ClassCastExceptions in o.a.s.s.facet.FacetModule for valid JSON inputs that are not objects

Running on Unix, using a git checkout close to master. Steps to reproduce  * Build commit ea2c8ba of Solr as described in the section below.  * Build the films collection as described below.  * Start the server using the command “./bin/solr start -f -p 8983 -s /tmp/home”  * Request the URL above. Compiling the server git clone https://github.com/apache/lucene-solr cd lucene-solr git checkout ea2c8ba ant compile cd solr ant server Building the collection We followed Exercise 2 from the quick start tutorial ( http://lucene.apache.org/solr/guide/7_5/solr-tutorial.html#exercise-2 ) - for reference, I have attached a copy of the database. mkdir -p /tmp/home echo '<?xml version="1.0" encoding="UTF-8" ?><solr></solr>' > /tmp/home/solr.xml In one terminal start a Solr instance in foreground: ./bin/solr start -f -p 8983 -s /tmp/home In another terminal, create a collection of movies, with no shards and no replication: bin/solr create -c films curl -X POST -H 'Content-type:application/json' --data-binary '\\{"add-field": {"name":"name", "type":"text_general", "multiValued":false, "stored":true}}' http://localhost:8983/solr/films/schema curl -X POST -H 'Content-type:application/json' --data-binary '\{"add-copy-field" : {"source":"*","dest":"_text_"}}' [http://localhost:8983/solr/films/schema] ./bin/post -c films example/films/films.json