--- a/src/backend/storage/ipc/dsm_impl.c
+++ b/src/backend/storage/ipc/dsm_impl.c
@@ -249,2 +249,5 @@ dsm_impl_posix(dsm_op op, dsm_handle handle, Size request_size,
 
+	if (handle == 1804289383)
+		elog(ERROR, "generated handle with no randomness");
+
 	snprintf(name, 64, "/PostgreSQL.%u", handle);