When trying to delete a user, if the username contains special characters like "@","#","%" and others, the JQL generated to locate user's existent issues does not work.

Issue Summary

• When trying to delete a user, if the username contains special characters like "@","#","%" and others, the JQL generated to locate user's existent issues does not work.

Error thread:

The character '@' is a reserved JQL character. You must enclose it in a string or use the escape '\u0040\ instead.

Steps to Reproduce

• Go to JIRA Administration > User management.
• From the right "..." select "Delete User"
  
• JIRA will indicate that the user is included in existent issues, and provide a link to search for them:
  )
• Click on the link

Expected Behavior

• JIRA shows a list of the issues where the selected user is involved

Actual Behavior

• JIRA displays a JQL error:

Cause

• JIRA not considering that special characters break JQL queries when generating the search query.

Workaround

• After the JQL gives the error, encase the username in quote marks ("...") and the search will work:
•