var url = scriptInfo.tag; 
    findFirstExecutableLine: function(script)    {        var scriptInfo = this.scriptInfoByTag[script.tag];        var url = scriptInfo.tag;        var pcmap = scriptInfo.pcmap;        var line = script.pcToLine(0, pcmap);        return line;    },
2454	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2454/4430f0c18a86cfa77637c382657dd43348a627ce/firebug-service.js/buggy/extension/components/firebug-service.js