odd output with vim 9 and ALE...

hey there 👋

i'm not sure where to post this so apologies in advance if this is the wrong place. i'm seeing rather odd behavior using macvim (MacVim r178 (Vim 9.0.1897)) on macos ventura (13.5.2 (22G91)). here's an example:

it seems to be somehow related to using splits - things appear fine until you open a split at which point certain panels end up in this funky state where the gutter displays repeated @ symbols, the source code is hidden, and line numbers are not available. i think it only impacts code / panels where there are errors / warnings. in the screenshot above, you can see there are "unused" warnings on a few lines. it's easily reproducible.

i've narrowed it down to rust-analyzer - if i disable the linter using ALE's let g:ale_linters = {'rust': []}, the issue no longer happens. if i reenable the linter with let g:ale_linters = {'rust': ['analyzer']} as described here, the issue comes back. my ALE settings are otherwise, fairly stock:

let g:ale_fix_on_save = 0
let g:ale_linters = {'rust': ['analyzer']}
let g:ale_linters_ignore = { 'javascript': ['deno'] }
let g:ale_fixers = { '*': ['trim_whitespace', 'remove_trailing_lines'] }

fwiw, here's the output of `ALEInfo` (click to expand)

 Current Filetype: rust
Available Linters: ['analyzer', 'cargo', 'cspell', 'rls', 'rustc']
   Linter Aliases:
'analyzer' -> ['rust_analyzer']
  Enabled Linters: ['analyzer']
  Ignored Linters: []
 Suggested Fixers:
  'remove_trailing_lines' - Remove all blank lines at the end of a file.
  'rustfmt' - Fix Rust files with Rustfmt.
  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
 
 Linter Variables:
" Press Space to read :help for a setting
let g:ale_rust_analyzer_config = {}
let g:ale_rust_analyzer_executable = 'rust-analyzer'
 
 Global Variables:
" Press Space to read :help for a setting
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 = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
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 = {'*': ['trim_whitespace', 'remove_trailing_lines']}
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 = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_insert_leave = 1
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 'normal'
let g:ale_linter_aliases = {}
let g:ale_linters = {'rust': ['analyzer']}
let g:ale_linters_explicit = 0
let g:ale_linters_ignore = {'javascript': ['deno']}
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 = 1
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) rust-analyzer
(started) ['/bin/zsh', '-ic', '''rust-analyzer''']

happy to troubleshoot further if it's helpful. any pointers you could send my way would be much appreciated 🙏

rust-analyzer version: rust-analyzer 0.0.0 (0840038f0 2023-09-30) (via: rust-analyzer --version)

rustc version: rustc 1.72.1 (d5c2e9c34 2023-09-13) (via: rustc -V)

relevant settings: CARGO, RUSTC, RUSTUP_HOME or CARGO_HOME are not set, ALE settings are included above. edit: i'm running ALE via vim-plug at https://github.com/dense-analysis/ale/commit/53b01d6a546384a28f1ccbed41baae58d7341da4

fwiw, i installed both rust-analyzer and rustup-init via homebrew

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