From 76d1f34ed9cfe6f3a82117034b6bf9b7c79bf6de Mon Sep 17 00:00:00 2001
From: Dominik Picheta <dominik@cloudflare.com>
Date: Fri, 19 May 2023 14:10:17 +0000
Subject: [PATCH] Fixes assert due to Flush in
 WritableStreamInternalController.

---
 src/workerd/api/streams/internal.c++ | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/workerd/api/streams/internal.c++ b/src/workerd/api/streams/internal.c++
index 1c3bb2e02de..ee0d8e385c9 100644
--- a/src/workerd/api/streams/internal.c++
+++ b/src/workerd/api/streams/internal.c++
@@ -1237,8 +1237,8 @@ jsg::Promise<void> WritableStreamInternalController::writeLoopAfterFrontOutputLo
     using Request = kj::Decay<decltype(request)>;
 
     return [this, &request]() -> decltype(auto) {
-      if constexpr (kj::isSameType<Request, Write>()) {
-        // Write requests can have any number of requests backed up after them.
+      if constexpr (kj::isSameType<Request, Write>() || kj::isSameType<Request, Flush>()) {
+        // Write and flush requests can have any number of requests backed up after them.
         KJ_ASSERT(!queue.empty());
       } else {
         // Pipe and Close requests are always the last one in the queue.