vim-patch:8.2.0135: bracketed paste can still cause invalid memory access

Problem:    Bracketed paste can still cause invalid memory access. (Dominique
            Pelle)
Solution:   Check for NULL pointer.
fe4bbac116

src/nvim/testdir/test_search.vim

@@ -700,6 +700,7 @@ func Test_search_display_pattern()
 endfunc
 
 func Test_search_special()
-  " this was causing illegal memory access
+  " this was causing illegal memory access and an endless loop
+  set t_PE=
   exe "norm /\x80PS"
 endfunc