Vista fails on c++ file

[kchibisov]

vista fails with:

Error detected while processing function <SNR>131_on_exit[6]..<SNR>131_ApplyExtracted[14]..vista#viewer#Display[1]..<SNR>137_Render[2]..vista#ren
derer#default#Render[5]..<SNR>139_Render[25]..<SNR>139_RenderDescendants[44]..<SNR>139_RenderDescendants[41]..<SNR>139_DescendantsOf:
line    1:
E874: (NFA) Could not pop the stack!

OS: Arch Linux.
Output of ctags --version

Universal Ctags 0.0.0(45968eff), Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Oct 15 2018, 21:55:11
  URL: https://ctags.io/
  Optional compiled features: +wildcards, +regex, +iconv, +option-directory, +xpath, +json, +interactive, +sandbox, +yaml

neovim version

NVIM v0.3.5
Build type: Release
LuaJIT 2.0.5

vista version: 0e3e3a60f5d657f24a787472e4dbc7a7a706b4d6

File for reproduction ( convert to .h )
SmallVector.txt

Vista info

    Current FileType: cpp
Avaliable Executives: ['ctags', 'lcn']
    Global Variables:
    let g:vista#executive#ctags#support_json_format = 1
    let g:vista#executives = ['coc', 'ctags', 'lcn', 'vim_lsp']
    let g:vista#render#ctags = 'default'
    let g:vista#renderer#ctags = 'default'
    let g:vista#renderer#default#vlnum_offset = 3
    let g:vista#renderer#enable_icon = 1
    let g:vista#renderer#icons = {'subroutine': '洛', 'method': '', 'func': '', 'variables': '', 'namespace': '', 'field': '綠', 'interface':
 '禍', 'type': '', 'packages': '', 'property': '襁', 'implementation': '', 'default': '', 'augroup': 'פּ', 'macro': '', 'enumerator': '', 'c
onst': '', 'macros': '', 'map': 'פּ', 'fields': '綠', 'functions': '', 'enum': '', 'function': '', 'target': '', 'typedef': '', 'variable':
 '', 'modules': '', 'constant': '', 'struct': 'פּ', 'types': '', 'module': '', 'typeParameter': '', 'package': '', 'class': '', 'member':
'', 'var': '', 'union': '鬒'}
    let g:vista_cursor_delay = 0
    let g:vista_sidebar_width = 35
    let g:vista_stay_on_open = 0

Steps to reproduce given the above info

nvim SmallVector.h
:Vista

Expected behavior
Show tags

Actual behavior
Error

[liuchengxu]

I can't reproduce with this minimal vimrc:

call plug#begin('~/.vim/plugged')
Plug 'liuchengxu/vista.vim'
call plug#end()

let g:vista#executive#ctags#support_json_format = 1
let g:vista#executives = ['coc', 'ctags', 'lcn', 'vim_lsp']
let g:vista#render#ctags = 'default'
let g:vista#renderer#ctags = 'default'
let g:vista#renderer#default#vlnum_offset = 3
let g:vista#renderer#enable_icon = 1
let g:vista#renderer#icons = {'subroutine': '洛', 'method': '', 'func': '', 'variables': '', 'namespace': '', 'field': '綠', 'interface': '禍', 'type': '', 'packages': '', 'property': '襁', 'implementation': '', 'default': '', 'augroup': 'פּ', 'macro': '', 'enumerator': '', 'const': '', 'macros': '', 'map': 'פּ', 'fields': '綠', 'functions': '', 'enum': '', 'function': '', 'target': '', 'typedef': '', 'variable': '', 'modules': '', 'constant': '', 'struct': 'פּ', 'types': '', 'module': '', 'typeParameter': '', 'package': '', 'class': '', 'member': '', 'var': '', 'union': '鬒'}
let g:vista_cursor_delay = 0
let g:vista_sidebar_width = 35
let g:vista_stay_on_open = 0

You have to see whether some other plugins result in your issue.

[kchibisov]

For me it doesn't work with your init.vim file either. Maybe some ctags related problem?

[liuchengxu]

I'm not sure if it's a problem of neovim. Try updating your neovim? Here is my neovim version:

:version
NVIM v0.4.0-dev
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/local/Homebrew/Library/Homebrew/shims/mac/super/clang -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Ws
trict-prototypes -std=gnu99 -Wshadow -Wconversion -Wmissing-prototypes -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=auto -DINCLUDE_GENERATED_DECLARATIONS -D_
GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -I/tmp/neovim-20190510-20306-l8yquw/build/config -I/tmp/neovim-20190510-20306-l8yquw/src -I/usr/local/include -I/usr/local
/opt/gettext/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/tmp/neovim-20190510-20306-l8yquw/build/src/nvim/auto -I/tmp/neovim-20190510-20306-l8yquw/bu
ild/include
Compiled by [email protected]

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/Cellar/neovim/HEAD-a541c68/share/nvim"

[kchibisov]

Same error with ( neovim was built from git )

NVIM v0.4.0-758-g9e0982a1a
Build type: RelWithDebInfo
LuaJIT 2.0.5
Compilation: /usr/bin/cc -march=x86-64 -mtune=native -O2 -pipe -fno-plt -O2 -g -DMIN_LOG_LEVEL=3 -Og -g -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wshadow -Wconversion -Wmissing-prototypes -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-
color=auto -Wno-array-bounds -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -I/home/kchibisov/Applications/neovim-git/src/neovim-git/build/config -I/home/kchibisov/Applications/neovim-git/src/neovim-git/src -I/usr/include -I/home/kchibisov
/Applications/neovim-git/src/neovim-git/build/src/nvim/auto -I/home/kchibisov/Applications/neovim-git/src/neovim-git/build/include
Compiled by kchibisov@NightLord

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/share/nvim"

[liuchengxu]

Does this error only occur in the cpp/.h file or apply everywhere? Does it happen in vim?

[kchibisov]

Only some cpp files. Everything is fine on this file with Vista lcn. What's your ctags --version?

[liuchengxu]

Universal Ctags 0.0.0(46490ea3), Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Apr 17 2019, 09:48:50
  URL: https://ctags.io/
  Optional compiled features: +wildcards, +regex, +iconv, +option-directory, +xpath, +json, +interactive, +case-insensitive-filenames, +packcc

That's really weird. I'm not familiar with E874. I can't help if I am not able to reproduce it.

[kchibisov]

I've figured output pattern to brake this. It fails on c++ destructors. So this example can be used instead.

class Foo {
  ~Foo() {
  }
};

How vista invokes ctags (which cli arguments)? So we can compare our output.
Edit: Updating ctags to latest master doesn't resolve the issue. Now it's really something strange.

[kchibisov]

set re=1 resolves the issue.

[liuchengxu]

Glad to see it's resolved.

[hiberabyss]

Having the same problem.

In some cpp files, missing function items in vista window, while there are corresponding functions in the tag file after execute ctags command:

ctags --format=2 --excmd=pattern --fields=nksSaf --extras= --file-scope=yes --sort=no --append=no --language-force=c++ --c++-kinds=psvcdefghtmnu --output-format=json --fields=-PF -f- /var/folders/cj/lm7l170n62s19lnxb7h544h40000gn/T/2dc39a6ecb8b4a8d19b3bde54953b9df95f717cdac10d9a4c9b6cca6661ed0ad.cc