Omnicompletion triggers linting

[ManuelvOK]

Information

VIM version

VIM - Vi IMproved 9.1 (2024 Jan 02, compiled Feb 06 2024 15:30:35)
Included patches: 1-80

Operating System: Arch Linux: Linux version 6.7.6-arch1-1

What went wrong

I am linting only when the buffer is saved.
I am also using ale#completion#OmniFunc for omnicompletion.
When using Omnicompletion by pressing <C-x><C-o>, linting is triggered and a syntax error is generated for the current line because I have not finished it.

Reproducing the bug

1. Configure ale as follows:

let g:ale_lint_on_text_changed = 0
let g:ale_lint_on_insert_leave = 0
let g:ale_lint_on_filetype_changed = 0
let g:ale_lint_on_enter = 0
set omnifunc=ale#completion#OmniFunc
set completeopt=menu,preview

2. Open python file foo.py and add content:

a = {}
a.

3. With the cursor at the end of line 2 in insert mode, trigger omnicompletion by pressing <C-x><C-o>.
4. A completion list appears. But after some seconds, the Line is marked with an error: # E: SyntaxError: invalid syntax (foo.py, line 2)

:ALEInfo

Expand

Current Filetype: python
Available Linters: ['bandit', 'cspell', 'flake8', 'flakehell', 'jedils', 'mypy', 'prospector', 'pycln', 'pycodestyle', 'pydocstyle', 'pyflakes', 'pylama', 'pylint', 'pylsp', 'pyre', 'pyright', 'refurb', 'ruff', 'unimport', 'vulture']
   Linter Aliases:
'jedils' -> ['jedi_language_server']
  Enabled Linters: ['jedils']
  Ignored Linters: []
 Suggested Fixers:
  'add_blank_lines_for_python_control_statements' - Add blank lines before control statements.
  'autoflake' - Fix flake issues with autoflake.
  'autoimport' - Fix import issues with autoimport.
  'autopep8' - Fix PEP8 issues with autopep8.
  'black' - Fix PEP8 issues with black.
  'isort' - Sort Python imports with isort.
  'pycln' - remove unused python import statements
  'pyflyby' - Tidy Python imports with pyflyby.
  'remove_trailing_lines' - Remove all blank lines at the end of a file.
  'reorder-python-imports' - Sort Python imports with reorder-python-imports.
  'ruff' - A python linter/fixer for Python written in Rust
  'ruff_format' - Fix python files with the ruff formatter.
  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
  'yapf' - Fix Python files with yapf.
 
 Linter Variables:
let g:ale_python_auto_pipenv = 0
let g:ale_python_auto_poetry = 0
let g:ale_python_auto_virtualenv = 0
let g:ale_python_jedils_auto_pipenv = 0
let g:ale_python_jedils_executable = 'jedi-language-server'
let g:ale_python_jedils_use_global = 0
 
 Global Variables:
let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = 0
let g:ale_command_wrapper = ''
let g:ale_completion_delay = 100
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = 50
let g:ale_disable_lsp = 'auto'
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_info_str = 'Info'
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_history_enabled = 1
let g:ale_info_default_mode = 'preview'
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 0
let g:ale_lint_on_filetype_changed = 0
let g:ale_lint_on_insert_leave = 0
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 0
let g:ale_linter_aliases = {}
let g:ale_linters = {'typescript': ['tsserver'], 'c': ['clang', 'clangtidy'], 'lua': ['luac'], 'sh': ['shellcheck'], 'javascript': ['jshint', 'jscs'], 'cpp': ['clang', 'clangtidy'], 'python': ['jedils']}
let g:ale_linters_explicit = 1
let g:ale_linters_ignore = {}
let g:ale_list_vertical = 0
let g:ale_list_window_size = 10
let g:ale_loclist_msg_format = '%code: %%s'
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = -1
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 0
let g:ale_pattern_options = v:null
let g:ale_pattern_options_enabled = v:null
let g:ale_root = {}
let g:ale_set_balloons = 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 = 'E'
let g:ale_sign_info = 'I'
let g:ale_sign_offset = 1000000
let g:ale_sign_style_error = 'E'
let g:ale_sign_style_warning = 'W'
let g:ale_sign_warning = 'W'
let g:ale_sign_highlight_linenrs = 0
let g:ale_type_map = {}
let g:ale_use_neovim_diagnostics_api = 0
let g:ale_use_global_executables = v:null
let g:ale_virtualtext_cursor = 'all'
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1
 
  Command History:

(executable check - success) jedi-language-server
(started) ['/usr/bin/zsh', '-c', '''jedi-language-server''']