rem: this.messages.push("Failure: " + message); 
add:  var line = ""; try { throw new Error("stack"); } catch(e){ line = (/\.html:(\d+)/.exec(e.stack || '') || ['',''])[1]; }  this.messages.push("Failure: " + message + (line ? " Line #" + line : "")); 
context:   fail: function(message) {    this.failures++;    this.messages.push("Failure: " + message);  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/88fd7d975f0287cb2173246c67ce721ed765630a/unittest.js/buggy/dom/tests/mochitest/ajax/prototype/test/lib/unittest.js