Commit Graph

10012 Commits

Author SHA1 Message Date
glepnir
3e8a4e1092 feat(lsp): show color preview in completion items #32138
Problem: Color completion items display as plain text without visual preview

Solution: Parse RGB/hex colors from documentation and render with colored symbol ■
2026-02-28 10:02:52 -05:00
Nicknamess96
c1e60f36f3 fix(difftool): don't reset quickfix list when closing quickfix window #38088
Closing the quickfix window previously triggered a WinClosed autocmd
that deleted all difftool autocmds and pushed an empty quickfix list,
making the difftool non-functional. Users who close the quickfix window
to gain screen real estate for viewing diffs had no way to continue
navigating entries.

Remove the qf_win tracking and its associated WinClosed autocmd so that
closing the quickfix window no longer tears down the difftool state.
Closing either diff window still performs full cleanup as before.

The BufWinEnter handler no longer passes with_qf to diff_files, so
navigating entries while the quickfix window is closed reuses the
existing diff layout without forcing a layout rebuild.

Fixes #37388
2026-02-28 09:59:53 -05:00
luukvbaal
32e0d05d53 feat(ui2): configure targets per message kind #38091
Problem:  Unable to configure message targets based on message kind.
Solution: Add cfg.msg.targets mapping message kinds to "cmd/msg/pager".
          Check the configured target when writing the message.
          cfg.msg = { target = 'cmd', targets = { progress = 'msg', list_cmd = 'pager' } }
          will for example use the 'msg' target for progress messages,
          immediately open the pager for 'list_cmd' and use the cmdline
          for all other message kinds.
2026-02-28 08:31:02 -05:00
Sanzhar Kuandyk
b40ca5a01c fix(channel): support :detach, :restart on Windows #37977
fix: allocate hidden console for detached server

Starting the server with UV_PROCESS_DETACHED results in DETACHED_PROCESS, leaving the child without a console. Without a console:

CONIN$ / CONOUT$ cannot resolve, causing channel_from_stdio to fail.

ConPTY cannot attach, breaking :terminal.

This patch allocates a hidden console via AllocConsole() when the server has none, restoring working stdio and enabling ConPTY.

Also updates os_set_cloexec to clear HANDLE_FLAG_INHERIT on the RPC pipe
handles, matching the Unix F_DUPFD_CLOEXEC behavior.
2026-02-28 08:21:13 -05:00
glepnir
5943a81fe7 fix(float): style=minimal leaks into normal windows #25185
Problem: closing a minimal float saves its style-imposed options into
buffer's wininfo, which get picked up by normal windows on :bnext.

Solution: don't save window options to wininfo for style=minimal windows.
2026-02-28 13:20:56 +00:00
zeertzjq
7e8bdd348c vim-patch:9.2.0077: [security]: Crash when recovering a corrupted swap file (#38104)
Problem:  memline: a crafted swap files with bogus pe_page_count/pe_bnum
          values could cause a multi-GB allocation via mf_get(), and
          invalid pe_old_lnum/pe_line_count values could cause a SEGV
          when passed to readfile() (ehdgks0627, un3xploitable)
Solution: Add bounds checks on pe_page_count and pe_bnum against
          mf_blocknr_max before descending into the block tree, and
          validate pe_old_lnum >= 1 and pe_line_count > 0 before calling
          readfile().

Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-r2gw-2x48-jj5p

65c1a143c3

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 04:33:47 +00:00
zeertzjq
a416494e64 vim-patch:9.2.0078: [security]: stack-buffer-overflow in build_stl_str_hl() (#38102)
Problem:  A stack-buffer-overflow occurs when rendering a statusline
          with a multi-byte fill character on a very wide terminal.
          The size check in build_stl_str_hl() uses the cell width
          rather than the byte length, allowing the subsequent fill
          loop to write beyond the 4096-byte MAXPATHL buffer
          (ehdgks0627, un3xploitable).
Solution: Update the size check to account for the byte length of
          the fill character (using MB_CHAR2LEN).

Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-gmqx-prf2-8mwf

4e5b9e31cb

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 09:22:41 +08:00
zeertzjq
e85fc92a6b vim-patch:9.2.0075: [security]: Buffer underflow with emacs tag file
Problem:  When parsing a malformed Emacs-style tags file, a 1-byte
          heap-buffer-underflow read occurs if the 0x7f delimiter
          appears at the very beginning of a line. This happens
          because the code attempts to scan backward for a tag
          name from the delimiter without checking if space exists.
          (ehdgks0627, un3xploitable)
Solution: Add a check to ensure the delimiter (p_7f) is not at the
          start of the buffer (lbuf) before attempting to isolate
          the tag name.

