Magento upgrade issue 2.1.7 to 2.1.8

[ranesh26]

Preconditions

1. magento 2.1.7 to 2.1.8 php7.0-fpm,mysql 5.7

Steps to reproduce

1. composer require magento/product-community-edition 2.1.8 --no-update
2. composer update

Expected result

1. composer update is not working

Actual result

1. 

[orlangur]

Try comparing your composer.json to https://github.com/magento/magento2/blob/2.1/composer.json, especially the "minimum-stability": "alpha" part.

[delidiscount]

I upgrade from a clean 2.1.7 with sampledata to 2.1.8 with the system upgrade build in in Magento and now I cannot acces my admin anymore ?

[korostii]

@delidiscount,
Please consider creating a separate issue and providing some more details about your situation.
It's impossible to guess want went wrong based on the little info you've provided in the comment

[IlnitskiyArtem]

Hi @ranesh26.
I observed similar behavior with update from 2.1.7 to 2.1.8, but after dropping my database and installing a clean instance of magento cannot reproduce it anymore. Also tried to reproduce it by filling up my store using performance toolkit, but it doesn't helped. Please, provide more information. Maybe there is some store configurations or additional modules that triggers this issue.