memoryrefunset fixes (#61872)

Address code review from @vtjnash on
https://github.com/JuliaLang/julia/pull/61759/changes#diff-07a80d46bd00f903348b4df9f5e0e2d88f5a2263f7115e200ed99c19064adb11
from after the PR merged.

Oscar Smith committed 3mo ago

019807b1a3cf972852e2ee12dd322ab6a4340db0

Parent: e98fbb4

Committed by GitHub <noreply@github.com> on 5/21/2026, 11:23:16 PM