From a2243888d00a9aad54faaf67308652d58ba4b94b Mon Sep 17 00:00:00 2001
From: Tim van der Lippe <TimvdLippe@users.noreply.github.com>
Date: Sat, 13 Sep 2025 11:27:08 +0200
Subject: [PATCH 1/5] Mark `AbortSignal` as nullable

The getter steps [1] specify to return `this.signal`.
Its signal is nullable [2] and therefore the getter
should also be nullable.

[1]: https://fetch.spec.whatwg.org/#dom-request-signal
[2]: https://fetch.spec.whatwg.org/#request-signal
---
 fetch.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fetch.bs b/fetch.bs
index f00f3c966..d91df3cda 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -8254,7 +8254,7 @@ interface Request {
   readonly attribute boolean keepalive;
   readonly attribute boolean isReloadNavigation;
   readonly attribute boolean isHistoryNavigation;
-  readonly attribute AbortSignal signal;
+  readonly attribute AbortSignal? signal;
   readonly attribute RequestDuplex duplex;
 
   [NewObject] Request clone();

From 1002d6e5ca74e67c475a82c198bea3fdb9d8db2b Mon Sep 17 00:00:00 2001
From: Tim van der Lippe <TimvdLippe@users.noreply.github.com>
Date: Tue, 16 Sep 2025 19:56:31 +0200
Subject: [PATCH 2/5] Update fetch.bs

---
 fetch.bs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fetch.bs b/fetch.bs
index d91df3cda..3d1957a23 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -8254,7 +8254,7 @@ interface Request {
   readonly attribute boolean keepalive;
   readonly attribute boolean isReloadNavigation;
   readonly attribute boolean isHistoryNavigation;
-  readonly attribute AbortSignal? signal;
+  readonly attribute AbortSignal signal;
   readonly attribute RequestDuplex duplex;
 
   [NewObject] Request clone();
@@ -8919,6 +8919,10 @@ set; otherwise false.
 <p>The <dfn attribute for=Request><code>signal</code></dfn> getter steps are to return <a>this</a>'s
 <a for="Request">signal</a>.
 
+<p class="note"><a>this</a>'s <a for="Request">signal</a> is always initialized in the
+<a href="#ref-for-request-signal②">constructor</a> and when
+<a href="#ref-for-request-signal⑤>cloning</a>.
+
 <p>The <dfn attribute for=Request><code>duplex</code></dfn> getter steps are to return
 "<code>half</code>".
 

From 1b2314d79df9c9e813bf26f59f8f9ea545ae1102 Mon Sep 17 00:00:00 2001
From: Tim van der Lippe <TimvdLippe@users.noreply.github.com>
Date: Tue, 16 Sep 2025 19:57:56 +0200
Subject: [PATCH 3/5] Add missing quote

---
 fetch.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fetch.bs b/fetch.bs
index 3d1957a23..1075abf25 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -8921,7 +8921,7 @@ set; otherwise false.
 
 <p class="note"><a>this</a>'s <a for="Request">signal</a> is always initialized in the
 <a href="#ref-for-request-signal②">constructor</a> and when
-<a href="#ref-for-request-signal⑤>cloning</a>.
+<a href="#ref-for-request-signal⑤">cloning</a>.
 
 <p>The <dfn attribute for=Request><code>duplex</code></dfn> getter steps are to return
 "<code>half</code>".

From b2705c6771445ec62c0046715feb8437830334ae Mon Sep 17 00:00:00 2001
From: Tim van der Lippe <TimvdLippe@users.noreply.github.com>
Date: Wed, 17 Sep 2025 17:50:35 +0200
Subject: [PATCH 4/5] Update fetch.bs

---
 fetch.bs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fetch.bs b/fetch.bs
index 1075abf25..70506e3a2 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -8748,7 +8748,7 @@ constructor steps are:
  <li><p>Let <var>signals</var> be « <var>signal</var> » if <var>signal</var> is non-null; otherwise
  « ».
 
- <li><p>Set <a>this</a>'s <a for=Request>signal</a> to the result of
+ <li id="signal-initialized-in-constructor"><p>Set <a>this</a>'s <a for=Request>signal</a> to the result of
  <a>creating a dependent abort signal</a> from <var>signals</var>, using {{AbortSignal}} and
  <a>this</a>'s <a>relevant realm</a>.
 
@@ -8919,9 +8919,9 @@ set; otherwise false.
 <p>The <dfn attribute for=Request><code>signal</code></dfn> getter steps are to return <a>this</a>'s
 <a for="Request">signal</a>.
 
-<p class="note"><a>this</a>'s <a for="Request">signal</a> is always initialized in the
-<a href="#ref-for-request-signal②">constructor</a> and when
-<a href="#ref-for-request-signal⑤">cloning</a>.
+<p class="note"><a>This</a>'s <a for="Request">signal</a> is always initialized in the
+<a href="#signal-initialized-in-constructor">constructor</a> and when
+<a href="#signal-initialized-when-cloning">cloning</a>.
 
 <p>The <dfn attribute for=Request><code>duplex</code></dfn> getter steps are to return
 "<code>half</code>".
@@ -8937,7 +8937,7 @@ set; otherwise false.
  <li><p>Let <var>clonedRequest</var> be the result of <a lt=clone for=request>cloning</a>
  <a>this</a>'s <a for=Request>request</a>.
 
- <li><p><a for=/>Assert</a>: <a>this</a>'s <a for=Request>signal</a> is non-null.
+ <li id="signal-initialized-when-cloning"><p><a for=/>Assert</a>: <a>this</a>'s <a for=Request>signal</a> is non-null.
 
  <li><p>Let <var>clonedSignal</var> be the result of <a>creating a dependent abort signal</a> from
  « <a>this</a>'s <a for=Request>signal</a> », using {{AbortSignal}} and <a>this</a>'s

From f275bd3a5c544ea4cbad0cf934da41ab6416c237 Mon Sep 17 00:00:00 2001
From: Tim van der Lippe <TimvdLippe@users.noreply.github.com>
Date: Thu, 18 Sep 2025 15:53:47 +0200
Subject: [PATCH 5/5] Update fetch.bs

---
 fetch.bs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fetch.bs b/fetch.bs
index 70506e3a2..b0c5b0a3b 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -8937,9 +8937,9 @@ set; otherwise false.
  <li><p>Let <var>clonedRequest</var> be the result of <a lt=clone for=request>cloning</a>
  <a>this</a>'s <a for=Request>request</a>.
 
- <li id="signal-initialized-when-cloning"><p><a for=/>Assert</a>: <a>this</a>'s <a for=Request>signal</a> is non-null.
+ <li><p><a for=/>Assert</a>: <a>this</a>'s <a for=Request>signal</a> is non-null.
 
- <li><p>Let <var>clonedSignal</var> be the result of <a>creating a dependent abort signal</a> from
+ <li id="signal-initialized-when-cloning"><p>Let <var>clonedSignal</var> be the result of <a>creating a dependent abort signal</a> from
  « <a>this</a>'s <a for=Request>signal</a> », using {{AbortSignal}} and <a>this</a>'s
  <a>relevant realm</a>.