commit 1b3e0727ce86ca4cfa47f8b5421d82ed47a9bec1
author Bram Moolenaar <Bram@vim.org> Tue Dec 08 21:12:40 2020 +0100
committer Bram Moolenaar <Bram@vim.org> Tue Dec 08 21:12:40 2020 +0100
tree 13be53f6af0250dc0defbc469eb77a75ec61eefc
parent ac665c24c97582a64ae2d151a812eca92c1ff2d6

patch 8.2.2113: MS-Windows GUI: crash after using ":set guifont=" four times

Problem:    MS-Windows GUI: crash after using ":set guifont=" four times.
Solution:   Check for NULL pointer. (Ken Takata, closes #7434)

src/testdir/test_gui.vim

diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index 89ec3a9..6d750e0 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -386,6 +386,13 @@
   if has('win32')
     " Invalid font names are accepted in GTK GUI
     call assert_fails('set guifont=xa1bc23d7f', 'E596:')
+
+    " doing this four times used to cause a crash
+    set guifont=
+    set guifont=
+    set guifont=
+    set guifont=
+    set guifont=
   endif
 
   if has('xfontset')