M2.2.1 Unable to open Address book after account creation

[tig-dennisvanderhammen]

Preconditions

1. Magento version 2.2.1
2. PHP version 7.0.7

Steps to reproduce

1. Set up a Magento v2.2.1 environment.
2. Create an account as a customer.
3. Immediately after creating your customer, try to open your address book.

Expected result

1. Your address book opens up, where you can insert your address details.

Actual result

A 500 error pops up in my screen.
The following logs are generated:
2017/11/10 17:12:21 [error] 2807#2807: *27047 FastCGI sent in stderr: "PHP message: PHP Fatal error: Cannot use Magento\Framework\App\Helper\Context as Context because the name is already in use in /public/vendor/magento/module-customer/Model/AttributeChecker.php on line 11" while reading response header from upstream, client: 81.30.47.209, server: example.com, request: "GET /customer/address/new/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php7-fpm.sock:", host: "example.com"

[mrkhoa99]

@tig-dennisvanderhammen Are you using a fresh Magento install?

[tig-dennisvanderhammen]

Yes, I get this error on a clean Magento installation.

[magento-engcom-team]

@tig-dennisvanderhammen, thank you for your report.
We were not able to reproduce this issue by following the steps you provided. If you'd like to update it, please reopen the issue.
We tested the issue on 2.3.0-dev, 2.1.10, 2.2.1

[chris-pook]

I was able to reproduce this error with the same steps as above in 2.2.1.

Site was running in production mode and I had run composer dump-autoload -o. The issue is related to an unnecessary use operator in a Customer module Model.

PR added here: #12220

[orlangur]

@magento-engcom-team this should be reproduced for sure due to https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Customer/Model/Context.php class existence. Maybe app/code/Magento/Customer/Model/AttributeChecker.php is not involved in some circumstances with the steps provided though.

[okorshenko]

Hi @tig-dennisvanderhammen
The issue has been fixed and delivered in 2.2-develop branch. Will be available with upcoming patch release.

[tig-dennisvanderhammen]

Thank you for your time!