In rare cases SourceErrorFormat is called wihtout position and hides the original error

PanayotCankov · PanayotCankov · commit dfdcc91eea61 · 2016-01-08T16:58:03.000+02:00
diff --git a/ui/builder/builder.ts b/ui/builder/builder.ts
@@ -213,7 +213,7 @@ namespace xml2ui {
 
     export function SourceErrorFormat(uri): ErrorFormatter {
         return (e: Error, p: xml.Position) => {
-            var source = new Source(uri, p.line, p.column);
+            var source = p ? new Source(uri, p.line, p.column) : new Source(uri, -1, -1);
             e = new SourceError(e, source, "Building UI from XML.");
             return e;
         }

Original file line number	Diff line number	Diff line change
`@@ -213,7 +213,7 @@ namespace xml2ui {`
`213`	`213`
`214`	`214`	`export function SourceErrorFormat(uri): ErrorFormatter {`
`215`	`215`	`return (e: Error, p: xml.Position) => {`
`216`		`- var source = new Source(uri, p.line, p.column);`
	`216`	`+ var source = p ? new Source(uri, p.line, p.column) : new Source(uri, -1, -1);`
`217`	`217`	`e = new SourceError(e, source, "Building UI from XML.");`
`218`	`218`	`return e;`
`219`	`219`	`}`