GitHub Advisory:
https://github.com/vim/vim/security/advisories/GHSA-xcc8-r6c5-hvwv

9b7dfa2948

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 08:12:25 +08:00
zeertzjq
95ddabdb2b vim-patch:9.2.0074: [security]: Crash with overlong emacs tag file
Problem:  Crash with overlong emacs tag file, because of an OOB buffer
          read (ehdgks0627, un3xploitable)
Solution: Check for end of buffer and return early.

Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-h4mf-vg97-hj8j

f6a7f469a9

Cherry-pick a change from patch 9.0.0767.
Add missing change from patch 9.2.0070.

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 08:11:01 +08:00
zeertzjq
cd4c7850d0 vim-patch:9.2.0070: tests: various tests leave swapfiles around
Problem:  tests: various tests leave swapfiles around
Solution: close open buffers using :bw! instead of :close!

2fa34b6422

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 07:06:44 +08:00
zeertzjq
6ce964aed6 vim-patch:9.1.0539: Not enough tests for what v9.1.0535 fixed
Problem:  Not enough tests for what v9.1.0535 fixed
Solution: Add another test for ex-mode

This comes from: https://groups.google.com/g/vim_dev/c/F5-tDqoafz8/m/GqKF-uQsLD0J

related: vim/vim#15120

248efab9b5

Co-authored-by: Christian Brabandt <cb@256bit.org>
2026-02-28 07:04:49 +08:00
zeertzjq
453dfbf7d6 vim-patch:9.1.0535: newline escape wrong in ex mode
Problem:  newline escape wrong in ex mode (Konrad Schwarz)
Solution: partly revert patch 7.3.014, remove backslash in front of a
          newline when not in prompt mode in ex line mode
          (Mohamed Akram)

This fixes newline escaping to allow passing multiple commands to
":global", multiple lines to shell commands, and ending lines in append
mode with backslashes. This should fix a POSIX/(traditional) VI
incompatiblity.

This reverts a previous incorrect attempt at patch v7.3.014 to fix
append mode which removed half of trailing backslashes which lead to,
eg. the following two commands being parsed as having a different number
of backslashes:

```
!echo foo\\\
```

```
!echo foo\\ \
```

fixes: vim/vim#6135
fixes: vim/vim#7244
closes: vim/vim#15120

f3daa4525b

Co-authored-by: Mohamed Akram <mohd.akram@outlook.com>
2026-02-28 07:04:08 +08:00
Yochem van Rosmalen
dc5d313d66 fix(vim.fs): joinpath() should ignore empty items #38077
Problem:
vim.fs.joinpath treats empty string as a path segment
(it adds a path separator for each empty item):

    print(vim.fs.joinpath('', 'after/lsp', '')) -- '/after/lsp/'
    print(vim.fs.joinpath('', '')) -- '/'

Especially problematic if the empty segment is the first segment, as
that converts the path to an absolute path.

Solution:
Ignore empty (length of 0) path segments.

Benchmark:

    local function test(func)
      local t = vim.uv.hrtime()
      for _ = 1, 100000, 1 do
        func('', 'this/is', 'a/very/long/path', '', 'it', 'really', 'is')
      end
      print(math.floor((vim.uv.hrtime() - t) / 1e6), 'ms')
    end

- with Iter():filter() --> 370 ms
- building new segments table --> 208 ms
- with vim.tbl_filter --> 232 ms
- Instead of gsub split on `/` in all parts --> 1870 ms
2026-02-27 17:45:07 -05:00
Riccardo Mazzarini
2368a9edbd feat(terminal): support SGR dim, overline attributes #37997
Problem:
libvterm doesn't support parsing the dim and overline attributes, so when a program running in the embedded terminal emits one of these escape codes, we ignore it and don't surface it to the outer terminal.

Solution: tweak libvterm to add support for both attributes.
2026-02-27 11:46:22 +00:00
Kyle
5cbb9d613b fix(startup): wait for bg detection before user config #37075
Problem:
Automatic background detection sets the background option too late,
which loads colorschemes twice and causes problems when the user's
terminal background doesn't match the default (#32109, #36211, #36416).

Solution:
Use a DA1 query to determine whether the TTY supports OSC 11. Wait for
background detection and setting to complete before processing user
config.

