patch 8.2.0274: hang with combination of feedkeys(), Ex mode and :global

Problem:    Hang with combination of feedkeys(), Ex mode and :global.
            (Yegappan Lakshmanan)
Solution:   Add the pending_exmode_active flag.
diff --git a/src/testdir/test_ex_mode.vim b/src/testdir/test_ex_mode.vim
index bf10104..910c1a6 100644
--- a/src/testdir/test_ex_mode.vim
+++ b/src/testdir/test_ex_mode.vim
@@ -111,4 +111,12 @@
   close!
 endfunc
 
+func Test_Ex_feedkeys()
+  " this doesn't do anything useful, just check it doesn't hang
+  new
+  call setline(1, ["foo"])
+  call feedkeys("Qg/foo/visual\<CR>", "xt")
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab