Subject: [PATCH] Integer underflow fix in fprintf in dsa.c.
---
Index: src/backend/utils/mmgr/dsa.c
<+>UTF-8
===================================================================
diff --git a/src/backend/utils/mmgr/dsa.c b/src/backend/utils/mmgr/dsa.c
--- a/src/backend/utils/mmgr/dsa.c	(revision b78fa8547d02fc72ace679fb4d5289dccdbfc781)
+++ b/src/backend/utils/mmgr/dsa.c	(date 1708426298001)
@@ -1107,7 +1107,7 @@
 
 			fprintf(stderr,
 					"    segment bin %zu (at least %d contiguous pages free):\n",
-					i, 1 << (i - 1));
+					i, i != 0 ? 1 << (i - 1) : 0);
 			segment_index = area->control->segment_bins[i];
 			while (segment_index != DSA_SEGMENT_INDEX_NONE)
 			{