Baldr: correctly propagate AbortError from consume stream body operat…

…ion ()

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1505632
gecko-commit: a7812eefff9559ee40e9f0a8e6c812ea9d36f06d
gecko-integration-branch: central
gecko-reviewers: lth, baku, Ms2ger

wasm/webapi/abort.any.js

@@ -21,4 +21,17 @@ for (const method of methods) {
     controller.abort();
     return promise_rejects(t, 'AbortError', promise, `${method} should reject`);
   }, `${method}() synchronously followed by abort should reject with AbortError`);
+
+  promise_test(async t => {
+    const controller = new AbortController();
+    const signal = controller.signal;
+    return fetch('../incrementer.wasm', { signal })
+    .then(response => {
+      Promise.resolve().then(() => controller.abort());
+      return WebAssembly[method](response);
+    })
+    .catch(err => {
+      assert_true(err.name === "AbortError");
+    });
+  }, `${method}() asynchronously racing with abort should succeed or reject with AbortError`);
 }