diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62306fdbdb..566fde5005 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Svelte changelog
 
+## 3.14.1
+
+* Deconflict block method names with other variables ([#3900](https://github.com/sveltejs/svelte/issues/3900))
+* Fix entity encoding issue in text nodes with constant expressions ([#3911](https://github.com/sveltejs/svelte/issues/3911))
+* Make code for unknown prop warnings compatible with older js engines ([#3914](https://github.com/sveltejs/svelte/issues/3914))
+
+## 3.14.0
+
+* Add `loopGuardTimeout` option that augments `for`/`while` loops to prevent infinite loops, primarily for use in the REPL ([#3887](https://github.com/sveltejs/svelte/pull/3887))
+* Keep component bindings in sync when changed in reactive statements ([#3382](https://github.com/sveltejs/svelte/issues/3382))
+* Update attributes before bindings ([#3857](https://github.com/sveltejs/svelte/issues/3857))
+* Prevent variable naming conflict ([#3899](https://github.com/sveltejs/svelte/issues/3899))
+
+
 ## 3.13.0
 
 * New structured code generation, which eliminates a number of edge cases and obscure bugs ([#3539](https://github.com/sveltejs/svelte/pull/3539))
diff --git a/package-lock.json b/package-lock.json
index b11cf80a83..238b6d04d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "svelte",
-  "version": "3.13.0",
+  "version": "3.14.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -500,26 +500,15 @@
       "dev": true
     },
     "code-red": {
-      "version": "0.0.19",
-      "resolved": "https://registry.npmjs.org/code-red/-/code-red-0.0.19.tgz",
-      "integrity": "sha512-pzkA9ikMLR7KatByUJVz33kQKkrDnsJhyuvxSSUnyJNBggkGNStmDe/ezYvfP4CZ9XM7vYIID+YIaMJnlYGzLg==",
+      "version": "0.0.21",
+      "resolved": "https://registry.npmjs.org/code-red/-/code-red-0.0.21.tgz",
+      "integrity": "sha512-luUVxyGNwTU/lG+lY+pitXHJzgDvFa0WfxA4Nsd7uk/S366mHY8B86pwAcyRcKY9BE/HvryVNXCR691Q5ry+Ww==",
       "dev": true,
       "requires": {
         "acorn": "^7.1.0",
         "is-reference": "^1.1.4",
-        "periscopic": "^1.0.2",
+        "periscopic": "^2.0.1",
         "sourcemap-codec": "^1.4.6"
-      },
-      "dependencies": {
-        "periscopic": {
-          "version": "1.1.0",
-          "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-1.1.0.tgz",
-          "integrity": "sha512-sUdDgd8G35JjpBqHGnuc2MECoyUryHGfjtsKFPS6N8MEGHtxoIML8yEWydL1zf+W8EoChX4L7A9AvVRJuM6Lqg==",
-          "dev": true,
-          "requires": {
-            "is-reference": "^1.1.4"
-          }
-        }
       }
     },
     "codecov": {
@@ -2734,9 +2723,9 @@
       "dev": true
     },
     "periscopic": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-2.0.0.tgz",
-      "integrity": "sha512-2YVtztswd6ud5b0+IDD26UhEm1QvlTsR3s7G59CD0txGyhfvQ39YhNuueSmzT5VzHUxiIH0E8S04JSQpXMJ8/g==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-2.0.1.tgz",
+      "integrity": "sha512-twJ8e4RatllMAcbmBqKj8cvZ94HtqSzbb8hJoGj4iSCcCHXxKb06HRxOq4heyq2x/6mKynJDvTTreHCz+m6lJw==",
       "dev": true,
       "requires": {
         "is-reference": "^1.1.4"
diff --git a/package.json b/package.json
index 771dbc194f..703df57e22 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "svelte",
-  "version": "3.13.0",
+  "version": "3.14.1",
   "description": "Cybernetically enhanced web apps",
   "module": "index.mjs",
   "main": "index",
@@ -64,7 +64,7 @@
     "acorn": "^7.1.0",
     "agadoo": "^1.1.0",
     "c8": "^5.0.1",
-    "code-red": "0.0.19",
+    "code-red": "0.0.21",
     "codecov": "^3.5.0",
     "css-tree": "1.0.0-alpha22",
     "eslint": "^6.3.0",
@@ -77,7 +77,7 @@
     "locate-character": "^2.0.5",
     "magic-string": "^0.25.3",
     "mocha": "^6.2.0",
-    "periscopic": "^2.0.0",
+    "periscopic": "^2.0.1",
     "puppeteer": "^1.19.0",
     "rollup": "^1.21.4",
     "rollup-plugin-commonjs": "^10.1.0",
diff --git a/site/rollup.config.js b/site/rollup.config.js
index c713be33c1..9cb963a87d 100644
--- a/site/rollup.config.js
+++ b/site/rollup.config.js
@@ -13,6 +13,9 @@ const mode = process.env.NODE_ENV;
 const dev = mode === 'development';
 const legacy = !!process.env.SAPPER_LEGACY_BUILD;
 
