alternative fix for #1575 - return to 2.8 behaviour

src/compile/dom/Block.ts

@@ -169,11 +169,9 @@ export default class Block {
 
 	toString() {
 		const { dev } = this.compiler.options;
-		const properties = new CodeBuilder();
 
 		if (this.hasIntroMethod || this.hasOutroMethod) {
 			this.addVariable('#current');
-			properties.addBlock(`cr(){ return #current; },`);
 
 			if (!this.builders.mount.isEmpty()) {
 				this.builders.mount.addLine(`#current = true;`);
@@ -188,6 +186,8 @@ export default class Block {
 			this.builders.mount.addLine(`${this.autofocus}.focus();`);
 		}
 
+		const properties = new CodeBuilder();
+
 		let localKey;
 		if (this.key) {
 			localKey = this.getUniqueName('key');

src/compile/nodes/IfBlock.ts

@@ -301,7 +301,7 @@ export default class IfBlock extends Node {
 		const updateMountNode = this.getUpdateMountNode(anchor);
 
 		const destroyOldBlock = deindent`
-			if(${name}.cr()) @groupOutros();
+			@groupOutros();
 			${name}.o(function() {
 				${if_blocks}[${previous_block_index}].d(1);
 				${if_blocks}[${previous_block_index}] = null;
@@ -423,7 +423,7 @@ export default class IfBlock extends Node {
 		// as that will typically result in glitching
 		const exit = branch.hasOutroMethod
 			? deindent`
-				if(${name}.cr()) @groupOutros();
+				@groupOutros();
 				${name}.o(function() {
 					${name}.d(1);
 					${name} = null;

src/shared/transitions.js

@@ -72,8 +72,8 @@ export function wrapTransition(component, node, fn, params, intro) {
 			}
 
 			if (!b) {
-				program.group = outros;
-				outros.remaining += 1;
+				program.group = outros.current;
+				outros.current.remaining += 1;
 			}
 
 			if (obj.delay) {
@@ -165,14 +165,13 @@ export function wrapTransition(component, node, fn, params, intro) {
 	};
 }
 
-export let outros = {
-	remaining: 0,
-	callbacks: []
-};
+export let outros = {};
 
 export function groupOutros() {
-	outros.remaining = 0;
-	outros.callbacks = [];
+	outros.current = {
+		remaining: 0,
+		callbacks: []
+	};
 }
 
 export var transitionManager = {