Pieter created SOLR-15031:
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Summary: NPE caused by FunctionQParser returning a null ValueSource
Key: SOLR-15031
URL: https://issues.apache.org/jira/browse/SOLR-15031
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Pieter
When parsing a sub query in a function query,
{{FunctionQParser#parseValueSource}} does not check if the produced query
object is null. When it is, it just wraps a null in a {{QueryValueSource}}
object. This is a cause for NPE's in code consuming that object. Parsed queries
can be null, for example when the query string only contains stopwords (see
steps to reproduce for an example), so we need handle that condition.
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