[TIMOB-2206] setInterval unreliable runs code 0, 1 or repeatadly.

While trying to demonstrate another problem I created a new hello world project and run into this. (Android simulator, APIs 2.1-update1, HVGA. Titanium SDK 1.4.0, Titanium Developer (1.2.1) )

Press the launch-button in Titanium Developer, watch if Alert1 (Hej1), Alert2 (Hej2), Alert3(Hej3) and "Timer" is showing on the display.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.
Re-press the launch-button, watch for the same thing.

Most of the time I get Alert3 and Alert2 to show. Sometimes also Timer (1 time). One out of ten times, the timer is actually working. I might see Alert1 briefly, then covered by the window.

Here is the code (look at bottom lines for changes to the HelloWorld project).
----------- app.js --------------

// this sets the background color of the master UIView (when there are no windows/tab groups on it) Titanium.UI.setBackgroundColor('#000');

// create tab group var tabGroup = Titanium.UI.createTabGroup();

// // create base UI tab and root window // var win1 = Titanium.UI.createWindow({

title:'Tab 1',
backgroundColor:'#fff'

}); var tab1 = Titanium.UI.createTab({

icon:'KS_nav_views.png',
title:'Tab 1',
window:win1

});

var label1 = Titanium.UI.createLabel({

color:'#999',
text:'I am Window 1',
font:{fontSize:20,fontFamily:'Helvetica Neue'},
textAlign:'center',
width:'auto'

});

win1.add(label1);

// // create controls tab and root window // var win2 = Titanium.UI.createWindow({

title:'Tab 2',
backgroundColor:'#fff',

});

var tab2 = Titanium.UI.createTab({

icon:'KS_nav_ui.png',
title:'Tab 2',
window:win2

});

var label2 = Titanium.UI.createLabel({

color:'#999',
text:'I am Window 2',
font:{fontSize:20,fontFamily:'Helvetica Neue'},
textAlign:'center',
width:'auto'

});

win2.add(label2);

// // add tabs // tabGroup.addTab(tab1);
tabGroup.addTab(tab2);

// open tab group tabGroup.open();
alert('Hej1');
alert('Hej2');
var A = setInterval(function(){alert('Timeout');},1000);
alert('Hej3');
---------------------log of when timer showed once! ------------------------- [TRACE] I/Log ( 1385): (main) [1,1] checkpoint, app created. [TRACE] I/Log ( 1385): (main) [0,0] checkpoint, on root activity create. [TRACE] D/TiApplication( 1385): (main) [87,87] Analytics Event: type=ti.start [TRACE] D/TiApplication( 1385): event=ti.start [TRACE] D/TiApplication( 1385): timestamp=2010-10-27T20:19:23.032+0000 [TRACE] D/TiApplication( 1385): mid=b47c75af-f1fe-49c9-989c-49d608652d73 [TRACE] D/TiApplication( 1385): sid=43073f16-c401-4cf5-b844-2d4f13d345cb [TRACE] D/TiApplication( 1385): aguid=b10cb0a2-30ab-4e2c-87da-eadd08ba8f39 [TRACE] D/TiApplication( 1385): isJSON=true [TRACE] D/TiApplication( 1385): payload={os [TRACE] D/dalvikvm( 1385): GC freed 3858 objects / 373664 bytes in 83ms [TRACE] E/ROOT ( 1385): (main) [441,528] Leaving TiRootActivity.onCreate [TRACE] I/Log ( 1385): (main) [0,0] checkpoint, on root activity resume. [TRACE] I/TiRootActivity( 1385): (Thread-9) [18,18] eval app.js [TRACE] D/KrollContext( 1385): (kroll$1) [6,24] eval file: app://app.js [TRACE] W/TiAnalyticsSvc( 1385): (Thread-10) [60,84] Analytics Service Started [TRACE] I/ActivityManager( 53): Displayed activity com.x.testofevetargs/.TestofevetargsActivity: 2243 ms (total 2243 ms) [TRACE] I/TabGroupProxy( 1385): (main) [580,664] handleOpen [TRACE] I/ActivityManager( 53): Starting activity: Intent { cmp=com.x.testofevetargs/ti.modules.titanium.ui.TiTabActivity (has extras) } [TRACE] I/ALERT ( 1385): (kroll$1) [51,715] Hej1 [TRACE] W/TiTabActivity( 1385): (main) [72,787] Notifying TiTabGroup, activity is created [TRACE] I/ALERT ( 1385): (kroll$1) [124,911] Hej2 [TRACE] I/ALERT ( 1385): (kroll$1) [107,1018] Hej3 [TRACE] D/dalvikvm( 1385): GC freed 5138 objects / 305216 bytes in 134ms [TRACE] W/TiActivity( 1385): (main) [528,1546] Notifying TiUIWindow, activity is created [TRACE] D/TitaniumModule( 1385): (Timer-0) [472,2018] calling interval timer 0 @1288210765501 [TRACE] I/ALERT ( 1385): (kroll$1) [7,2025] Timeout [TRACE] I/ActivityManager( 53): Displayed activity com.x.testofevetargs/ti.modules.titanium.ui.TiTabActivity: 1415 ms (total 1415 ms) [TRACE] I/TiAnalyticsSvc( 1385): (Thread-10) [1000,3025] Sending 1 analytics events. [TRACE] D/dalvikvm( 1385): GC freed 5580 objects / 378480 bytes in 91ms [TRACE] D/dalvikvm( 1385): GC freed 3589 objects / 190760 bytes in 86ms [TRACE] W/TiAnalyticsSvc( 1385): (Thread-10) [3268,6293] Stopping Analytics Service