vim-patch:8.2.0920: writing viminfo fails with a circular reference

Problem:    Writing viminfo fails with a circular reference.
Solution:   Use copyID to detect the cycle. (closes vim/vim#6217)
https://github.com/vim/vim/commit/5b157fe2edfdce5f77080aeac2b4a03f39eb1c1a

1 files changed, 2 insertions, 11 deletions

diff --git a/test/functional/shada/errors_spec.lua b/test/functional/shada/errors_spec.lua
index e8a01319d7..77a41caec7 100644
--- a/test/functional/shada/errors_spec.lua
+++ b/test/functional/shada/errors_spec.lua
@@ -1,7 +1,7 @@
 -- ShaDa errors handling support
 local helpers = require('test.functional.helpers')(after_each)
-local nvim_command, eq, exc_exec, redir_exec =
-  helpers.command, helpers.eq, helpers.exc_exec, helpers.redir_exec
+local nvim_command, eq, exc_exec =
+  helpers.command, helpers.eq, helpers.exc_exec
 
 local shada_helpers = require('test.functional.shada.helpers')
 local reset, clear, get_shada_rw =
@@ -494,15 +494,6 @@ $
     eq(0, exc_exec('wshada! ' .. shada_fname))
   end)
 
-  it('errors when a self-referencing list is stored in a variable', function()
-    nvim_command('let L = []')
-    nvim_command('call add(L, L)')
-    nvim_command('set shada+=!')
-    eq('\nE5005: Unable to dump variable g:L: container references itself in index 0'
-       .. '\nE574: Failed to write variable L',
-       redir_exec('wshada'))
-  end)
-
   it('errors with too large items', function()
     wshada({
         1, 206,  70,  90,  31, 179,  86, 133, 169, 103, 101, 110, 101, 114,  97,