[perl #46663] [TODO] [C] Is call to set_pmc_keyed_str() too late for --gc-debug in setprop()?

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In src/pmc/default.pmc:setprop() there is the todo item:

            /* XXX is this too late for --gc-debug? */
            VTABLE_set_pmc_keyed_str(INTERP, prop, key, value);

Um, something needs to be done here, but I'm not sure what.  I hope that
someone wiser than me on parrot-porters can expand upon the ramifications
of this todo item.