fix: more precise `validate_dynamic_component`

.changeset/gold-pumpkins-destroy.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: more precise `validate_dynamic_component`

packages/svelte/src/internal/client/validate.js

@@ -1,6 +1,7 @@
 import { untrack } from './runtime.js';
 import { get_descriptor, is_array } from '../shared/utils.js';
 import * as e from './errors.js';
+import { validate_component } from '../shared/validate.js';
 
 /** regex of all html void element names */
 const void_element_names =
@@ -28,7 +29,10 @@ export function validate_dynamic_component(component_fn) {
 	} catch (err) {
 		const { message } = /** @type {Error} */ (err);
 
-		if (typeof message === 'string' && message.indexOf('is not a function') !== -1) {
+		if (
+			typeof message === 'string' &&
+			message.indexOf(`${validate_component.name}(...) is not a function`) !== -1
+		) {
 			e.svelte_component_invalid_this_value();
 		}
 

packages/svelte/tests/runtime-runes/samples/dynamic-component-func-error/A.svelte

@@ -0,0 +1,5 @@
+<script>
+	let { prop } = $props();
+</script>
+
+{prop}

packages/svelte/tests/runtime-runes/samples/dynamic-component-func-error/_config.js

@@ -0,0 +1,9 @@
+import { test } from '../../test';
+
+export default test({
+	expect_unhandled_rejections: true,
+	error: 'is not a function',
+	compileOptions: {
+		dev: true
+	}
+});

packages/svelte/tests/runtime-runes/samples/dynamic-component-func-error/main.svelte

@@ -0,0 +1,9 @@
+<script>
+	import A from "./A.svelte";
+</script>
+
+{#snippet snip(comp, func)}
+	<svelte:component this={comp} prop={func(10)}></svelte:component>
+{/snippet}
+
+{@render snip(A)}