diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c
index f9cf083bc6..7069cafe38 100644
--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -1622,8 +1622,13 @@ create_unique_path(PlannerInfo *root, RelOptInfo *rel, Path *subpath,
 	pathnode->path.pathkeys = NIL;
 
 	pathnode->subpath = subpath;
-	pathnode->in_operators = sjinfo->semi_operators;
-	pathnode->uniq_exprs = sjinfo->semi_rhs_exprs;
+
+	/*
+	 * Under GEQO, the sjinfo might be short-lived, so we'd better make copies
+	 * of data structures we extract from it.
+	 */
+	pathnode->in_operators = copyObject(sjinfo->semi_operators);
+	pathnode->uniq_exprs = copyObject(sjinfo->semi_rhs_exprs);
 
 	/*
 	 * If the input is a relation and it has a unique index that proves the