+const onwarn = (warning, onwarn) => (warning.code === 'CIRCULAR_DEPENDENCY' && /[/\\]@sapper[/\\]/.test(warning.message)) || onwarn(warning);
+const dedupe = importee => importee === 'svelte' || importee.startsWith('svelte/');
+
 export default {
 	client: {
 		input: config.client.input(),
@@ -28,7 +31,10 @@ export default {
 				hydratable: true,
 				emitCss: true
 			}),
-			resolve(),
+			resolve({
+				browser: true,
+				dedupe
+			}),
 			commonjs(),
 			json(),
 
@@ -53,6 +59,7 @@ export default {
 				module: true
 			})
 		],
+		onwarn
 	},
 
 	server: {
@@ -67,7 +74,9 @@ export default {
 				generate: 'ssr',
 				dev
 			}),
-			resolve(),
+			resolve({
+				dedupe
+			}),
 			commonjs(),
 			json()
 		],
@@ -78,6 +87,7 @@ export default {
 				require('module').builtinModules || Object.keys(process.binding('natives'))
 			)
 		],
+		onwarn
 	},
 
 	serviceworker: {
diff --git a/src/compiler/compile/render_dom/Block.ts b/src/compiler/compile/render_dom/Block.ts
index 0b9784a6e8..74822ef9be 100644
--- a/src/compiler/compile/render_dom/Block.ts
+++ b/src/compiler/compile/render_dom/Block.ts
@@ -266,7 +266,7 @@ export default class Block {
 					: this.chunks.hydrate
 			);
 
-			properties.create = x`function create() {
+			properties.create = x`function #create() {
 				${this.chunks.create}
 				${hydrate}
 			}`;
@@ -276,7 +276,7 @@ export default class Block {
 			if (this.chunks.claim.length === 0 && this.chunks.hydrate.length === 0) {
 				properties.claim = noop;
 			} else {
-				properties.claim = x`function claim(#nodes) {
+				properties.claim = x`function #claim(#nodes) {
 					${this.chunks.claim}
 					${this.renderer.options.hydratable && this.chunks.hydrate.length > 0 && b`this.h();`}
 				}`;
@@ -284,7 +284,7 @@ export default class Block {
 		}
 
 		if (this.renderer.options.hydratable && this.chunks.hydrate.length > 0) {
-			properties.hydrate = x`function hydrate() {
+			properties.hydrate = x`function #hydrate() {
 				${this.chunks.hydrate}
 			}`;
 		}
@@ -292,7 +292,7 @@ export default class Block {
 		if (this.chunks.mount.length === 0) {
 			properties.mount = noop;
 		} else {
-			properties.mount = x`function mount(#target, anchor) {
+			properties.mount = x`function #mount(#target, anchor) {
 				${this.chunks.mount}
 			}`;
 		}
@@ -302,7 +302,7 @@ export default class Block {
 				properties.update = noop;
 			} else {
 				const ctx = this.maintain_context ? x`#new_ctx` : x`#ctx`;
-				properties.update = x`function update(#changed, ${ctx}) {
+				properties.update = x`function #update(#changed, ${ctx}) {
 					${this.maintain_context && b`#ctx = ${ctx};`}
 					${this.chunks.update}
 				}`;
@@ -310,15 +310,15 @@ export default class Block {
 		}
 
 		if (this.has_animation) {
-			properties.measure = x`function measure() {
+			properties.measure = x`function #measure() {
 				${this.chunks.measure}
 			}`;
 
-			properties.fix = x`function fix() {
+			properties.fix = x`function #fix() {
 				${this.chunks.fix}
 			}`;
 
