Merge branch 'main' into trojan-source-warnings

Author: Rich-Harris

.changeset/blue-badgers-play.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: treat nullish expression as empty string

.changeset/little-worms-wonder.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: prevent invalid BigInt calls from blowing up at compile time

.changeset/strong-coins-peel.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: emit right error for a shadowed invalid rune

.changeset/tall-cherries-fix.md

@@ -67,23 +67,37 @@ for (let i = 0; i < results[0].length; i += 1) {
 	for (const metric of ['time', 'gc_time']) {
 		const times = results.map((result) => +result[i][metric]);
 		let min = Infinity;
+		let max = -Infinity;
 		let min_index = -1;
 
 		for (let b = 0; b < times.length; b += 1) {
-			if (times[b] < min) {
-				min = times[b];
+			const time = times[b];
+
+			if (time < min) {
+				min = time;
 				min_index = b;
 			}
+
+			if (time > max) {
+				max = time;
+			}
 		}
 
 		if (min !== 0) {
-			console.group(`${metric}: fastest is ${branches[min_index]}`);
+			console.group(`${metric}: fastest is ${char(min_index)} (${branches[min_index]})`);
 			times.forEach((time, b) => {
-				console.log(`${branches[b]}: ${time.toFixed(2)}ms (${((time / min) * 100).toFixed(2)}%)`);
+				const SIZE = 20;
+				const n = Math.round(SIZE * (time / max));
+
+				console.log(`${char(b)}: ${'◼'.repeat(n)}${' '.repeat(SIZE - n)} ${time.toFixed(2)}ms`);
 			});
 			console.groupEnd();
 		}
 	}
 
 	console.groupEnd();
 }
+
+function char(i) {
+	return String.fromCharCode(97 + i);
+}

.changeset/wild-bulldogs-move.md

@@ -1,5 +1,15 @@
 # svelte
 
+## 5.28.3
+
+### Patch Changes
+
+- chore: avoid microtasks when flushing sync ([#15895](https://github.com/sveltejs/svelte/pull/15895))
+
+- fix: improve error message for migration errors when slot would be renamed ([#15841](https://github.com/sveltejs/svelte/pull/15841))
+
+- fix: allow characters in the supplementary special-purpose plane ([#15823](https://github.com/sveltejs/svelte/pull/15823))
+
 ## 5.28.2
 
 ### Patch Changes

benchmarking/compare/index.js

@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.28.2",
+  "version": "5.28.3",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {

packages/svelte/CHANGELOG.md

@@ -39,7 +39,7 @@ export function Identifier(node, context) {
 		if (
 			is_rune(node.name) &&
 			context.state.scope.get(node.name) === null &&
-			context.state.scope.get(node.name.slice(1)) === null
+			context.state.scope.get(node.name.slice(1))?.kind !== 'store_sub'
 		) {
 			/** @type {Expression} */
 			let current = node;

packages/svelte/package.json

@@ -823,18 +823,21 @@ export function flushSync(fn) {
 	if (fn) {
 		is_flushing = true;
 		flush_queued_root_effects();
+
+		is_flushing = true;
 		result = fn();
 	}
 
-	flush_tasks();
+	while (true) {
+		flush_tasks();
+
+		if (queued_root_effects.length === 0) {
+			return /** @type {T} */ (result);
+		}
 
-	while (queued_root_effects.length > 0) {
 		is_flushing = true;
 		flush_queued_root_effects();
-		flush_tasks();
 	}
-
-	return /** @type {T} */ (result);
 }
 
 /**