patch 8.1.1671: copying a blob may result in it being locked commit https://github.com/vim/vim/commit/b7b9efbccfe17ee3f7b1bb877b7745d5bfbf0804 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 12 20:17:03 2019 +0200 patch 8.1.1671: copying a blob may result in it being locked Problem: Copying a blob may result in it being locked. Solution: Reset v_lock. (Ken Takata, closes https://github.com/vim/vim/issues/4648)

--- a/src/blob.c
+++ b/src/blob.c
@@ -63,6 +63,7 @@ blob_copy(typval_T *from, typval_T *to)
     int	    ret = OK;
 
     to->v_type = VAR_BLOB;
+    to->v_lock = 0;
     if (from->vval.v_blob == NULL)
 	to->vval.v_blob = NULL;
     else if (rettv_blob_alloc(to) == FAIL)