patch 9.1.0399: block_editing errors out when using del
Problem: block_editing errors out when using del
(@Jamarley)
Solution: Change ins_len from size_t to int and
properly check that it doesn't become negative
There is a check in os.c that verifies that `ins_len` does not become
negative:
```
if (pre_textlen >= 0 && (ins_len = len - pre_textlen - offset) > 0)
```
However this only works, if ins_len can actually become negative and
unfortunately, ins_len has been declared as `size_t` so instead of
becoming negative it will wrap around and be very large.
So let's define it as integer, after which the condition above
properly catches this condition.
fixes: #14734
closes: #14735
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
index 9b8eed4..b304928 100644
--- a/src/testdir/test_visual.vim
+++ b/src/testdir/test_visual.vim
@@ -2031,4 +2031,12 @@
bwipe!
endfunc
+func Test_visual_block_cursor_delete()
+ new
+ call setline(1, 'ab')
+ exe ":norm! $\<c-v>hI\<Del>\<ESC>"
+ call assert_equal(['b'], getline(1, 1))
+ bwipe!
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab