Don't use double ref vars in Debug derive #380
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Related to #289
Related to #328
Synopsis
While looking into #328 I realized the current situation around Pointer derives
and references was even weirder because we store a double-reference to the
fields in the local variables for Debug, but not for Display. The reason we
were doing this was because of #289.
Solution
This stops storing a double-reference, and only adds the additional reference
in the places where its needed.