Fix T58652: Crash editing shape keys weirdness with instances

This is a second attempt to get the crash fixed. The original fix
worked, but it was reverted by d3e0d7f0825.

Now the logic goes as:

- All pointers which we can not have shared (the ones which are
  owned by the runtime) are cleared.
- The rest of runtime stays untouched.

This seems to be enough to keep particles happy.

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 9e4a7372010..fcd0bfa9ceb 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -700,8 +700,7 @@ Mesh *BKE_mesh_copy_for_eval(struct Mesh *source, bool reference)
 	int flags = (LIB_ID_CREATE_NO_MAIN |
 	             LIB_ID_CREATE_NO_USER_REFCOUNT |
 	             LIB_ID_CREATE_NO_DEG_TAG |
-	             LIB_ID_COPY_NO_PREVIEW |
-	             LIB_ID_COPY_RUNTIME);
+	             LIB_ID_COPY_NO_PREVIEW);
 
 	if (reference) {
 		flags |= LIB_ID_COPY_CD_REFERENCE;