[navigation] Handle the case where the initial URL contains a non-pat…

…h hash that points to a non-existing page

js/jquery.mobile.init.js

@@ -85,6 +85,11 @@ define( [ "jquery", "./jquery.mobile.core", "./jquery.mobile.support", "./jquery
 				$.mobile.path.isHashValid( location.hash ) &&
 				( $( location.hash + ':jqmData(role="page")' ).length ||
 					$.mobile.path.isPath( location.hash ) ) ) ) {
+
+				// Store the initial destination
+				if ( $.mobile.path.isHashValid( location.hash ) ) {
+					$.mobile.urlHistory.initialDst = $.mobile.path.parseUrl( location.href ).hash.replace( "#", "" );
+				}
 				$.mobile.changePage( $.mobile.firstPage, { transition: "none", reverse: true, changeHash: false, fromHashChange: true } );
 			}
 			// otherwise, trigger a hashchange to load a deeplink

js/jquery.mobile.navigation.js

@@ -1481,6 +1481,14 @@ define( [
 				// since the hashchange could've been the result of a forward/backward navigation
 				// that crosses from an external page/dialog to an internal page/dialog.
 				to = ( typeof to === "string" && !path.isPath( to ) ) ? ( path.makeUrlAbsolute( '#' + to, documentBase ) ) : to;
+
+				// If we're about to go to an initial URL that contains a reference to a non-existent
+				// internal page, go to the first page instead. We know that the initial hash refers to a
+				// non-existent page, because the initial hash did not end up in the initial urlHistory entry
+				if ( to === path.makeUrlAbsolute( '#' + urlHistory.initialDst, documentBase ) &&
+					urlHistory.stack.length && urlHistory.stack[0].url !== urlHistory.initialDst.replace( dialogHashKey, "" ) ) {
+					to = $.mobile.firstPage;
+				}
 				$.mobile.changePage( to, changePageOptions );
 			}	else {
 				//there's no hash, go to the first page in the dom