-			properties.animate = x`function animate() {
+			properties.animate = x`function #animate() {
 				${this.chunks.animate}
 			}`;
 		}
@@ -327,7 +327,7 @@ export default class Block {
 			if (this.chunks.intro.length === 0) {
 				properties.intro = noop;
 			} else {
-				properties.intro = x`function intro(#local) {
+				properties.intro = x`function #intro(#local) {
 					${this.has_outros && b`if (#current) return;`}
 					${this.chunks.intro}
 				}`;
@@ -336,7 +336,7 @@ export default class Block {
 			if (this.chunks.outro.length === 0) {
 				properties.outro = noop;
 			} else {
-				properties.outro = x`function outro(#local) {
+				properties.outro = x`function #outro(#local) {
 					${this.chunks.outro}
 				}`;
 			}
@@ -345,7 +345,7 @@ export default class Block {
 		if (this.chunks.destroy.length === 0) {
 			properties.destroy = noop;
 		} else {
-			properties.destroy = x`function destroy(detaching) {
+			properties.destroy = x`function #destroy(detaching) {
 				${this.chunks.destroy}
 			}`;
 		}
diff --git a/src/compiler/compile/render_dom/index.ts b/src/compiler/compile/render_dom/index.ts
index 49ce17236a..cc0c7dfe31 100644
--- a/src/compiler/compile/render_dom/index.ts
+++ b/src/compiler/compile/render_dom/index.ts
@@ -247,7 +247,7 @@ export default function dom(
 			function create_fragment(#ctx) {
 				${block.get_contents()}
 			}
-		`);	
+		`);
 	}
 
 	body.push(b`
@@ -369,7 +369,7 @@ export default function dom(
 			unknown_props_check = b`
 				const writable_props = [${writable_props.map(prop => x`'${prop.export_name}'`)}];
 				@_Object.keys($$props).forEach(key => {
-					if (!writable_props.includes(key) && !key.startsWith('$$')) @_console.warn(\`<${component.tag}> was created with unknown prop '\${key}'\`);
+					if (!~writable_props.indexOf(key) && key.slice(0, 2) !== '$$') @_console.warn(\`<${component.tag}> was created with unknown prop '\${key}'\`);
 				});
 			`;
 		}
diff --git a/src/compiler/compile/render_dom/wrappers/Element/index.ts b/src/compiler/compile/render_dom/wrappers/Element/index.ts
index 168d53d997..a34091f5b6 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/index.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/index.ts
@@ -304,7 +304,8 @@ export default class ElementWrapper extends Wrapper {
 		}
 
 		// insert static children with textContent or innerHTML
-		if (!this.node.namespace && (this.can_use_innerhtml || this.can_use_textcontent()) && this.fragment.nodes.length > 0) {
+		const can_use_textcontent = this.can_use_textcontent();
+		if (!this.node.namespace && (this.can_use_innerhtml || can_use_textcontent) && this.fragment.nodes.length > 0) {
 			if (this.fragment.nodes.length === 1 && this.fragment.nodes[0].node.type === 'Text') {
 				block.chunks.create.push(
 					 // @ts-ignore todo: should it be this.fragment.nodes[0].node.data instead?
@@ -324,7 +325,8 @@ export default class ElementWrapper extends Wrapper {
 					quasis: []
 				};
 
-				to_html((this.fragment.nodes as unknown as Array<ElementWrapper | TextWrapper>), block, literal, state);
+				const can_use_raw_text = !this.can_use_innerhtml && can_use_textcontent;
+				to_html((this.fragment.nodes as unknown as Array<ElementWrapper | TextWrapper>), block, literal, state, can_use_raw_text);
 				literal.quasis.push(state.quasi);
 
 				block.chunks.create.push(
@@ -634,10 +636,10 @@ export default class ElementWrapper extends Wrapper {
 			});
 
 		block.chunks.init.push(b`
-			var ${levels} = [${initial_props}];
+			let ${levels} = [${initial_props}];
 
-			var ${data} = {};
-			for (var #i = 0; #i < ${levels}.length; #i += 1) {
+			let ${data} = {};
+			for (let #i = 0; #i < ${levels}.length; #i += 1) {
 				${data} = @assign(${data}, ${levels}[#i]);
 			}
 		`);
@@ -867,7 +869,7 @@ export default class ElementWrapper extends Wrapper {
 	}
 }
 
-function to_html(wrappers: Array<ElementWrapper | TextWrapper | TagWrapper>, block: Block, literal: any, state: any) {
+function to_html(wrappers: Array<ElementWrapper | TextWrapper | TagWrapper>, block: Block, literal: any, state: any, can_use_raw_text?: boolean) {
 	wrappers.forEach(wrapper => {
 		if (wrapper.node.type === 'Text') {
 			if ((wrapper as TextWrapper).use_space()) state.quasi.value.raw += ' ';
@@ -876,7 +878,8 @@ function to_html(wrappers: Array<ElementWrapper | TextWrapper | TagWrapper>, blo
 
 			const raw = parent && (
 				parent.name === 'script' ||
-				parent.name === 'style'
+				parent.name === 'style' ||
+				can_use_raw_text
 			);
 
 			state.quasi.value.raw += (raw ? wrapper.node.data : escape_html(wrapper.node.data))
@@ -931,4 +934,4 @@ function to_html(wrappers: Array<ElementWrapper | TextWrapper | TagWrapper>, blo
 			}
 		}
 	});
-}
\ No newline at end of file
+}
diff --git a/test/js/samples/debug-empty/expected.js b/test/js/samples/debug-empty/expected.js
index 3c65e5a950..b545823c57 100644
--- a/test/js/samples/debug-empty/expected.js
+++ b/test/js/samples/debug-empty/expected.js
@@ -72,7 +72,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = ["name"];
 
