Magento product attribute repository save bug

Magento version 2.1.7 CE and EE

Demonstrating that source model is reset in save method of repository for new attribute.

Link to buggy code

How to replicate

• Copy Example/Catalog module into app/code directory.

• Install module

  ./bin/magento module:enable "Example_Catalog"
  ./bin/magento setup:upgrade
  ./bin/magento setup:di:compile
  

• Run command to create an example product attribute

  ./bin/magento example:catalog:create_attribute
  

• In magento admin panel you should see attribute example_attribute_code of input type select having just an empty option.

• Run the command again and you should see the attribute has options from source model.