stream: dont access Object.prototype.type during TransformStream init

Fixes: #46355 PR-URL: #46389 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>

Author: debadree25

lib/internal/webstreams/transformstream.js

@@ -358,6 +358,7 @@ function initializeTransformStream(
 readableSizeAlgorithm){
 
 constwritable=newWritableStream({
+__proto__: null,
 start(){returnstartPromise.promise;},
 write(chunk){
 returntransformStreamDefaultSinkWriteAlgorithm(stream,chunk);
@@ -374,6 +375,7 @@ function initializeTransformStream(
 });
 
 constreadable=newReadableStream({
+__proto__: null,
 start(){returnstartPromise.promise;},
 pull(){
 returntransformStreamDefaultSourcePullAlgorithm(stream);

test/parallel/test-whatwg-transformstream.js

@@ -186,3 +186,22 @@ class Source{
 inspect(controller,{depth: 0}),
 /TransformStreamDefaultController\[/);
 }
+
+{
+Object.defineProperty(Object.prototype,'type',{
+get: common.mustNotCall('get %Object.prototype%.type'),
+set: common.mustNotCall('set %Object.prototype%.type'),
+configurable: true,
+});
+
+newTransformStream({
+transform(chunk,controller){
+controller.enqueue(chunk);
+},
+flush(controller){
+controller.terminate();
+}
+});
+
+deleteObject.prototype.type;
+}