[v632][hist] prevent nullptr access with copy from default constructor #16863
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before allocating new memory, make sure we delete potentially existing one previously
to avoid segviolation when calling copy-this
guitargeek
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pcanal
approved these changes
Nov 7, 2024
guitargeek
merged commit 0bd83ea
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root-project:v6-32-00-patches
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Backport of #16773.