typescript-eslint · JoshuaKGoldberg · Oct 13, 2024 · Oct 6, 2024 · Oct 6, 2024 · Oct 7, 2024
diff --git a/packages/eslint-plugin/src/rules/await-thenable.ts b/packages/eslint-plugin/src/rules/await-thenable.ts
@@ -79,11 +79,16 @@ export default createRule<[], MessageId>({
           return;
         }
 
-        const asyncIteratorSymbol = tsutils.getWellKnownSymbolPropertyOfType(
-          type,
-          'asyncIterator',
-          checker,
-        );
+        const asyncIteratorSymbol = tsutils
+          .unionTypeParts(type)
+          .map(t =>
+            tsutils.getWellKnownSymbolPropertyOfType(
+              t,
+              'asyncIterator',
+              checker,
+            ),
+          )
+          .find(symbol => symbol != null);
 
         if (asyncIteratorSymbol == null) {
           context.report({

diff --git a/packages/eslint-plugin/tests/rules/await-thenable.test.ts b/packages/eslint-plugin/tests/rules/await-thenable.test.ts
@@ -217,6 +217,13 @@ async function forAwait() {
   for await (const value of anee) {
     console.log(value);
   }
+}
+      `,
+    },
+    {
+      code: `
+declare const asyncIter: AsyncIterable<string> | Iterable<string>;
+for await (const s of asyncIter) {
 }
       `,
     },