From dae3d950de7eeb977e4bf8ee3a4cefdc586cf5f8 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 29 Jan 2024 14:24:01 -0500
Subject: [PATCH 1/3] disallow TODO errors

---
 packages/svelte/src/compiler/errors.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index 910f5fd65103..3006dca54e68 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -508,7 +508,7 @@ export class CompileError extends Error {
 }
 
 /**
- * @template {keyof typeof errors} T
+ * @template {Exclude<keyof typeof errors, 'TODO'>} T
  * @param {NodeLike | number | null} node
  * @param {T} code
  * @param  {Parameters<typeof errors[T]>} args

From f2bf89967988cb2c59e7f7d16e84c523174a98f0 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 29 Jan 2024 14:32:42 -0500
Subject: [PATCH 2/3] replace TODO errors

---
 packages/svelte/src/compiler/errors.js                   | 4 +++-
 packages/svelte/src/compiler/phases/1-parse/state/tag.js | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/packages/svelte/src/compiler/errors.js b/packages/svelte/src/compiler/errors.js
index 3006dca54e68..98741e29f40d 100644
--- a/packages/svelte/src/compiler/errors.js
+++ b/packages/svelte/src/compiler/errors.js
@@ -88,7 +88,9 @@ const parse = {
 	'illegal-subscription': () => `Cannot reference store value inside <script context="module">`,
 	'duplicate-style-element': () => `A component can have a single top-level <style> element`,
 	'duplicate-script-element': () =>
-		`A component can have a single top-level <script> element and/or a single top-level <script context="module"> element`
+		`A component can have a single top-level <script> element and/or a single top-level <script context="module"> element`,
+	'invalid-render-expression': () => 'expected an identifier followed by (...)',
+	'invalid-render-arguments': () => 'expected at most one argument'
 };
 
 /** @satisfies {Errors} */
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/tag.js b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
index ebfebb73b187..88a444a1f9d7 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/tag.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
@@ -586,11 +586,11 @@ function special(parser) {
 		const expression = read_expression(parser);
 
 		if (expression.type !== 'CallExpression' || expression.callee.type !== 'Identifier') {
-			error(expression, 'TODO', 'expected an identifier followed by (...)');
+			error(expression, 'invalid-render-expression');
 		}
 
 		if (expression.arguments.length > 1) {
-			error(expression.arguments[1], 'TODO', 'expected at most one argument');
+			error(expression.arguments[1], 'invalid-render-arguments');
 		}
 
 		parser.allow_whitespace();

From eb0085ae3cbcaf979566cd87e469f831238d66fb Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 29 Jan 2024 14:33:17 -0500
Subject: [PATCH 3/3] changeset

---
 .changeset/lemon-geese-call.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/lemon-geese-call.md

diff --git a/.changeset/lemon-geese-call.md b/.changeset/lemon-geese-call.md
new file mode 100644
index 000000000000..8090d4512de9
--- /dev/null
+++ b/.changeset/lemon-geese-call.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: replace TODO errors