php - symfony2 demo application error -


i installed new symfony demo application.

when browse app shows me exception !

an exception has been thrown during rendering of template ("notice: undefined offset: 1") in blog/index.html.twig @ line 22. 500 internal server error - twig_error_runtime 1 linked exception: contexterrorexception »

when checked index.html.twig found line of code 

{{ show_source_code(_self) }}

anyone can ?


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