rolldowns `build.optimization.inlineConst` inlines null from `export var foo = null` leading to runtime errors

[dominikg]

Describe the bug

building a minimal sveltekit app and opening preview in a browser causes a 500 response with

TypeError: Cannot set properties of null (setting 'c')
    at render (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/chunks/server.js:1538:11)
    at Function._render [as render] (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/chunks/internal.js:13:18)
    at <root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/index.js:1297:28
    at AsyncLocalStorage.run (node:internal/async_local_storage/async_hooks:91:14)
    at with_request_store (<root>/sveltekit-inlineconst-repro/node_modules/.pnpm/@sveltejs+kit@2.36.2_@sveltejs+vite-plugin-svelte@6.1.3_rolldown-vite@7.1.5_esbuild@0.2_4d0a05a9f3e621d0509fc33c52b3772d/node_modules/@sveltejs/kit/src/exports/internal/event.js:65:20)
    at render_response (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/index.js:1294:15)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async respond_with_error (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/index.js:1664:10)
    at async resolve$1 (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/index.js:3013:34)
    at async fn (<root>/sveltekit-inlineconst-repro/.svelte-kit/output/server/index.js:2881:12)

the code error happens at this code

if (options.context) {
    push();
    null.c = options.context;
}

Notice the null.c. Which i believe is inlined from here https://github.com/sveltejs/svelte/blob/61f75651d6a4f1106a55c2cd357751d473729e55/packages/svelte/src/internal/server/context.js#L7

Reproduction

https://github.com/dominikg/sveltekit-inlineconst-repro

Steps to reproduce

pnpm i
pnpm build && pnpm preview

visit preview site

System Info

rolldown-vite: 7.1.5

Used Package Manager

pnpm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs and the Rolldown-related guide.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[dominikg]

filed in rolldown rolldown/rolldown#5902