Your description of the code location is good enough.

Could you attach a unit test that could be merged into the Hibernate code base (to avoid future regressions once we fix this?)

https://github.com/hibernate/hibernate-orm is the git repo for hibernate. If you add a test (see others under https://github.com/hibernate/hibernate-orm/tree/master/hibernate-infinispan/src/test), the following commands would help you build (probably need to use Java7):

git clone https://github.com/hibernate/hibernate-orm
cd hibernate-orm
./gradlew clean install test

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