report changes correctly

src/compile/render-dom/wrappers/InlineComponent/index.ts

@@ -492,7 +492,6 @@ export default class InlineComponentWrapper extends Wrapper {
 			`);
 
 			if (updates.length) {
-				console.log({ updates });
 				block.builders.update.addBlock(deindent`
 					${updates}
 					${name}.$set(${name_changes});

src/compile/render-dom/wrappers/Slot.ts

@@ -142,7 +142,7 @@ export default class SlotWrapper extends Wrapper {
 
 		block.builders.update.addBlock(deindent`
 			if (${slot} && ${update_conditions}) {
-				${slot}.p(@assign(@assign({}, ${get_slot_changes}(changed)), ctx.$$scope.changed), @get_slot_context(${slot_definition}, ctx, ${get_slot_context}));
+				${slot}.p(@get_slot_changes(${slot_definition}, ctx, changed, ${get_slot_changes}), @get_slot_context(${slot_definition}, ctx, ${get_slot_context}));
 			}
 		`);
 

src/compile/render-dom/wrappers/shared/get_context_merger.ts

@@ -4,7 +4,15 @@ export function get_context_merger(lets: Let[]) {
 	if (lets.length === 0) return null;
 
 	const input = lets.map(l => l.value ? `${l.name}: ${l.value}` : l.name).join(', ');
-	const output = lets.map(l => l.names.join(', ')).join(', ');
+
+	const names = new Set();
+	lets.forEach(l => {
+		l.names.forEach(name => {
+			names.add(name);
+		});
+	});
+
+	const output = Array.from(names).join(', ');
 
 	return `({ ${input} }) => ({ ${output} })`;
 }

src/internal/utils.js

@@ -64,6 +64,12 @@ export function get_slot_context(definition, ctx, fn) {
 		: ctx.$$scope.ctx;
 }
 
+export function get_slot_changes(definition, ctx, changed, fn) {
+	return definition[1]
+		? assign({}, assign(ctx.$$scope.changed || {}, definition[1](fn ? fn(changed) : {})))
+		: ctx.$$scope.changed || {};
+}
+
 export function exclude_internal_props(props) {
 	const result = {};
 	for (const k in props) if (k[0] !== '$') result[k] = props[k];