1 files changed, 30 insertions, 1 deletions
diff --git a/test/functional/api/server_notifications_spec.lua b/test/functional/api/server_notifications_spec.lua
index 6791fbb4ba..88e8c60560 100644
--- a/test/functional/api/server_notifications_spec.lua
+++ b/test/functional/api/server_notifications_spec.lua
@@ -1,8 +1,9 @@
 -- Tests for nvim notifications
-local helpers = require('test.functional.helpers')
+local helpers = require('test.functional.helpers')(after_each)
 local eq, clear, eval, execute, nvim, next_message =
   helpers.eq, helpers.clear, helpers.eval, helpers.execute, helpers.nvim,
   helpers.next_message
+local meths = helpers.meths
 
 describe('notify', function()
   local channel
@@ -36,5 +37,33 @@ describe('notify', function()
       eval('rpcnotify(0, "event1", 13, 14, 15)')
       eq({'notification', 'event1', {13, 14, 15}}, next_message())
     end)
+
+    it('does not crash for deeply nested variable', function()
+      meths.set_var('l', {})
+      local nest_level = 1000
+      meths.command(('call map(range(%u), "extend(g:, {\'l\': [g:l]})")'):format(nest_level - 1))
+      eval('rpcnotify('..channel..', "event", g:l)')
+      local msg = next_message()
+      eq('notification', msg[1])
+      eq('event', msg[2])
+      local act_ret = msg[3]
+      local act_nest_level = 0
+      while act_ret do
+        if type(act_ret) == 'table' then
+          local cur_act_ret = nil
+          for k, v in pairs(act_ret) do
+            eq(1, k)
+            cur_act_ret = v
+          end
+          if cur_act_ret then
+            act_nest_level = act_nest_level + 1
+          end
+          act_ret = cur_act_ret
+        else
+          eq(nil, act_ret)
+        end
+      end
+      eq(nest_level, act_nest_level)
+    end)
   end)
 end)