handle funky edge case around outroing blocks

src/generators/dom/Block.ts

@@ -195,7 +195,7 @@ export default class Block {
 		let outroing;
 		const hasOutros = !this.builders.outro.isEmpty();
 		if (hasOutros) {
-			outroing = this.getUniqueName('outroing');
+			outroing = this.alias('outroing');
 			this.addVariable(outroing);
 		}
 

src/generators/dom/visitors/MustacheTag.ts

@@ -27,7 +27,10 @@ export default function visitMustacheTag(
 	);
 
 	if (dependencies.length) {
-		const changedCheck = dependencies.map(dependency => `'${dependency}' in changed`).join(' || ');
+		const changedCheck = (
+			( block.hasOutroMethod ? `#outroing || ` : '' ) +
+			dependencies.map(dependency => `'${dependency}' in changed`).join(' || ')
+		);
 
 		block.builders.update.addBlock(deindent`
 			if ( ( ${changedCheck} ) && ${value} !== ( ${value} = ${snippet} ) ) {