fix: allow get_proxied_value to return original value when error

[crookedneighbor]

closes #15546

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More details in the connected issue, but the TL;DNR version is that when running the dev server, the init_array_prototype_warnings function causes problems with the iframe/JavaScript interactions for 3rd party integrations, such as with Recurly and other payment providers. This is caused because the check for a proxied value involves passing the value to check if it exists within.

By simply wrapping the get_proxied_value function in a try/catch, we avoid the problem of halting the JS run by the 3rd party script on the iframe it controls.

Tests and linting

• Run the tests with pnpm test and lint the project with pnpm lint

I intended to write a test for this function, but it appears that the existing proxy test file only runs tests against the proxy function. I can still do that, but it seemed out of keeping with the patterns I see in the code base already.

[changeset-bot]

🦋 Changeset detected

Latest commit: fcf67ee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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svelte	Patch

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-svelte-15577-svelte.vercel.app/

[Rich-Harris]

seems reasonable — thank you!

[github-actions]

Playground

pnpm add https://pkg.pr.new/svelte@15577

[crookedneighbor]

Thanks for the quick review, merge and release! This helps us a lot.