vim-patch:9.0.0260: using freed memory when using 'quickfixtextfunc' recursively

Problem:    Using freed memory when using 'quickfixtextfunc' recursively.
Solution:   Do not allow for recursion.
https://github.com/vim/vim/commit/d6c67629ed05aae436164eec474832daf8ba7420

Cherry-pick Test_qflist_statusmsg() from patch 8.2.4617.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index d364cebc9d..d680ab8cf3 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -3984,6 +3984,12 @@ static list_T *call_qftf_func(qf_list_T *qfl, int qf_winid, long start_idx, long
 {
   Callback *cb = &qftf_cb;
   list_T *qftf_list = NULL;
+  static bool recursive = false;
+
+  if (recursive) {
+    return NULL;  // this doesn't work properly recursively
+  }
+  recursive = true;
 
   // If 'quickfixtextfunc' is set, then use the user-supplied function to get
   // the text to display. Use the local value of 'quickfixtextfunc' if it is
@@ -4017,6 +4023,7 @@ static list_T *call_qftf_func(qf_list_T *qfl, int qf_winid, long start_idx, long
     tv_dict_unref(dict);
   }
 
+  recursive = false;
   return qftf_list;
 }