Note: To preserve the existing behavior as much as possible, this triggers
OptionSet manually on VimEnter (since it won't trigger automatically if
we set bg during startup). However, I'm unsure if this behavior is
truly desired given that the documentation says OptionSet is triggered
"After setting an option (except during |startup|)."

Also fixes flickering issue #28667. To check for flickering:

    nvim --clean --cmd "set termguicolors" --cmd "echo \"foo\"" --cmd "sleep 10"

On master, this gives me a black screen for 10 seconds, but on this
branch, the background is dark or light depending on the terminal
background (since the option is now set during startup rather than after
VimEnter).
2026-02-27 04:52:52 -05:00
glepnir
f45c550f4e fix(restart): drop "-s <scriptfile>" from v:argv on :restart #38058
Problem: When nvim is started with "-s -" (read from stdin), ":restart"
drops the "-" argument but keeps "-s", leaving an orphaned "-s" in the
restarted server's argv, causing a crash.

Solution: Drop "-s" and its scriptfile argument when copying v:argv for
the restarted server. Like "-- [files…]", the scriptfile is a one-shot
startup input that should not be replayed on restart
2026-02-27 04:30:45 -05:00
Riccardo Mazzarini
ea5007b37f fix(lps): separate namespaces for pull/push diagnostics #37938
Problem:
Regression from b99cdd0:
Pull diagnostics (from `textDocument/diagnostic`) and push diagnostics
(from `textDocument/publishDiagnostics`) use the same namespace, which
is a problem when using language servers that publish two different sets
of diagnostics on push vs pull, like rust-analyzer (see
https://github.com/rust-lang/rust-analyzer/issues/18709#issuecomment-2551394047).

Solution:
Rename `is_pull` to `pull_id` which accepts a pull namespace instead of
just a boolean.
2026-02-26 12:05:30 -05:00
zeertzjq
7852993f49 vim-patch:9.2.0061: Not possible to know when a session will be loaded (#38071)
Problem:  Not possible to know when a session will be loaded.
Solution: Add the SessionLoadPre autocommand (Colin Kennedy).

fixes:  vim/vim#19084
closes: vim/vim#19306

1c0d468d72

Co-authored-by: Colin Kennedy <colinvfx@gmail.com>
2026-02-26 21:30:44 +08:00
zeertzjq
34b3bd1ac5 test(treesitter/fold_spec): fix flaky test (#38075) 2026-02-26 21:28:52 +08:00
luukvbaal
e63346dfe9 fix(messages): reset redirection message column at message start #38068
Problem:  Leading message newlines (not emitted with ext_messages since
          4260f73) were responsible for resetting the redirection message
          column (while the newline itself is later pruned...).
Solution: Ensure the redirection column is reset at the start of a message.
          (Instead of re-adjusting all the newline callsites which can
          themselves hopefully be pruned if ext_messages is enabled by
          default.)
2026-02-26 07:45:33 -05:00
bfredl
37c0efb21c fix(marktree): fix edge case bug regarding changing intersections
fix #37867

This bug happens when only one end is moved between different nodes,
but the other end is also moved but within the same node.
When this happens we need the correct previous position even for the
internal move. This code shall be refactored to make the intent clearer,
(and avoid some unnecessary processing) but this is a fix for the observable
bug.

Thanks to KevinGoodsell for providing a deterministic
reproduce using fuzzing techniques.
2026-02-26 10:30:41 +01:00
bfredl
3a4a7a7efb Merge pull request #37722 from bfredl/fastpackadd
perf(runtime): hardware accelerated "packadd opt_package"
2026-02-26 10:29:49 +01:00
anondeveg
6ba32713ad feat(secure): allow 'path' parameter for trust action 'allow' (#38001) 2026-02-25 20:55:05 -06:00
zeertzjq
e86ccdbeae test: remove remaining use of feed_command() in terminal/ (#38069)
Also deduplicate screen lines in some other tests.
2026-02-26 10:06:34 +08:00
luukvbaal
4ef217e272 fix(ui2): leftover empty lines in msg window #38059
Problem:  Timer removing a message from the msg buffer does not remove
          empty lines if window is closed (col([ui.wins.msg]) fails).
Solution: Use nvim_buf_get_text() to check if line is empty.
2026-02-25 13:21:30 -05:00
Justin M. Keyes
c0f8b3fb66 refactor(test): simplify v:argf tests #38055 2026-02-25 13:06:53 -05:00
zeertzjq
1983c70d10 test(lsp): flaky lsp/semantic_tokens_spec #38063
The wait added in #37853 doesn't seem to do anything as request is sent
immediately on InsertLeave, and the number 4 also seems wrong. Instead,
the actual cause for the flakiness that the feed() (and hence the buffer
change) may arrive before the scheduled initialization of capabilities,
causing there be only only one textDocument/semanticTokens/full request
instead of two.
2026-02-25 13:04:31 -05:00
bfredl
3aa04f7ee4 perf(runtime): hardware accelerated "packadd opt_package"
fixes #37586

when doing `packadd mypackage` up to two exact paths are added
to &rtp. Instead of recalculating runtime_search_path from scratch,
we can "just" splice these two paths in

