git merge 报错：error: Your local changes to the following files would be overwritten by m

error log：

error: Your local changes to the following files would be overwritten by merge:
	app/Http/Controllers/User/UserIndexController.php
Please commit your changes or stash them before you merge.
Aborting

　　

You can't merge with local modifications. Git protects you from losing potentially important changes. You have three options.

• One is to commit the change using

git commit -m "My message"

　　

• 2.The second is to stash it. stashing acts as a stack, where you can push changes, and you pop them in reverse order.

To stash type:

git stash

　　

  Do the merge, and than pull the stash:

git stash pop

　　

• The third options is to discard the local changes using 

git reset --hard.