Issue Search broken when using NOT with WAS IN

Summary

JQL searches using NOT and WAS IN causes an Internal Server Error. There are some searches that Jira will not allow you to save as a filter as the search does not execute. But in an edge case, if you have a search calling for another filter, it's possible to save it, but you are not able to load it from Issues > Filter Name.

Steps to Reproduce

Scenario 1

1. Navigate to Issues > Search for issues and try to search for:

   project = TEST AND NOT (status was in (Done)) ORDER BY Rank ASC
   

Scenario 2

1. Create one filter with:

   project in (AWD, AWS) AND issuetype in (bug, task, story) AND status was in ("Status 7", open, "Status 8", resolved)
   

2. Create a second filter:

   status was not Closed AND resolution was in (Duplicate, Done, Fixed) AND NOT filter = first_filter
   

3. Go back to the Dashboard and try to open the second filter by navigating to Issues > Filter Name.

Expected Results

You are able to load the filter without any problems.

Actual Results

For the scenario 1:

You are not able to execute the search and the following error is displayed:

Error occurred communicating with the server. Please reload the page and try again.

For the scenario 2:

You are not able to load the filter and get the following error page:

The below exception is thrown in the atlassian-jira.log file:

2017-10-24 16:08:00,746 http-nio-8080-exec-7 ERROR admin 968x123x1 zfc9db 0:0:0:0:0:0:0:1 /issues/ [o.a.c.c.C.[.[localhost].[/jira728].[action]] Servlet.service() for servlet action threw exception
java.lang.IllegalArgumentException: Unrecognized operator: WAS_IN
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.getNotOperator(DeMorgansVisitor.java:132)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:71)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:28)
	at com.atlassian.query.clause.WasClauseImpl.accept(WasClauseImpl.java:45)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visitChildren(DeMorgansVisitor.java:92)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:40)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:28)
	at com.atlassian.query.clause.AndClause.accept(AndClause.java:28)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:34)
	at com.atlassian.jira.jql.clause.DeMorgansVisitor.visit(DeMorgansVisitor.java:28)
	at com.atlassian.query.clause.NotClause.accept(NotClause.java:29)
	at com.atlassian.jira.jql.context.QueryContextVisitor.createContext(QueryContextVisitor.java:53)

Notes

This bug can lead to broken boards as reported under JRASERVER-65345.

Workaround

It is possible to modify the JQL as the example below:

project = TEST AND status was not Done ORDER BY Rank ASC