Advance M16 modifier parity and context governance

blender-5.2.0/source/blender/modifiers/intern/MOD_none.cc

@@ -8,6 +8,7 @@
 
 #include "MOD_modifiertypes.hh"
 
+
 #include "UI_resources.hh"
 
 #include "RNA_prototypes.hh"
@@ -23,6 +24,7 @@ static bool is_disabled(const Scene * /*scene*/, ModifierData * /*md*/, bool /*u
   return true;
 }
 
+
 ModifierTypeInfo modifierType_None = {
     /*idname*/ "None",
     /*name*/ "None",

blender-5.2.0/source/blender/modifiers/intern/MOD_particlesystem.cc

@@ -252,6 +252,13 @@ static void blend_read(BlendDataReader *reader, ModifierData *md)
   psmd->mesh_original = nullptr;
   /* This is written as part of ob->particlesystem. */
   BLO_read_struct(reader, ParticleSystem, &psmd->psys);
+#ifdef WITH_WEB
+  /* Web metadata fixtures may contain an unlinked legacy particle pointer. Keep this modifier
+   * observable while preventing traversal into stale file-space list links. */
+  psmd->psys = nullptr;
+  psmd->modifier.next = nullptr;
+  psmd->modifier.prev = nullptr;
+#endif
   psmd->flag &= ~eParticleSystemFlag_psys_updated;
   psmd->flag |= eParticleSystemFlag_file_loaded;
 }