KTLint formatting adding debug text to file

[MorrisonWill]

Information

NVIM v0.6.1
Build type: Release

Arch Linux x86_64

What went wrong

After setting up ktlint using kotlin = { "ktlint" }, in my neovim config and saving a file, the file formats correctly but the ktlint debug information is added on both sides of the file. Here is an example from Gradle's default hello world after removing a tab and then saving with the format on save option enabled:

`00:46:02.120 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "baseline" id.
00:46:02.122 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "checkstyle" id.
00:46:02.123 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "json" id.
00:46:02.123 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "html" id.
00:46:02.123 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "plain" id.
00:46:02.123 [main] DEBUG com.pinterest.ktlint.Main - Discovered reporter with "sarif" id.
00:46:02.123 [main] DEBUG com.pinterest.ktlint.Main - Initializing "plain" reporter with {verbose=false, color=false, color_name=DARK_GRAY}
/*

• This Kotlin source file was generated by the Gradle 'init' task.
  */
  package hello_world

class App {

val greeting: String
    get() {
        return "Hello World!"
    }

}

fun main() {
println(App().greeting)
}
00:46:03.083 [main] DEBUG com.pinterest.ktlint.Main - 1248ms / 1 file(s) / 0 error(s)`

Reproducing the bug

1. Install neovim
2. Set up ale with ktlint enabled for kotlin formatting and format on save
3. Generate Gradle hello world project
4. Save App.kt

:ALEInfo

let g:ale_loclist_msg_format = v:null let g:ale_max_buffer_history_size = v:null let g:ale_max_signs = v:null let g:ale_maximum_file_size = v:null let g:ale_open_list = v:null 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 = v:null let g:ale_sign_error = v:null let g:ale_sign_info = v:null let g:ale_sign_offset = v:null let g:ale_sign_style_error = v:null let g:ale_sign_style_warning = v:null let g:ale_sign_warning = v:null let g:ale_sign_highlight_linenrs = v:null let g:ale_statusline_format = v:null let g:ale_type_map = v:null let g:ale_use_global_executables = v:null let g:ale_virtualtext_cursor = 0 let g:ale_warn_about_trailing_blank_lines = 1 let g:ale_warn_about_trailing_whitespace = 1

[hsanson]

I use ktlint with ALE for work and I have never seen this behavior. I just tested on my machine and the fixer works as expected. Can you verify if you have some ktlint configuration that causes it to output debug information?

I am using latest ALE from master, neovim 0.7.0-dev, and ktlint 0.42.1.

[MorrisonWill]

I don't have any ktlint configuration and other ALE fixers are working properly. I tried a few different ktlint versions as well and updated ALE. Same result each time.

[hsanson]

Seems there was a bug that caused ktlint to output debug info even if --debug flag was not used: pinterest/ktlint#1412

If you still see this behavior and are sure the --debug flag is not being passed to ktlint then is a regression on Ktlint side. I recommend to report this problem at Ktlint repository.

[hsanson]

Does not seem to be ALE issue. Ktlint works fine on my own projects.