---
 texk/web2c/pdftexdir/tounicode.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- texk/web2c/pdftexdir/tounicode.c
+++ texk/web2c/pdftexdir/tounicode.c	2024-04-02 00:00:00.000000000 +0000
@@ -535,10 +535,17 @@ void undumptounicode(void)
         void **result;
         glyph_unicode_entry *gu = new_glyph_unicode_entry();
         undumpcharptr(gu->name);
+        if (gu->name == NULL) {
+            pdftex_fail("undumpcharptr(gu->name) got NULL");
+        }
         generic_undump(gu->code);
 
-        if (gu->code == UNI_STRING)
+        if (gu->code == UNI_STRING) {
             undumpcharptr(gu->unicode_seq);
+            if (gu->unicode_seq == NULL) {
+                pdftex_fail("undumpcharptr(gu->unicode_seq) got NULL");
+            }
+        }
 
         result = avl_probe(glyph_unicode_tree, gu);
         assert(*result == gu);