fix(tests): fixes for using vim.mpack and more ASAN

test/functional/api/rpc_fixture.lua

@@ -4,9 +4,8 @@
 package.path = arg[1]
 package.cpath = arg[2]
 
-local mpack = require('mpack')
-local StdioStream = require('nvim.stdio_stream')
-local Session = require('nvim.session')
+local StdioStream = require'test.client.uv_stream'.StdioStream
+local Session = require'test.client.session'
 
 local stdio_stream = StdioStream.open()
 local session = Session.new(stdio_stream)
@@ -19,7 +18,7 @@ local function on_request(method, args)
     return "done!"
   elseif method == "exit" then
     session:stop()
-    return mpack.NIL
+    return vim.NIL
   end
 end
 

test/functional/api/server_requests_spec.lua

@@ -237,7 +237,7 @@ describe('server -> client', function()
         \ }
       ]])
       meths.set_var("args", {
-        helpers.test_lua_prg,
+        nvim_prog, '-ll',
         'test/functional/api/rpc_fixture.lua',
         package.path,
         package.cpath,

test/functional/api/vim_spec.lua

@@ -59,7 +59,7 @@ describe('API', function()
 
     -- XXX: This must be the last one, else next one will fail:
     --      "Packer instance already working. Use another Packer ..."
-    matches("can't serialize object$",
+    matches("can't serialize object of type .$",
       pcall_err(request, nil))
   end)