Commitad87ba1

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prevent use-after-free reported by sparc64

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Original file line number	Diff line number	Diff line change
`@@ -874,6 +874,10 @@ create_partitions_internal(Oid relid, Datum value, Oid value_type)`
`874`	`874`	`min_rvalue=PrelGetRangesArray(prel)[0].min;`
`875`	`875`	`max_rvalue=PrelGetRangesArray(prel)[PrelLastChild(prel)].max;`
`876`	`876`
	`877`	`+/* Copy datums on order to protect them from cache invalidation */`
	`878`	`+min_rvalue=datumCopy(min_rvalue,prel->attbyval,prel->attlen);`
	`879`	`+max_rvalue=datumCopy(max_rvalue,prel->attbyval,prel->attlen);`
	`880`	`+`
`877`	`881`	`/* Retrieve interval as TEXT from tuple */`
`878`	`882`	`interval_text=values[Anum_pathman_config_range_interval-1];`
`879`	`883`

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