postgres
diff --git a/‎contrib/hstore/hstore_io.c
Copy file name to clipboardExpand all lines: contrib/hstore/hstore_io.c
+2-1Lines changed: 2 additions & 1 deletion b/‎contrib/hstore/hstore_io.c
Copy file name to clipboardExpand all lines: contrib/hstore/hstore_io.c
+2-1Lines changed: 2 additions & 1 deletion
@@ -340,7 +340,8 @@ hstoreUniquePairs(Pairs *a, int32 l, int32 *buflen)
 		{
 			*buflen += res->keylen + ((res->isnull) ? 0 : res->vallen);
 			res++;
-			memcpy(res, ptr, sizeof(Pairs));
+			if (res != ptr)
+				memcpy(res, ptr, sizeof(Pairs));
 		}
 
 		ptr++;
Original file line number	Diff line number	Diff line change
`@@ -340,7 +340,8 @@ hstoreUniquePairs(Pairs a, int32 l, int32 buflen)`
`340`	`340`	`{`
`341`	`341`	`*buflen += res->keylen + ((res->isnull) ? 0 : res->vallen);`
`342`	`342`	`res++;`
`343`		`- memcpy(res, ptr, sizeof(Pairs));`
	`343`	`+ if (res != ptr)`
	`344`	`+ memcpy(res, ptr, sizeof(Pairs));`
`344`	`345`	`}`
`345`	`346`
`346`	`347`	`ptr++;`