I was just mailed a bug update and it included this text (spelling mistakes theirs, not mine).
Note customer is on Linux but could not find an available 11.2 Linux database to test on. Reprocided problem on Solaris confirming that there is some generic problem here.
And here’s me thinking that firing up a VM with any version of Linux & Oracle was quick and easy. Perhaps their VMs are running on Amazon, hence the lack of available systems.