[fix] validate spread element iterator

Siubaak · Feb 2, 2025 · 2f6d094 · 2f6d094
1 parent c4992d0
commit 2f6d094
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/evaluate/expression.ts b/src/evaluate/expression.ts
@@ -554,6 +554,9 @@ export interface SpreadOptions {
 
 export function* SpreadElement(node: acorn.SpreadElement, scope: Scope, options: SpreadOptions = {}) {
   const result = yield* evaluate(node.argument, scope)
+  if (typeof Symbol === 'function' && typeof result[Symbol.iterator] !== 'function') {
+    throw new TypeError('Spread syntax requires ...iterable[Symbol.iterator] to be a function')
+  }
   return options.spreadProps ? result : [...result]
 }