rem: var headers, match; 
add: if (!cacheEntryDescriptor) return null; 
context: function getContentTypeFromHeaders(cacheEntryDescriptor){  var headers, match;  if (cacheEntryDescriptor)  {      headers = cacheEntryDescriptor.getMetaDataElement("response-head");    match = /^Content-Type:\s*(.*?)\s*(?:\;|$)/mi.exec(headers);    return match[1];  }  return "";}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/24ffc37d5cdc2a681f49407374cc7674f66a11b0/pageInfo.js/buggy/suite/browser/pageInfo.js