Issue Summary

If you have a custom field with custom value options that contain Turkish character İ, JQL parser won't allow you to search for it:

This used to work fine in 7.0, but not in 7.13 or 8.x.

Steps to Reproduce

1. Create a custom field with options containing İ
2. Try picking it up for JQL search

Expected Results

Able to search.

Actual Results

Unable to search - JQL parser invalidates the query because it things this option does not exist.

Workaround

Currently the only workaround is to avoid using Turkish characters in Jira.