When compiled by 'client: true' and call template then 'utils is not defined' occurred.

utils.escapeXML => escape ?

function anonymous(locals, escape, include, rethrow
/**/) {
rethrow = rethrow || function rethrow(err, str, flnm, lineno){
  var lines = str.split('\n');
  var start = Math.max(lineno - 3, 0);
  var end = Math.min(lines.length, lineno + 3);
  var filename = utils.escapeXML(flnm);
  // Error context
  var context = lines.slice(start, end).map(function (line, i){
    var curr = i + start + 1;
    return (curr == lineno ? ' >> ' : '    ')
      + curr
      + '| '
      + line;
  }).join('\n');

  // Alter exception message
  err.path = filename;
  err.message = (filename || 'ejs') + ':'
    + lineno + '\n'
    + context + '\n\n'
    + err.message;

  throw err;
};

[mde]

We have a couple of optimizations in the pipe. I’d like to batch stuff, so I figure a release sometime next week.

[mde]

Pushed out in v2.5.6: https://github.com/mde/ejs/releases/tag/v2.5.6