patch 8.2.0633: crash when using null partial in filter()
Problem: Crash when using null partial in filter().
Solution: Fix crash. Add more tests. (Yegappan Lakshmanan, closes #5976)
diff --git a/src/testdir/test_fold.vim b/src/testdir/test_fold.vim
index 36de136..5a4632a 100644
--- a/src/testdir/test_fold.vim
+++ b/src/testdir/test_fold.vim
@@ -794,3 +794,28 @@
bwipe!
set foldmethod&
endfunc
+
+" Test for errors in 'foldexpr'
+func Test_fold_expr_error()
+ new
+ call setline(1, ['one', 'two', 'three'])
+
+ " Return a list from the expression
+ set foldexpr=[]
+ set foldmethod=expr
+ for i in range(3)
+ call assert_equal(0, foldlevel(i))
+ endfor
+
+ " expression error
+ set foldexpr=[{]
+ set foldmethod=expr
+ for i in range(3)
+ call assert_equal(0, foldlevel(i))
+ endfor
+
+ set foldmethod& foldexpr&
+ close!
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab