Ale: neovim randomly crahes (but not vim)

[cvlmtg]

Information

VIM version

NVIM v0.2.3-dev
Build type: Release

Operating System: macOS 10.13.2

:ALEInfo

Current Filetype: javascript
Available Linters: ['eslint', 'flow', 'jscs', 'jshint', 'standard', 'xo']
Enabled Linters: ['eslint']
Linter Variables:
let g:ale_javascript_eslint_executable = 'eslint'
let g:ale_javascript_eslint_options = ''
let g:ale_javascript_eslint_suppress_eslintignore = 0
let g:ale_javascript_eslint_suppress_missing_config = 0
let g:ale_javascript_eslint_use_global = 0
Global Variables:
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = '%code: %%s'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 0
let g:ale_fixers = {}
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 'always'
let g:ale_linter_aliases = {}
let g:ale_linters = {'javascript': ['eslint']}
let g:ale_open_list = 0
let g:ale_set_highlights = 1
let g:ale_set_loclist = 1
let g:ale_set_quickfix = 0
let g:ale_set_signs = 1
let g:ale_sign_column_always = 0
let g:ale_sign_error = '✖'
let g:ale_sign_offset = 1000000
let g:ale_sign_warning = '⚠'
let g:ale_statusline_format = ['✖ %d', '⚠ %d', '']
let g:ale_warn_about_trailing_whitespace = 1
Command History:
(started) ['/bin/sh', '-c', '''/Users/matteo/dev/html5-buttons/node_modules/eslint/bin/eslint.js'' -f unix --stdin --stdin-filename ''/Users/matteo/dev/html5-buttons/test/lib/excel/server.js'' < ''/var/fo
lders/tn/xlfmczmn783f148sy0j_t8yw0000gn/T/nvimY62wjF/10/server.js''']
(finished - exit code 1) ['/bin/sh', '-c', '''/Users/matteo/dev/html5-buttons/node_modules/eslint/bin/eslint.js'' -f unix --stdin --stdin-filename ''/Users/matteo/dev/html5-buttons/test/lib/excel/server.j
s'' < ''/var/folders/tn/xlfmczmn783f148sy0j_t8yw0000gn/T/nvimY62wjF/11/server.js''']
<<

>>
/Users/matteo/dev/html5-buttons/test/lib/excel/server.js:8:7: 'data1' is assigned a value but never used. [Error/no-unused-vars]
/Users/matteo/dev/html5-buttons/test/lib/excel/server.js:102:31: 'excel2buttons' is not defined. [Error/no-undef]
/Users/matteo/dev/html5-buttons/test/lib/excel/server.js:103:31: 'excel2buttons' is not defined. [Error/no-undef]
/Users/matteo/dev/html5-buttons/test/lib/excel/server.js:122:31: 'excel2buttons' is not defined. [Error/no-undef]
/Users/matteo/dev/html5-buttons/test/lib/excel/server.js:123:31: 'excel2buttons' is not defined. [Error/no-undef]
5 problems
<<

>>

What went wrong

nvim randomly crashes

Reproducing the bug

No idea how to reproduce it. it can work flawlessy for days and then crash without notice. I've already opened an issue on the nvim repo (https://github.com/neovim/neovim/issues/7768), but maybe in the meanwhile it can be fixed in ALE too (losing all the work done since the last save is always annoying :p )

[w0rp]

This looks like a NeoVim bug to me. I handled an empty list in that function there, so you won't see any errors in ALE any more.

[cvlmtg]

@w0rp yep, I know it's a neovim bug, I opened a issue there too, but I suppose it might need a while before it gets fixed, so having ALE handling the empty list at least will avoid triggering the crash :) thanks!