fix: don't treat callable standard schemas as function param matchers#16403
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Rich-Harris merged 1 commit intoJul 18, 2026
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This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to version-3, this PR will be updated.⚠️ ⚠️ ⚠️ ⚠️ ⚠️ ⚠️ `version-3` is currently in **pre mode** so this branch has prereleases rather than normal releases. If you want to exit prereleases, run `changeset pre exit` on `version-3`.⚠️ ⚠️ ⚠️ ⚠️ ⚠️ ⚠️ # Releases ## @sveltejs/[email protected] ### Major Changes - breaking: `config` exported from a universal route file takes precedence over a server one ([#16400](#16400)) - breaking: consistent special filename patterns ([#16382](#16382)) ### Minor Changes - feat: support sourcemaps in production ([#16412](#16412)) - feat: support function validators for environment variables ([#16402](#16402)) - feat: better error logging ([#16374](#16374)) ### Patch Changes - fix: don't treat callable standard schemas as function param matchers ([#16403](#16403)) - fix: reject malformed streamed data encoding ([#16423](#16423)) - fix: hide stack traces for internal errors like 404s ([#16411](#16411)) - perf: match only unpaired surrogates when escaping HTML ([#16407](#16407)) - fix: don't report empty environment variables as missing ([#16401](#16401)) - chore: clarify which hooks run during server route resolution ([#16397](#16397)) ## @sveltejs/[email protected] ### Minor Changes - feat: better error logging ([#16374](#16374)) ### Patch Changes - Updated dependencies [[`5220191`](5220191), [`8cb2f7d`](8cb2f7d), [`b88c7a7`](b88c7a7), [`a6ea113`](a6ea113), [`6446f64`](6446f64), [`58f1789`](58f1789), [`09774a2`](09774a2), [`c542fdd`](c542fdd), [`aedaa27`](aedaa27), [`428ee1a`](428ee1a), [`fefb3ae`](fefb3ae)]: - @sveltejs/[email protected] Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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normalize_param_definitionchecks for a function before checking for~standard, but standard schemas can themselves be callable. ArkType'stype()returns one, so it gets wrapped as a plain function matcher and its own validation never runs. The wrapper then treats whatever the call returns as the parsed value, and ArkType returns anArkErrorsinstance rather than throwing:Checking
~standardfirst fixes this, verified against arktype 2.x (invalid values now produceissues, so the route no longer matches). It also matchesParamEntryinpublic.d.ts, which has resolved callable schemas to the schema branch since #16189. Same discriminator fix as #16402.The new test fails on
version-3.Please don't delete this checklist! Before submitting the PR, please make sure you do the following:
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pnpm changesetand following the prompts. Changesets that add features should beminorand those that fix bugs should bepatch. Please prefix changeset messages withfeat:,fix:, orchore:.Edits