This is simple in theory, but get complicated in practice as
"after" dirs do exist and need some wrangling.

Echasnovski did some benchmarking, to show that this reduces overhead
of a init.lua configuration style where separate `packadd!` calls are
used spread out during the config. In addition, "batched" addition
(either using "start" packages or packadd! a lot of opt packages at
once) does not regress.

A theoretical simplification could be to NEVER explicitly add "after"
dirs to &rtp, but implicitly add all existing "after" dirs in reverse
order when calculating the effective run time path. This might be tricky
to do without breaking 12 tpope plugins again tho.

We might also instead consider solutions where &rtp remains fully expanded but no longer is the main source of truth. But this is all post 0.12 work. This PR is an alright stopgap to make 0.12 fully support intended use cases of vim.pack.add() .
2026-02-25 09:39:54 +01:00
Sanzhar Kuandyk
cf874cee33 feat(startup): provide v:argf for file arguments #35889
Problem:
- `:args` and `argv()` can change after startup.
- `v:arg` includes options/commands, not just files.
- Plugins (e.g. Oil) may rewrite directory args.

Solution:
- New read-only var `v:argf`: snapshot of file/dir args at startup.
- Unaffected by `:args` or plugins.
- Unlike `v:argv`, excludes options/commands.
- Paths are resolved to absolute paths when possible

Example:

    nvim file1.txt dir1 file2.txt
    :echo v:argf
    " ['/home/user/project/file1.txt', '/home/user/project/dir1', '/home/user/project/file2.txt']
2026-02-25 03:38:08 -05:00
zeertzjq
327dcb8970 vim-patch:9.2.0046: filetype: neon files are not recoginzed (#38049)
Problem:  filetype: neon files are not recoginzed
Solution: Detect *.neon files as neon filetype
          (przepompownia)

Reference:
https://doc.nette.org/en/neon/format
https://github.com/fpob/nette.vim

closes: vim/vim#19496

ddd90672f2

Co-authored-by: przepompownia <przepompownia@users.noreply.github.com>
2026-02-25 07:53:43 +08:00
luukvbaal
844caca881 fix(ui2): multiline/color replaced message, expanded cmdline, error messages #38044
Problem:  - Unintentionally inserting lines for a replaced multiline
          message that also has multiple highlights.
          - Scheduled check to see if the expanded cmdline window was
          entered makes it difficult to keep track of what happens when
          the key pressed to dismiss it results in a message.
          - Reading the first line of an error message should be enough
          notice for something going wrong.
          - "search_cmd" messages should not be shown with 0 'cmdheight'.
          - Unable to configure dynamically changed pager height.
          - Enabling UI2 doesn't make sense with no UIs attached.

Solution: - Only insert a line for the first chunk after a newline.
          - Use getmousepos() to check if the expanded cmdline was
          clicked to enter the pager.
          entering the pager to serve as a configuration interface.
          - Don't expand the cmdline for error messages; user can press g<.
          - Don't show "search_cmd" messages with 'cmdheight' set to 0.
          - Change 'eventignorewin' to ensure WinEnter is fired when
          - Have enable() return early when no UIs are attached.
2026-02-24 17:05:38 -05:00
phanium
16aab4cb48 fix(treesitter): InspectTree only show the largest injection #37906
Problem:
:InspectTree don't show luadoc injection lua file. Since luadoc share
the same "root" with comment in their common primary (lua) tree.
Current logic simply show the largest (comment injection) and ignore all
smaller one (luadoc injection).

