing-library/actions/runs/8741149959/job/23986502306

Severity

annoyance