From bd11364234cd382c375da42eaf88b214c4e56cc1 Mon Sep 17 00:00:00 2001
From: Krasimir Angelov <kr.angelov@gmail.com>
Date: Fri, 27 Jan 2023 08:34:17 +0100
Subject: [PATCH] prevent possible crash

---
 src/runtime/c/pgf/pgf.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/runtime/c/pgf/pgf.cxx b/src/runtime/c/pgf/pgf.cxx
index a2c86c4b0..3e7700df8 100644
--- a/src/runtime/c/pgf/pgf.cxx
+++ b/src/runtime/c/pgf/pgf.cxx
@@ -1201,7 +1201,9 @@ PgfRevision pgf_start_transaction(PgfDB *db, PgfExn *err)
         new_pgf->major_version = pgf->major_version;
         new_pgf->minor_version = pgf->minor_version;
         new_pgf->gflags = pgf->gflags;
-        new_pgf->abstract.name = textdup_db(ref<PgfText>::from_ptr(&(*pgf->abstract.name)));
+        ref<PgfText> new_name =
+            textdup_db(ref<PgfText>::from_ptr(&(*pgf->abstract.name)));
+        new_pgf->abstract.name = new_name;
         new_pgf->abstract.aflags = pgf->abstract.aflags;
         new_pgf->abstract.funs = pgf->abstract.funs;
         new_pgf->abstract.cats = pgf->abstract.cats;