Solution:
Handle different lang injections separately. Then sort them by
byte_length to ensure the draw tree consistent.
2026-02-24 16:22:30 -05:00
luukvbaal
39c4e0f336 fix(messages): unwanted ext_messages newlines for confirm() #38045
Problem:  Newlines emitted with ext_messages intended to position
          the message/prompt on the message grid.
Solution: Don't emit these newlines with ext_messages, followup to 4260f73e.
2026-02-24 13:01:31 -05:00
glepnir
3115a18a80 refactor(test): lsp completion spec cleanup #38041
Problem: retry/feed/tbl_map patterns duplicated everywhere, detach check was a false negative

Solution: extract wait_for_pum/extract_word_abbr/word_sorter helpers,
fix assert_cleanup_after_detach with positive+negative pum confirmation
2026-02-24 09:20:58 -05:00
glepnir
5eb1c4df54 refactor(test): avoid deprecated functions #37017
Problem:
Tests are using some deprecated functions.

Solution:
Replace with command, pcall_err, etc.
2026-02-24 07:15:24 -05:00
Sean Dewar
32d3dd0650 fix(statusline): broken statusline on error #38000
Problem: after #33036, an error from evaluating 'statusline' clears it and
doesn't draw the statusline. (causing glitchy redraws)

Solution: use the default value instead. If 'stl' is somehow ever empty, still
call redraw_custom_statusline to at least draw an empty statusline.

Ideally our default 'stl' shouldn't itself error too! :-)
Also adjust some prior screen:expect()s to avoid immediate success warnings.
2026-02-23 11:22:13 -05:00
zeertzjq
f1490b5fe9 test: don't test overriding argv[0] using FFI (#38012)
Instead, test this by adding a new functionality to shell-test, allowing
reuse in other future tests.
2026-02-23 21:43:44 +08:00
zeertzjq
250d77cce7 test(terminal/scrollback_spec): fix flaky test (#38026)
When using feed_data() with hidden buffer, terminal refresh may arrive
during may_restore_curbuf(), causing "last cursor" positions to change.
Get the two "last cursor" positions in the same RPC call.
2026-02-23 13:51:37 +08:00
zeertzjq
ec24746406 test(core/channels_spec): fix flaky test (#38025)
If the last nvim_eval arrives on RPC channel before rpc_close_event() is
processed, it will be scheduled immediately after rpc_close_event() and
before free_channel_event(), causing the test to fail.
2026-02-23 04:26:38 +00:00
zeertzjq
1b013adff3 test(terminal/channel_spec): fix flaky test (#38023)
Adding input doesn't help here, as the important part here is processing
main_loop.events, not running the main loop. Instead, use a non-fast API
request to ensure that previously queued events are processed.
2026-02-23 01:48:15 +00:00
zeertzjq
14fe370564 fix(logging): don't overwrite NameBuff (#38004) 2026-02-23 08:00:26 +08:00
glepnir
f90cd620c5 fix(lsp): vim.lsp.completion clean up triggers on client detach (#38009)
Problem: LspDetach didn't clean up stale client refs in triggers table.

Solution: create LspDetach autocmd and call disable_completion.
2026-02-22 11:43:32 -08:00
zeertzjq
3f4ef487da vim-patch:9.2.0040: completion: preinsert wrong with register completion (#38003)
Problem:  completion: preinsert wrong with register completion
Solution: Remove preinserted text during register content insertion
          (Girish Palya).

fixes:  vim/vim#19329
closes: vim/vim#19474

3684ad83d1

Co-authored-by: Girish Palya <girishji@gmail.com>
2026-02-22 08:13:15 +08:00
wjyoung65
9aa936d892 test(ui): failure in lua/ui_spec.lua in headless OS (no GUI) #37975 2026-02-21 15:00:06 -05:00
zeertzjq
30d9970cd7 vim-patch:9.2.0036: completion: thesaurus completion incorrect with "longest/fuzzy" (#37996)
Problem:  completion: thesaurus completion incorrect with
          "longest/fuzzy" (Mao-Yining)
Solution: Disable fuzzy matching and longest-match insertion
          specifically for thesaurus completion (Girish Palya).

fixes:  vim/vim#19356
closes: vim/vim#19475

26a3f486cc

Co-authored-by: Girish Palya <girishji@gmail.com>
2026-02-21 19:54:25 +08:00
Riccardo Mazzarini
cb8c9186e6 feat(highlight): support more SGR attributes #37901
Problem:
TUI does not support several standard SGR text attributes:
- dim/faint (SGR 2)
- blink (SGR 5)
- conceal (SGR 8)
- overline (SGR 53)
This means that when a program running in the embedded terminal emits
one of these escape codes, we drop it and don't surface it to the
outer terminal.

