patch 8.2.3169: Vim9: cannot handle nested inline function

Problem:    Vim9: cannot handle nested inline function.
Solution:   Check for nested inline function. (closes #8575)
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index ae48a89..cd6ffa4 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -2082,7 +2082,8 @@
       var Func = (nr: number): int => {
               return nr
   END
-  CheckDefAndScriptFailure(lines, 'E1171', 1)  # line nr is function start
+  CheckDefFailure(lines, 'E1171', 0)  # line nr is function start
+  CheckScriptFailure(['vim9script'] + lines, 'E1171', 2)
 
   lines =<< trim END
       var Func = (nr: number): int => {