diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 54e3bb7..df4cc80 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -6899,4 +6899,26 @@
   wincmd q
 endfunc
 
+func Test_vimgrep_dummy_buffer_crash()
+  augroup DummyCrash
+    autocmd!
+    " Make the dummy buffer non-current, but still open in a window.
+    autocmd BufReadCmd * ++once let s:dummy_buf = bufnr()
+          \| split | wincmd p | enew
+
+    " Autocmds from cleaning up the dummy buffer in this case should be blocked.
+    autocmd BufWipeout *
+          \ call assert_notequal(s:dummy_buf, str2nr(expand('<abuf>')))
+  augroup END
+
+  silent! vimgrep /./ .
+  redraw! " Window to freed dummy buffer used to remain; heap UAF.
+  call assert_equal([], win_findbuf(s:dummy_buf))
+  call assert_equal(0, bufexists(s:dummy_buf))
+
+  unlet! s:dummy_buf
+  autocmd! DummyCrash
+  %bw!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab