[Twig_Error_Syntax] The function "debug" does not exist

[onet4]

When I insert {{ dump() }} in the namespace.html.twig file of the clean template, I get

[Twig_Error_Syntax] The function "debug" does not exist in "/namespace.html.twig" at line 4.

Reference: http://twig.sensiolabs.org/doc/functions/dump.html

I'd like to see the contents of all the available variables.

[mvriel]

I have added a template / transformation parameter twig-debug that can be set to the value true in the develop branch. When set to true you can use the dump() command.

Unfortunately there appears to be an upstream bug with deserializing template XML files; I have filed issue schmittjoh/serializer#139 to resolve this. Once this is resolved will the above work

[onet4]

Thanks for the response. I'm looking forward to it being implemented.

[mvriel]

I have fixed this issue on the develop branch of phpDocumentor2; if you add the following section to your template then all twig transformations run in debug mode and is dump available:

  <parameters>
     <parameter key="twig-debug">true</parameter>
  </parameters>

[onet4]

Thanks!