Issue Summary

The commits signed by the user with an ID containing a special symbol like @ cause an error while clicking on a check to verify the signature.

Steps to Reproduce

1. Create a user with email as username: user@domain.com
2. Add an SSH key to the user profile
3. Make a new commit locally and sign it with the SSH key
4. Push the commit upstream
5. Go to Repository => Open Commits
6. Click on the check mark next to the commit

Expected Results

The pop-up appears without any error showing signature details

Actual Results

The pop-up appears showing signature details but it is covered by the error Page not found - User user@domain.com does not exist

In the HAR file the request to REST API is done to the following endpoint:

/rest/api/latest/users/user%40domain.com?avatarSize=32

And the endpoint returns com.atlassian.bitbucket.user.NoSuchUserException

While the endpoint

rest/api/latest/users/user_domain.com?avatarSize=32

returns expected details

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available