NVIM v0.12.3

Following is a list of commits (fixes/features only) in this release.
See `:help news` in Nvim for release notes.

BREAKING
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- f54f566bf8 diagnostic: deprecate `format` as a table

FEATURES
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- fd1b193d51 :restart: v:starttime, v:exitreason #39319
- c407e3e67b eval: treat Lua string as "blob" in writefile() #39098
- a0dcdcd8a0 treesitter: provide select()
- 49efe692f3 vim.pos: accept buf=0 for current buf #39414
- ad27075c8d vim.pos: pos:to_offset(), pos.offset() (#39639)
- b05675bccc `opts.scope` in `vim.ui.input` (#39906)

PERFORMANCE
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- 96d5dd4107 vim.pos: use numeric index internally #39447

FIXES
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- e230ff0439 vim._with may silence all cmdline-errors #34301
- 781c43ea05 api: adjust Visual position after nvim_buf_set_text #30690
- 5b8268356a api: don't update 'title' when renaming non-curbuf #39743
- 4df16ecdb9 api: `LuaRef` leak in `nvim_set_keymap` on LHS too long (>=66 bytes) (#39376)
- e5d6d2e769 api: leak `preview` callback `LuaRef` in `nvim_create_user_command` (#39377)
- f0baa18043 channel: stack-buffer-overflow with exit during connection (#39387)
- d9baaf7da1 ci: generate more data to stress output throttling test #39577
- f62ce1a42f difftool: handle filenames containing spaces #39740
- fb56d50032 eval: writestring() handling of null #39328
- 822778f7e5 excmd: use realtime for v:starttime, :uptime #39425
- 8fccb26cd3 fold: virtual lines duplicate foldopen (#39891)
- 10695f44af health: set 'tags' for help filetype #39742
- e069022215 help: fix CTRL character issue for :help {subject} #39537
- 445fe8a6b7 lsp: calc correct screen_width when opts.relative == 'editor' (#39977)
- 93dc301781 lsp: callHierarchy/outgoingCalls ranges are relative to caller, not callee #39336
- 5e6c8d4edf lsp: check window is still valid after async request #39396
- 8919b02eba lsp: dynamic registration for off-spec method #39544
- c4d3a3d363 lsp: filter code_action diagnostics to the cursor #38988
- 27d01f2dbb lsp: handle null id in JSON-RPC responses
- aedbae4ab6 lsp: handle self-mapped methods in supports_method #39383
- 0bd6e62509 lsp: malformed edit if apply_text_edits() is called twice (#39347)
- 378f5f49b3 lsp: show meaningful error on invalid completion response (#39476)
- c9ca59ad28 lsp: util.lua attempt to concatenate userdata #39510
- e67f9c5853 lua: avoid `__index` when deciding if a table is a list #39556
- 731f9743e2 lua: don't strip debuginfo in precompile module #39191
- b0bfce290f lua: fields of `nvim.spellfile.Opts` are optional #39902
- 34bf0472ab marks: don't use spell decorations from other lines (#39441)
- d1cf3ab4c3 marks: read from the correct variable in conceal_lines mark collection (#39991)
- 33b6b0bfe5 messages: avoid recursive rtp build due to msg_show #39888
- d725ead5ec messages: reset redirection message column after :echon #39472
- b490fba786 mouse: mouse=n should not adjust visual selection
- 17ddfde131 net: `:edit <uri>` should set buftype=nofile #39915
- dd95e434e3 pack: only use tags that strictly comply with semver spec #39342
- 585c93204f path: `nvim_get_runtime_file` fails on DOS 8.3 filename #40144
- 42f6c1c443 prompt: handle multi-element lists in prompt_appendbuf #39550
- 915880d252 shada: bdelete'd buffers not stored in oldfiles #39070
- e4a9bd55b2 shada: set correct buffer number for local marks on read #39712
- 2389cf2e39 shell: preserve CR when `:!` outputs to binary-mode buffer #39558
- 98098d8466 startup: emitting useless OptionSet
- ae9f7accdd statusline: no cmdline ruler for autocommand window
- 39e8c584d5 terminal: memory leak in pending TermRequest StringBuilder #39333
- fa69cac7e3 terminal: memory leak when pasting '=' register (#39738)
- 3a3405d964 test: only test for unibilium if a valid compilation string exists
- dcf9e8a98e treesitter: crash in ts_parser_delete after gc #39497
- 4f22640b86 treesitter: get_node_text() inconsistent trailing newline #39409
- 654c964d1a trust: hash unchanged empty buffers as empty files #39027
- 70f22713a1 ui2: entering the pager fails if `<ESC>` is remapped to `:fclose` (#39462)
- 13041a067e ui2: error E518 when typing "vim:" in cmdline #39599
- a0ee5811b1 unittest: preprocess failure when __typeof declarations present #40145
- b9d39f5bb2 vim.fs: fs.dir() may return nil "type" on some filesystems #39749
- be4e7cfd6a vim.hl: range(0,…) highlight not cleared after buffer-switch #40130
- 79fd0b6655 vim.range: empty ranges semantics vs regular ranges #39474
- 2ec758f403 vim.range: validate arguments on all cases #39415
- f83e0dcaf8 vim.secure: read() command injection vulnerability #39918

