function stringifyLastBlockHelperMissingInvocation(source) {
  var helperInvocation = source[source.length - 1],
      helperName = (/helpers\.(.*)\)/.exec(helperInvocation) || /helpers\['(.*)'/.exec(helperInvocation))[1],
      matches = /(.*blockHelperMissing\.call\(.*)(stack[0-9]+)(,.*)/.exec(helperInvocation);

  source[source.length - 1] = matches[1] + "'" + helperName + "'" + matches[3];
}

var originalBlockValue = Ember.Handlebars.JavaScriptCompiler.prototype.blockValue;
Ember.Handlebars.JavaScriptCompiler.prototype.blockValue = function() {
  originalBlockValue.apply(this, arguments);
  stringifyLastBlockHelperMissingInvocation(this.source);
};

var originalAmbiguousBlockValue = Ember.Handlebars.JavaScriptCompiler.prototype.ambiguousBlockValue;
Ember.Handlebars.JavaScriptCompiler.prototype.ambiguousBlockValue = function() {
  originalAmbiguousBlockValue.apply(this, arguments);
  stringifyLastBlockHelperMissingInvocation(this.source);
};