fix unrelated bug that was causing tests to fail

mocha.opts

@@ -1,2 +1 @@
---bail
 test/test.js

src/shared/index.js

@@ -185,7 +185,7 @@ export function _mount(target, anchor) {
 }
 
 export function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 export function isPromise(value) {

test/js/samples/collapses-text-around-comments/expected-bundle.js

@@ -175,7 +175,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/component-static/expected-bundle.js

@@ -151,7 +151,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/computed-collapsed-if/expected-bundle.js

@@ -151,7 +151,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/css-media-query/expected-bundle.js

@@ -171,7 +171,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/css-shadow-dom-keyframes/expected-bundle.js

@@ -163,7 +163,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/do-use-dataset/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/dont-use-dataset-in-legacy/expected-bundle.js

@@ -171,7 +171,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/dont-use-dataset-in-svg/expected-bundle.js

@@ -171,7 +171,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/each-block-changed-check/expected-bundle.js

@@ -183,7 +183,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/event-handlers-custom/expected-bundle.js

@@ -163,7 +163,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/if-block-no-update/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/if-block-simple/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/inline-style-optimized-multiple/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/inline-style-optimized-url/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/inline-style-optimized/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/inline-style-unoptimized/expected-bundle.js

@@ -167,7 +167,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/input-without-blowback-guard/expected-bundle.js

@@ -171,7 +171,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/legacy-input-type/expected-bundle.js

@@ -169,7 +169,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/legacy-quote-class/expected-bundle.js

@@ -186,7 +186,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/media-bindings/expected-bundle.js

@@ -179,7 +179,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/non-imported-component/expected-bundle.js

@@ -165,7 +165,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/onrender-onteardown-rewritten/expected-bundle.js

@@ -151,7 +151,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/setup-method/expected-bundle.js

@@ -151,7 +151,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/use-elements-as-anchors/expected-bundle.js

@@ -175,7 +175,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {

test/js/samples/window-binding-scroll/expected-bundle.js

@@ -171,7 +171,7 @@ function _mount(target, anchor) {
 }
 
 function _unmount() {
-	this._fragment.u();
+	if (this._fragment) this._fragment.u();
 }
 
 var proto = {