add:  if (lastStatement) frameLineNumberStack.unshift(lastStatement); 
context: function didEnterCallFrame(sourceId, line){    if (steppingOver || steppingOut)        steppingStack++;    willExecuteStatement(sourceId, line);}
meta: 1725	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1725/08e8c5395401171062a904c8ff1fb878d2140cc4/debugger.js/buggy/WebKitTools/Drosera/debugger.js