vim-patch:8.1.0756: copy() does not make a copy of a Blob

Problem:    copy() does not make a copy of a Blob.
Solution:   Make a copy.
https://github.com/vim/vim/commit/3d28b58c519c9fc3427587201423c74746cc219e

Replace vim_memsave() with xmemdup().

1 files changed, 13 insertions, 1 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index eb8f0406c4..35c3b1b876 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -9700,7 +9700,6 @@ int var_item_copy(const vimconv_T *const conv,
   case VAR_PARTIAL:
   case VAR_BOOL:
   case VAR_SPECIAL:
-  case VAR_BLOB:
     tv_copy(from, to);
     break;
   case VAR_STRING:
@@ -9734,6 +9733,19 @@ int var_item_copy(const vimconv_T *const conv,
       ret = FAIL;
     }
     break;
+  case VAR_BLOB:
+    to->v_type = VAR_BLOB;
+    if (from->vval.v_blob == NULL) {
+      to->vval.v_blob = NULL;
+    } else {
+      tv_blob_alloc_ret(to);
+      const int len = from->vval.v_blob->bv_ga.ga_len;
+
+      to->vval.v_blob->bv_ga.ga_data
+          = xmemdup(from->vval.v_blob->bv_ga.ga_data, (size_t)len);
+      to->vval.v_blob->bv_ga.ga_len = len;
+    }
+    break;
   case VAR_DICT:
     to->v_type = VAR_DICT;
     to->v_lock = VAR_UNLOCKED;