fix: avoid prototype-chain hits when matching error kinds.

tunnckoCore · coderabbitai[bot] · web-flow · commit 2cf614d874e0 · 2026-01-21T14:16:54.000+02:00
Co-authored-by: coderabbitai[bot] &lt;136622811+coderabbitai[bot]@users.noreply.github.com&gt;
diff --git a/src/utils.ts b/src/utils.ts
@@ -44,7 +44,7 @@ export function validateError<TKindNames>(
   }
 
   const kind = error?.kind;
-  if (kind in errorsMap) {
+  if (kind != null && Object.prototype.hasOwnProperty.call(errorsMap, kind)) {
     const kindName = kind as TKindNames;
     const schema = errorsMap[kindName as any] as any;
     const { kind: _, ...cleanedError } = error;

Original file line number	Diff line number	Diff line change
`@@ -44,7 +44,7 @@ export function validateError<TKindNames>(`
`44`	`44`	`}`
`45`	`45`
`46`	`46`	`const kind = error?.kind;`
`47`		`- if (kind in errorsMap) {`
	`47`	`+ if (kind != null && Object.prototype.hasOwnProperty.call(errorsMap, kind)) {`
`48`	`48`	`const kindName = kind as TKindNames;`
`49`	`49`	`const schema = errorsMap[kindName as any] as any;`
`50`	`50`	`const { kind: _, ...cleanedError } = error;`