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key) && !key.startsWith("$$")) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
diff --git a/test/js/samples/debug-foo-bar-baz-things/expected.js b/test/js/samples/debug-foo-bar-baz-things/expected.js
index 4d6a0f61c6..448fc82176 100644
--- a/test/js/samples/debug-foo-bar-baz-things/expected.js
+++ b/test/js/samples/debug-foo-bar-baz-things/expected.js
@@ -167,7 +167,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = ["things", "foo", "bar", "baz"];
 
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key) && !key.startsWith("$$")) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
diff --git a/test/js/samples/debug-foo/expected.js b/test/js/samples/debug-foo/expected.js
index 3f502bc0ca..8abfd1bae1 100644
--- a/test/js/samples/debug-foo/expected.js
+++ b/test/js/samples/debug-foo/expected.js
@@ -165,7 +165,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = ["things", "foo"];
 
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key) && !key.startsWith("$$")) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
diff --git a/test/js/samples/dev-warning-missing-data-computed/expected.js b/test/js/samples/dev-warning-missing-data-computed/expected.js
index f362a42db6..5da2b4aead 100644
--- a/test/js/samples/dev-warning-missing-data-computed/expected.js
+++ b/test/js/samples/dev-warning-missing-data-computed/expected.js
@@ -69,7 +69,7 @@ function instance($$self, $$props, $$invalidate) {
 	const writable_props = ["foo"];
 
 	Object.keys($$props).forEach(key => {
-		if (!writable_props.includes(key) && !key.startsWith("$$")) console.warn(`<Component> was created with unknown prop '${key}'`);
+		if (!~writable_props.indexOf(key) && key.slice(0, 2) !== "$$") console.warn(`<Component> was created with unknown prop '${key}'`);
 	});
 
 	$$self.$set = $$props => {
diff --git a/test/runtime/samples/deconflict-block-methods/_config.js b/test/runtime/samples/deconflict-block-methods/_config.js
new file mode 100644
index 0000000000..2bb1aa8424
--- /dev/null
+++ b/test/runtime/samples/deconflict-block-methods/_config.js
@@ -0,0 +1,6 @@
+export default {
+	compileOptions: {
+		dev: true
+	},
+	html: `<div>deconflicted</div>`
+};
diff --git a/test/runtime/samples/deconflict-block-methods/main.svelte b/test/runtime/samples/deconflict-block-methods/main.svelte
new file mode 100644
index 0000000000..ad75488873
--- /dev/null
+++ b/test/runtime/samples/deconflict-block-methods/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	const create = 'deconflicted';
+</script>
+
+<div>{create}</div>
diff --git a/test/runtime/samples/deconflict-spread-i/_config.js b/test/runtime/samples/deconflict-spread-i/_config.js
new file mode 100644
index 0000000000..f147a4c1ff
--- /dev/null
+++ b/test/runtime/samples/deconflict-spread-i/_config.js
@@ -0,0 +1,3 @@
+export default {
+	preserveIdentifiers: true
+};
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-spread-i/main.svelte b/test/runtime/samples/deconflict-spread-i/main.svelte
new file mode 100644
index 0000000000..a7b201ac4e
--- /dev/null
+++ b/test/runtime/samples/deconflict-spread-i/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	const attrs = {};
+</script>
+
+<i {...attrs}/>
\ No newline at end of file
diff --git a/test/runtime/samples/unchanged-expression-escape/_config.js b/test/runtime/samples/unchanged-expression-escape/_config.js
new file mode 100644
index 0000000000..11a54c0fe9
--- /dev/null
+++ b/test/runtime/samples/unchanged-expression-escape/_config.js
@@ -0,0 +1,7 @@
+export default {
+	html: `
+		<p>Hello world, what's up? this & that</p>
+		<p>Hello world, what's up? this & that</p>
+		<p>Hello world, what's up?<span></span> this & that</p>
+	`,
+};
diff --git a/test/runtime/samples/unchanged-expression-escape/main.svelte b/test/runtime/samples/unchanged-expression-escape/main.svelte
new file mode 100644
index 0000000000..de61ba5906
--- /dev/null
+++ b/test/runtime/samples/unchanged-expression-escape/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	let name = 'world';
+</script>
+
+<p>Hello {name}, what's up? this & that</p>
+<p>Hello world, what's up? this & that</p>
+<p>Hello {name}, what's up?<span /> this & that</p>
\ No newline at end of file