If you have invalid xml and run tns run ios or android the app will crash and an error will be shown

[vhristov5555]

1. Create project
2. Change the xml to be invalid (e.g. "")
3. Run "tns run ios" or "tns run android"
   Actual: The app will crash and an error will be shown in console

1   0x109ad6d4b NativeScript::FFICallback<NativeScript::ObjCMethodCallback>::ffiClosureCallback(ffi_cif*, void*, void**, void*)
2   0x10a17a28e ffi_closure_unix64_inner
3   0x10a17abd2 ffi_closure_unix64
4   0x10aea03c3 -[UIViewController __viewWillAppear😏
5   0x10aea1b12 -[UIViewController viewWillMoveToWindow😏
6   0x10ada56d2 -[UIView(Hierarchy) _willMoveToWindow:withAncestorView😏
7   0x10adb6442 -[UIView(Internal) _addSubview:positioned:relativeTo😏
8   0x10ada4cf8 -[UIView(Hierarchy) addSubview😏
9   0x10ad62c6f -[UIWindow addRootViewControllerViewIfPossible]
10  0x10ad63070 -[UIWindow _setHidden:forced😏
11  0x10ad75ebe -[UIWindow makeKeyAndVisible]
12  0x10a17aa2d ffi_call_unix64
13  0x12799e490
file:///app/tns_modules/tns-core-modules/ui/builder/builder.js:196:56: JS ERROR Error: Building UI from XML. @file:///app/home/home-page.xml:13:5"

Expected: App not to crash and the red label on the device to be shown with the proper text

[Plamen5kov]

Hi @vhristov5555,
Change the xml to be invalid (e.g. "")
In the default project templates, there are no XML files only HTML ones. Can you be more specific?

[vhristov5555]

In JS and TS project you have xml files. Every invalid XML is triggering this problem.
Example for invalid xml:
`

<ActionBar title="Home" class="action-bar">
</ActionBar>
<ScrollView>
	<StackLayout class="home-panel">
		<!--Add your page content here-->
		<Label textWrap="true" text="Play with NativeScript!" class="h2 description-label" />

</ScrollView>

`
try on Playground:
https://play.nativescript.org/?template=play-js&id=yxNatI

[Plamen5kov]

@vhristov5555 I managed to reproduce the issue. The expected behavior for Android is to show an error activity with a comprehensive error: Error building XML close tagname: ... filename ....line column. If you expect different behavior please describe it in detail and we'll mark it as a feature.