Debug toolbar is not shown on PHP errors

[cebe]

The problem is that ErrorHandler does not use application view in this case:
https://github.com/yiisoft/yii2/blob/master/framework/web/ErrorHandler.php#L220

But toolbar is only rendered on view end body event:
https://github.com/yiisoft/yii2/blob/master/extensions/debug/Module.php#L122

@samdark do you remember why app view is not used on PHP error?

We might fix this by adding a similar event to the errorhandler.

[samdark]

I think it's a safeguard for the case when there's an error somewhere in View layer. Adding event seems like a good solution for it.

[yii-bot]

Issue moved to yiisoft/yii2-debug#80

[cebe]

reopening as the fix needs a framework change.