Thread.single_step field, anything using it?

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Thread.single_step field, anything using it?

Alan Bateman
I've been going through the fields in java.lang.Thread and I'm wondering
if this field can be removed:

     /* Whether or not to single_step this thread. */
     private boolean     single_step;

This field was used in the original Classic VM (pre-OpenJDK history). It
doesn't appear to be used in the HotSpot VM.

Does anyone know of any reason to keep it? Are there other VMs using it
by any chance?

-Alan