Commit: patch 9.0.2030: no max callback recursion limit

[Christian Brabandt]

patch 9.0.2030: no max callback recursion limit

Commit: https://github.com/vim/vim/commit/47510f3d6598a1218958c03ed11337a43b73f48d
Author: Christian Brabandt <c...@256bit.org>
Date: Sun Oct 15 09:56:16 2023 +0200

patch 9.0.2030: no max callback recursion limit

Problem: no max callback recursion limit
Solution: bail out, if max call recursion for callback functions
has been reached.

This checks the 'maxfuncdepth' setting and throws E169 when a callback
function recursively calls itself.

closes: #13337
closes: #13339

Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 502e77ba1..492c7da1e 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 9.0. Last change: 2023 Aug 15
+*options.txt* For Vim version 9.0. Last change: 2023 Oct 14


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -5485,6 +5485,7 @@ A jump table for the options with a short description can be found at |Q_op|.
Increasing this limit above 200 also changes the maximum for Ex
command recursion, see |E169|.
See also |:function|.
+ Also used for maximum depth of callback functions.

*'maxmapdepth'* *'mmd'* *E223*
'maxmapdepth' 'mmd' number (default 1000)
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 60dc5d9b9..a256ddfb2 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -4205,5 +4205,11 @@ func Test_popupwin_with_error()
call StopVimInTerminal(buf)
endfunc

+func Test_popup_close_callback_recursive()
+ " this invokes the callback recursively
+ let winid = popup_create('something', #{callback: 'popup_close'})
+ redraw
+ call assert_fails('call popup_close(winid)', 'E169')
+endfunc

" vim: shiftwidth=2 sts=2
diff --git a/src/userfunc.c b/src/userfunc.c
index db16b6804..a3b8bdc10 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -3583,6 +3583,13 @@ call_callback(

if (callback->cb_name == NULL || *callback->cb_name == NUL)
return FAIL;
+
+ if (callback_depth > p_mfd)
+ {
+ emsg(_(e_command_too_recursive));
+ return FAIL;
+ }
+
CLEAR_FIELD(funcexe);
funcexe.fe_evaluate = TRUE;
funcexe.fe_partial = callback->cb_partial;
diff --git a/src/version.c b/src/version.c
index ec9a07d07..b90f76fc1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 2030,
/**/
2029,
/**/