Steps to reproduce

• Go to advance search in JIRA.
• Insert a JQL that looks like:

  labels="somelable" OR key="issue-123"
  

• Ensure that the issue key above doesn't exist, while the lable exists, and you will get the below error:

Expected behavior

A warning that the issue doesn't exist would be sufficient. For example, searching for the following:

 assignee="drumdrum" OR key="TEST-111"

Where the assignee doesn't exist, but the issue key exists, produces a warning like:

A similar warning should be produced for issue keys as well.