# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1637766903 -3600
# Node ID 2484d6d9616629fe51bad8a8e58199a1f3c08a04
# Parent  4aee351f48a4b84f6ff5bb66758eec95d9f91f85
patch 8.2.3662: illegal memory access if malloc() fails

Commit: https://github.com/vim/vim/commit/cf1e0239ceec96396fa51f494e442c799ccd45fb
Author: Bram Moolenaar <Bram@vim.org>
Date:   Wed Nov 24 15:13:26 2021 +0000

    patch 8.2.3662: illegal memory access if malloc() fails

    Problem:    Illegal memory access if malloc() fails.
    Solution:   Check 'foldmethod' is not empty. (closes https://github.com/vim/vim/issues/9207)

diff --git a/src/fold.c b/src/fold.c
--- a/src/fold.c
+++ b/src/fold.c
@@ -307,7 +307,7 @@ foldedCount(win_T *win, linenr_T lnum, f
     int
 foldmethodIsManual(win_T *wp)
 {
-    return (wp->w_p_fdm[3] == 'u');
+    return (wp->w_p_fdm[0] != NUL && wp->w_p_fdm[3] == 'u');
 }
 
 // foldmethodIsIndent() {{{2
@@ -327,7 +327,7 @@ foldmethodIsIndent(win_T *wp)
     int
 foldmethodIsExpr(win_T *wp)
 {
-    return (wp->w_p_fdm[1] == 'x');
+    return (wp->w_p_fdm[0] != NUL && wp->w_p_fdm[1] == 'x');
 }
 
 // foldmethodIsMarker() {{{2
@@ -337,7 +337,7 @@ foldmethodIsExpr(win_T *wp)
     int
 foldmethodIsMarker(win_T *wp)
 {
-    return (wp->w_p_fdm[2] == 'r');
+    return (wp->w_p_fdm[0] != NUL && wp->w_p_fdm[2] == 'r');
 }
 
 // foldmethodIsSyntax() {{{2
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3662,
+/**/
     3661,
 /**/
     3660,