Problem: Encryption implementation is messy. Blowfish encryption has a
weakness.
Solution: Refactor the encryption, store the state in an allocated struct
instead of using a save/restore mechanism. Introduce the
"blowfish2" method, which does not have the weakness and encrypts
the whole undo file. (largely by David Leadbeater)
Problem: Cannot wrap lines taking indent into account.
Solution: Add the 'breakindent' option. (many authors, final improvements by
Christian Brabandt)
Problem: Using a regexp pattern to highlight a specific position can be
slow.
Solution: Add matchaddpos() to highlight specific positions efficiently.
(Alexey Radkov)
Problem: When spell checking is enabled Asian characters are always marked
as error.
Solution: When 'spelllang' contains "cjk" do not mark Asian characters as
error. (Ken Takata)
Problem: Cannot right shift lines starting with #.
Solution: Allow the right shift when 'cino' contains #N with N > 0.
(Christian Brabandt)
Refactor parsing 'cino', store the values in the buffer.
Problem: Syntax highlighting can be slow.
Solution: Include the NFA regexp engine. Add the 'regexpengine' option to
select which one is used. (various authors, including Ken Takata,
Andrei Aiordachioaie, Russ Cox, Xiaozhou Liua, Ian Young)
Problem: Crash when using b:, w: or t: after closing the buffer, window or
tabpage.
Solution: Allocate the dictionary instead of having it part of the
buffer/window/tabpage struct. (Yukihiro Nakadaira)
Problem: It is possible to add replace builtin functions by calling
extend() on g:.
Solution: Add a flag to a dict to indicate it is a scope. Check for
existing functions. (ZyX)
Problem: When closing a window or buffer autocommands may close it too,
causing problems for where the autocommand was invoked from.
Solution: Add the w_closing and b_closing flags. When set disallow ":q" and
":close" to prevent recursive closing.
Problem: Memfile is not tested sufficiently. Looking up blocks in a
memfile is slow when there are many blocks.
Solution: Add high level test and unittest. Adjust the number of hash
buckets to the number of blocks. (Ivan Krasilnikov)
Problem: When writing a file in binary mode it may be missing the final EOL
if a file previously read was missing the EOL. (Kevin Goodsell)
Solution: Move the write_no_eol_lnum into the buffer struct.
Problem: maparg() doesn't return the flags, such as <buffer>, <script>,
<silent>. These are needed to save and restore a mapping.
Solution: Improve maparg(). (also by Christian Brabandt)