Solution:
- Add support for those attributes.
- Also add corresponding flags to `nvim_set_hl` opts, so users can set
  these attributes in highlight groups.
  - refactor(highlight): widen `HlAttrFlags` from `int16_t` to `int32_t`
    Widen the `rgb_ae_attr` and `cterm_ae_attr` fields in HlAttrs from
    int16_t to int32_t to make room for new highlight attribute flags,
    since there was only one spare bit left.
  - The C flag is named HL_CONCEALED to avoid colliding with the
    existing HL_CONCEAL in syntax.h (which is a syntax group flag, not
    an SGR attribute).
- Also note that libvterm doesn't currently support the dim and overline
  attributes, so e.g. `printf '\e[2mThis should be dim\n'` and `printf
  '\e[53mThis should have an overline\n'` are still not rendered
  correctly when run from the embedded terminal.
2026-02-20 18:35:55 -05:00
zeertzjq
93a8acb1b8 vim-patch:9.2.0033: filetype: sh filetype used for env files
Problem:  filetype: sh filetype used for env files
Solution: Detect *.env and .env.* files as env filetype,
          detect .envrc and .envrc.* as sh filetype,
          include a simple env syntax script (DuckAfire)

Previously, .env files were handled by the shell syntax. While
functional, this limited the ability to support specific .env
implementations, such as CodeIgniter4 which allows dots in keys
(e.g., "foo.bar=0").

The new dedicated 'env' filetype and syntax script improves legibility
and prevents highlighting from breaking when encountering spaces.
Currently, the syntax does not support indentation; fields, variables,
and comments must start at the beginning of the line.

closes: vim/vim#19260

d0fa375629

Co-authored-by: DuckAfire <155199080+duckafire@users.noreply.github.com>
2026-02-20 09:26:07 +08:00
zeertzjq
c78e276881 vim-patch:9.2.0027: filetype: yara files are not recognized
Problem:  filetype: yara files are not recognized
Solution: Detect *.yara and *.yar files as yara filetype
          (Thomas Dupuy).

Reference:
- https://github.com/VirusTotal/yara
- https://github.com/VirusTotal/yara-x

closes: vim/vim#19460

7d93ae57f0

Co-authored-by: Thomas Dupuy <thom4s.d@gmail.com>
2026-02-20 09:17:46 +08:00
zeertzjq
6e8a1a8988 vim-patch:9.2.0032: completion: hang with line completion and fuzzy
Problem:  completion: hang with line completion and fuzzy (Jesse Pavel)
Solution: Only check the line number when wrapping around the file
          (Hirohito Higashi).

fixes:  vim/vim#19434
closes: vim/vim#19443

d8648f7279

Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
2026-02-20 09:01:20 +08:00
zeertzjq
08b8fe5ab3 vim-patch:9.2.0030: completion: non-prefix matches shown when leader is NULL
Problem:  When 'autocomplete' fires before compl_leader is initialized,
          the prefix filter is bypassed. This allows non-prefix matches
          (e.g. from fuzzy omnifuncs) to be shown in the popup menu and
          incorrectly preinserted.
Solution: In get_leader_for_startcol(), if compl_leader.string is NULL,
          fall back to using compl_orig_text as a filter for matches
	  starting at or after the completion column (Hirohito Higashi).

When 'autocomplete' first fires, compl_leader is NULL because
ins_compl_start() has not set it yet.  This caused the prefix filter in
ins_compl_build_pum(), find_next_completion_match() and
find_common_prefix() to be bypassed, allowing non-prefix fuzzy omnifunc
matches to appear in the PUM and be preinserted.

Extend get_leader_for_startcol() to fall back to compl_orig_text when
compl_leader.string is NULL: if the match's cpt source startcol is less
than compl_col the match includes pre-compl_col text, so return
&compl_leader (NULL string) to signal "pass through"; otherwise return
&compl_orig_text so callers filter by the original text.  The compl_col
<= 0 guard is kept only for the prepend-text path to avoid it
interfering with the NULL-leader fallback when compl_col is zero.

With this change all callers of get_leader_for_startcol() automatically
receive the correct filter string without additional helpers.

Also update Test_autocomplete_trigger Test 9 to reflect the new
behavior: 'faberge' is no longer shown when completing 'foo' because
it does not start with the current prefix.

Add Test_autocomplete_preinsert_null_leader() to verify that only
prefix-matching candidates appear in the PUM and are preinserted.

fixes:  vim/vim#19328
closes: vim/vim#19447

a04ae0210b

Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-02-20 08:58:41 +08:00