RFR: 8251850: Simplify ResourceMark constructors using delegation

[Kim Barrett]

> On Aug 17, 2020, at 10:44 PM, David Holmes <david.holmes at oracle.com> wrote:
> 
> Hi Kim,
> 
> Not a full review - sorry. Have you tested what happens if a resource leak is introduced? The _warned variable was used, IIUC, to avoid hitting recursive errors during error reporting.

OH!  The recursive case hadn’t occurred to me!

Poorly named and poorly commented variable from before the beginning of the mercurial age,
so hard to track down the changeset that introduced it to see if that shed some light.  Good
thing we have some institutional memory :)

I will do something about that, and then try to figure out how to trigger it.