stream: reject primitive values in ReadableStream.from

Reject non-object inputs before looking up iterator methods in
ReadableStream.from(). This matches the Web IDL async sequence
conversion and prevents primitive strings from being accepted through
property-access boxing.

This fixes the WPT test:
"ReadableStream.from throws on invalid iterables; specifically a string".

Refs: https://webidl.spec.whatwg.org/#es-sequence

Signed-off-by: Jeong SeokChan <starp321@naver.com>

Author: standard-Chan

lib/internal/webstreams/readablestream.js

@@ -1438,6 +1438,11 @@ function createReadableStreamState() {
 }
 
 function readableStreamFromIterable(iterable) {
+  if (iterable === null ||
+      (typeof iterable !== 'object' && typeof iterable !== 'function')) {
+    throw new ERR_ARG_NOT_ITERABLE(iterable);
+  }
+
   let stream;
   const iteratorGetter = iterable[SymbolAsyncIterator] ?? iterable[SymbolIterator];
   if (iteratorGetter == null || typeof iteratorGetter !== 'function') {

test/wpt/status/streams.json

@@ -8,13 +8,6 @@
   "readable-streams/cross-realm-crash.window.js": {
     "skip": "Browser-specific test"
   },
-  "readable-streams/from.any.js": {
-    "fail": {
-      "expected": [
-        "ReadableStream.from throws on invalid iterables; specifically a string"
-      ]
-    }
-  },
   "readable-streams/owning-type-message-port.tentative.any.js": {
     "fail": {
       "note": "Readable streams with type owning are not yet supported",