BUILD
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- a612ada984 version bump
- b1b489b316 docs: sort/lint class fields and keysets
- 4f6c711fc0 test: declaration specifier expected near '_Static_assert' #39788

VIM PATCHES
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- 964e797fdf 9.2.0395: tests: Test_backupskip() may read from $HOME (#39417)
- b013940391 9.2.0435: [security]: backticks in 'path' may cause shell execution on completion
- f9f2596288 9.2.0436: Buffer overflow when parsing overlong errorformat lines (#39578)
- 0aa77cb78c 9.2.0443: GUI: cancelling save dialog overwrites or discards unnamed buffer (#39617)
- 15a58bb02a 9.2.0444: Cannot set 'path' option via modeline
- 03af1ec931 9.2.0450: [security]: heap buffer overflow in spellfile.c read_compound() (#39660)
- 2902ec0541 9.2.0458: Crash with invalid shellredir/shellpipe value (#39691)
- 647b6be489 9.2.0461: Corrupted undofile causes use-after-free (#39707)
- c8e0af85e0 9.2.0500: filetype: some html files wrongly recognized as htmlangular (#39880)
- d9b8bac435 9.2.0508: completion: cannot complete user cmd :K with 'ignorecase' (#39944)
- 15a3318e13 9.2.0513: [security]: memory safety issues in spellfile.c (#39960)
- cc1982bd06 9.2.0517: quickfix: can set quickfixtextfunc in restricted/sandbox mode (#39970)
- dfd6cd477f bfebd12: runtime(javacc): Check for existence of javaFuncDef syn group before clearing it (#39731)
- a76bcbe3b8 partial:9.2.0315: missing bound-checks (#39334)

CMakeLists.txt

@@ -148,7 +148,7 @@ endif()
 set(NVIM_VERSION_MAJOR 0)
 set(NVIM_VERSION_MINOR 12)
 set(NVIM_VERSION_PATCH 3)
-set(NVIM_VERSION_PRERELEASE "-dev") # for package maintainers
+set(NVIM_VERSION_PRERELEASE "") # for package maintainers
 
 # API level
 set(NVIM_API_LEVEL 14)        # Bump this after any API/stdlib change.

runtime/nvim.appdata.xml

@@ -26,6 +26,7 @@
   </screenshots>
 
   <releases>
+    <release date="2026-06-11" version="0.12.3"/>
     <release date="2026-04-22" version="0.12.2"/>
     <release date="2026-04-06" version="0.12.1"/>
     <release date="2026-03-29" version="0.12.0"/>