diff -Naur blender-2.68a-original/source/blender/makesdna/intern/dna_genfile.c blender-2.68a/source/blender/makesdna/intern/dna_genfile.c
--- blender-2.68a-original/source/blender/makesdna/intern/dna_genfile.c 2013-03-17 10:38:58.000000000 -0400
+++ blender-2.68a/source/blender/makesdna/intern/dna_genfile.c 2022-04-04 14:27:54.716949756 -0400
@@ -210,7 +210,9 @@
MEM_freeN(sdna->structs);
#ifdef WITH_DNA_GHASH
- BLI_ghash_free(sdna->structs_map, NULL, NULL);
+ if (sdna->structs_map) {
+ BLI_ghash_free(sdna->structs_map, NULL, NULL);
+ }
#endif
MEM_freeN(sdna);