Bytecode enhanced lazy collection won't load from cache

Fixed in 5.1 branch as well.

, does this affect 5.1 and/or 5.0 branches as well?

Thanks for pointing that out!

I have updated my PR to account for unfetched properties, but to avoid messing too much with the existing Type hierarchy, I've choose to do it in TypeHelper#toLoggableString() instead.
That fix was then extended to types that hold other types [ ArrayType CollectionType ComponentType ] and some other generic types as well [ AbstractStandardBasicType AnyType ]
From my inspection on the Hibernate code, that should cover all the cases!

While updating our application to Hibernate 5.2.3 we've encountered this issue with primitive property fields annotated with @Basic(fetch = FetchType.LAZY).

In a forked repo I've applied a similar fix to the one in your pull request @Luis Barreiro to the following classes

• hibernate-core/src/main/java/org/hibernate/type/BinaryType.java

• hibernate-core/src/main/java/org/hibernate/type/MaterializedBlobType.java

• hibernate-core/src/main/java/org/hibernate/type/MaterializedClobType.java

• hibernate-core/src/main/java/org/hibernate/type/MaterializedNClobType.java

A better solution may be to have a new class in the hierarchy that handles lazy property fields

BinaryType -> extends -> AbstractLazySingleColumnStandardBasicType -> extends -> AbstractSingleColumnStandardBasicType

While doing this it would be good to make the BasicType and Type interfaces generic

Yes, I foresee an easy fix, but I want to run your test case to make sure there is not something else broken.