vim-patch:9.0.0411: only created files can be cleaned up with one call

Problem:    Only created files can be cleaned up with one call.
Solution:   Add flags to mkdir() to delete with a deferred function.
            Expand the writefile() name to a full path to handle changing
            directory.

https://github.com/vim/vim/commit/6f14da15ac900589f2f413d77898b9bff3b31ece

vim-patch:8.2.3742: dec mouse test fails without gnome terminfo entry

Problem:    Dec mouse test fails without gnome terminfo entry.
Solution:   Check if there is a gnome entry. Also fix 'acd' test on
            MS-Windows. (Dominique Pellé, closes vim/vim#9282)

https://github.com/vim/vim/commit/f589fd3e1047cdf90566b68aaf9a13389e54d26a

Cherry-pick test_autochdir.vim changes from patch 9.0.0313.
Cherry-pick test_autocmd.vim changes from patch 9.0.0323.

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/nvim/eval/userfunc.c b/src/nvim/eval/userfunc.c
index 0a8e5c349a..808fb316fe 100644
--- a/src/nvim/eval/userfunc.c
+++ b/src/nvim/eval/userfunc.c
@@ -3153,6 +3153,17 @@ static int ex_defer_inner(char *name, char **arg, const partial_T *const partial
   return OK;
 }
 
+/// Return true if currently inside a function call.
+/// Give an error message and return FALSE when not.
+bool can_add_defer(void)
+{
+  if (get_current_funccal() == NULL) {
+    semsg(_(e_str_not_inside_function), "defer");
+    return false;
+  }
+  return true;
+}
+
 /// Add a deferred call for "name" with arguments "argvars[argcount]".
 /// Consumes "argvars[]".
 /// Caller must check that current_funccal is not NULL.