Twig after update to v2.6.1 - Undefined index: var

问题:

This question already has an answer here:

• “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP 28 answers

I get an error after updating twig

- Updating twig/twig (v2.6.0 => v2.6.1): 

In composer, I have:

"symfony/twig-bundle": "^4.1",

Error is:

twig/twig "Notice: Undefined index: vars"

In template:

{{ form.vars.id }}

If I put {{ dump(form) }}, I see +vars ...

回答1:

It's a (known) bug in twig v2.6.1 - https://github.com/twigphp/Twig/issues/2810

You can simply not update to that version for now, or explicitly mark it not to install until the next version has been released (it should be in the next day or two at most).

# Adding this line to composer.json will ensure that the version will not be installed.
"conflict": {
    "twig/twig": "2.6.1"
},

twig/twig v2.6.2 was released later the same day correcting the bug.