clone before set — fixes #479

src/shared/index.js

@@ -1,5 +1,4 @@
 export * from './dom.js';
-export * from './methods.js';
 
 export function noop () {}
 
@@ -38,3 +37,102 @@ export function dispatchObservers ( component, group, newState, oldState ) {
 		}
 	}
 }
+
+export function get ( key ) {
+	return key ? this._state[ key ] : this._state;
+}
+
+export function fire ( eventName, data ) {
+	var handlers = eventName in this._handlers && this._handlers[ eventName ].slice();
+	if ( !handlers ) return;
+
+	for ( var i = 0; i < handlers.length; i += 1 ) {
+		handlers[i].call( this, data );
+	}
+}
+
+export function observe ( key, callback, options ) {
+	var group = ( options && options.defer ) ? this._observers.post : this._observers.pre;
+
+	( group[ key ] || ( group[ key ] = [] ) ).push( callback );
+
+	if ( !options || options.init !== false ) {
+		callback.__calling = true;
+		callback.call( this, this._state[ key ] );
+		callback.__calling = false;
+	}
+
+	return {
+		cancel: function () {
+			var index = group[ key ].indexOf( callback );
+			if ( ~index ) group[ key ].splice( index, 1 );
+		}
+	};
+}
+
+export function observeDev ( key, callback, options ) {
+	var c = ( key = '' + key ).search( /[^\w]/ );
+	if ( c > -1 ) {
+		var message = "The first argument to component.observe(...) must be the name of a top-level property";
+		if ( c > 0 ) message += ", i.e. '" + key.slice( 0, c ) + "' rather than '" + key + "'";
+
+		throw new Error( message );
+	}
+
+	return observe.call( this, key, callback, options );
+}
+
+export function on ( eventName, handler ) {
+	if ( eventName === 'teardown' ) return this.on( 'destroy', handler );
+
+	var handlers = this._handlers[ eventName ] || ( this._handlers[ eventName ] = [] );
+	handlers.push( handler );
+
+	return {
+		cancel: function () {
+			var index = handlers.indexOf( handler );
+			if ( ~index ) handlers.splice( index, 1 );
+		}
+	};
+}
+
+export function onDev ( eventName, handler ) {
+	if ( eventName === 'teardown' ) {
+		console.warn( "Use component.on('destroy', ...) instead of component.on('teardown', ...) which has been deprecated and will be unsupported in Svelte 2" );
+		return this.on( 'destroy', handler );
+	}
+
+	return on.call( this, eventName, handler );
+}
+
+export function set ( newState ) {
+	this._set( assign( {}, newState ) );
+	( this._root || this )._flush();
+}
+
+export function _flush () {
+	if ( !this._renderHooks ) return;
+
+	while ( this._renderHooks.length ) {
+		var hook = this._renderHooks.pop();
+		hook.fn.call( hook.context );
+	}
+}
+
+export var proto = {
+	get: get,
+	fire: fire,
+	observe: observe,
+	on: on,
+	set: set,
+	_flush: _flush
+};
+
+export var protoDev = {
+	get: get,
+	fire: fire,
+	observe: observeDev,
+	on: onDev,
+	set: set,
+	_flush: _flush
+};

src/shared/methods.js

@@ -1,98 +0,0 @@
-export function get ( key ) {
-	return key ? this._state[ key ] : this._state;
-}
-
-export function fire ( eventName, data ) {
-	var handlers = eventName in this._handlers && this._handlers[ eventName ].slice();
-	if ( !handlers ) return;
-
-	for ( var i = 0; i < handlers.length; i += 1 ) {
-		handlers[i].call( this, data );
-	}
-}
-
-export function observe ( key, callback, options ) {
-	var group = ( options && options.defer ) ? this._observers.post : this._observers.pre;
-
-	( group[ key ] || ( group[ key ] = [] ) ).push( callback );
-
-	if ( !options || options.init !== false ) {
-		callback.__calling = true;
-		callback.call( this, this._state[ key ] );
-		callback.__calling = false;
-	}
-
-	return {
-		cancel: function () {
-			var index = group[ key ].indexOf( callback );
-			if ( ~index ) group[ key ].splice( index, 1 );
-		}
-	};
-}
-
-export function observeDev ( key, callback, options ) {
-	var c = ( key = '' + key ).search( /[^\w]/ );
-	if ( c > -1 ) {
-		var message = "The first argument to component.observe(...) must be the name of a top-level property";
-		if ( c > 0 ) message += ", i.e. '" + key.slice( 0, c ) + "' rather than '" + key + "'";
-
-		throw new Error( message );
-	}
-
-	return observe.call( this, key, callback, options );
-}
-
-export function on ( eventName, handler ) {
-	if ( eventName === 'teardown' ) return this.on( 'destroy', handler );
-
-	var handlers = this._handlers[ eventName ] || ( this._handlers[ eventName ] = [] );
-	handlers.push( handler );
-
-	return {
-		cancel: function () {
-			var index = handlers.indexOf( handler );
-			if ( ~index ) handlers.splice( index, 1 );
-		}
-	};
-}
-
-export function onDev ( eventName, handler ) {
-	if ( eventName === 'teardown' ) {
-		console.warn( "Use component.on('destroy', ...) instead of component.on('teardown', ...) which has been deprecated and will be unsupported in Svelte 2" );
-		return this.on( 'destroy', handler );
-	}
-
-	return on.call( this, eventName, handler );
-}
-
-export function set ( newState ) {
-	this._set( newState );
-	( this._root || this )._flush();
-}
-
-export function _flush () {
-	if ( !this._renderHooks ) return;
-
-	while ( this._renderHooks.length ) {
-		var hook = this._renderHooks.pop();
-		hook.fn.call( hook.context );
-	}
-}
-
-export var proto = {
-	get: get,
-	fire: fire,
-	observe: observe,
-	on: on,
-	set: set,
-	_flush: _flush
-};
-
-export var protoDev = {
-	get: get,
-	fire: fire,
-	observe: observeDev,
-	on: onDev,
-	set: set,
-	_flush: _flush
-};

test/runtime/samples/set-clones-input/_config.js

@@ -0,0 +1,10 @@
+export default {
+	dev: true,
+
+	test ( assert, component ) {
+		const obj = { a: 1 };
+		component.set( obj );
+		component.set( obj ); // will fail if the object is not cloned
+		component.destroy();
+	}
+}

test/runtime/samples/set-clones-input/main.html

@@ -0,0 +1,7 @@
+<script>
+	export default {
+		computed: {
+			b: a => a + 1
+		}
+	};
+</script>