# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1562956206 -7200
# Node ID a0eb2ff0f297fb7d72eec2cd1ddd2a5220ef89eb
# Parent  ba366c7e8d148295abbd7a37771f726fc356f50c
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)

diff --git a/src/blob.c b/src/blob.c
--- 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)
diff --git a/src/testdir/test_blob.vim b/src/testdir/test_blob.vim
--- a/src/testdir/test_blob.vim
+++ b/src/testdir/test_blob.vim
@@ -71,6 +71,10 @@ func Test_blob_assign()
   call assert_fails('let b .= "xx"', 'E734:')
   call assert_fails('let b += "xx"', 'E734:')
   call assert_fails('let b[1:1] .= 0z55', 'E734:')
+
+  let l = [0z12]
+  let m = deepcopy(l)
+  let m[0] = 0z34	" E742 or E741 should not occur.
 endfunc
 
 func Test_blob_get_range()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1671,
+/**/
     1670,
 /**/
     1669,