Content by Label broken when adding filter 'With parent = Current page()' and the current page doesn't have child pages

Issue Summary

Content by Label will return an error message when the filter 'With parent = Current page()' is added but that current page doesn't have a child page.

Environment

Replicated with Confluence 7.0.2

Steps to Reproduce

1. Create page 1 with no child page
2. Add label, 'test' to page 1
3. Create page 2 and add "Content by Label" macro to it
4. Insert 'test' for label
5. Select "Add a Filter" and pick "With Parent"
6. Pick "Current Page"
7. Click on "Preview"

Expected Results

The macro will return a message such as "There is no content with the specified conditions"

Actual Results

The macro error message:

Error rendering macro 'contentbylabel' : At least one must or should or not query parameter needs to be supplied.

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

java.lang.IllegalArgumentException: At least one must or should or not query parameter needs to be supplied.
	at com.atlassian.confluence.search.v2.BooleanQueryBuilder.build(BooleanQueryBuilder.java:74)
	at com.atlassian.confluence.plugins.cql.v2search.query.ContentIdQuery.expand(ContentIdQuery.java:74)
	at com.atlassian.confluence.plugins.cql.v2search.query.ContentIdQuery.expand(ContentIdQuery.java:19)
	at com.atlassian.confluence.search.v2.SearchExpander.expandAll(SearchExpander.java:19)

Workaround

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