SetupOperatorNewDeleteCheck is a build-time check for use of the global operator new and delete operations, which we're not supposed to be doing in Hotspot. There is a comment describing how to find such references when they are reported. However, if the warning is for a "deleting destructor", the reference is non-obvious even then, and can be quite puzzling if one isn't already familiar with that term and its meaning. It would be helpful to add a comment about deleting destructors, their cause, and how to recognize them.