Spacemacs hangs with "making tags completation table" message

[emad-elsaid]

Description

I have the same problem as #4747, installed spacemacs working fine for couple hours, half an hour then and it was suffering from the same referenced issue.

I'm working on rails project, not a small one (several thousand files), while editing a controller it hang and try to generate TAGS, I have Autocomplete layer enabled.
this is my .spacemacs file
https://gist.github.com/blazeeboy/5de9e9bf0847f4054b560fe96f50ae54

sometimes it gets back to work when i press C-g for long time, and sometimes it doesn't, also when I was working on spec files it didn't happen, the time I started working on controllers it stopped working.

Reproduction guide

• Start Emacs
• Open a ruby on rails project
• Open a controller
• enter insert mode i
• start typing
• it hangs with message "...generating TAGS"

Observed behaviour:

• pressing Ctrl+g solves the problem in most cases

Expected behaviour:
to type normally without hanging, that's obvious 😃

System Info

• OS: darwin
• Emacs: 24.5.1
• Spacemacs: 0.105.19
• Spacemacs branch: master (rev. 5f26b82)
• Graphic display: t
• Distribution: spacemacs
• Editing style: hybrid
• Completion: helm
• Layers:

((auto-completion :variables auto-completion-enable-snippets-in-popup t)
 better-defaults emacs-lisp git markdown javascript osx html shell-scripts sql yaml github eyebrowse
 (shell :variables shell-default-height 30 shell-default-position 'bottom)
 (ruby :variables ruby-version-manager 'rvm)
 ruby-on-rails
 (syntax-checking :variables syntax-checking-enable-tooltips nil))

EDIT: [@StreakyCobra] Correct referenced PR number (reason: Wrong one was linked)

[jefflasslett]

This is real. I've just disabled auto-completion to prevent it.

Description

Whilst editing code emacs pauses. I think it is in the process of doing auto-completion of the identifier being edited.

Reproduction guide

• Start Emacs
• Open a file. I am working on a rails project and so am editing ruby code.
• Change a function name. Your goal is to get auto-completion to offer up choices.

Observed behaviour:

• Cursor freezes and status message is "Making tags completion table for ..."
• Ctrl-g 3 times kills the process and editing can resume. But it will freeze up again "making tags completion table ..." as soon as you type a bit more.

Expected behaviour:
No freezing. Auto completion choices offered.

System Info 💻

• OS: gnu/linux
• Emacs: 24.5.1
• Spacemacs: 0.200.2
• Spacemacs branch: master (rev. 7bdde17)
• Graphic display: t
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

(emacs-lisp git markdown org dash yaml
            (shell :variables shell-default-height 30 shell-default-position 'bottom)
            spell-checking syntax-checking version-control ruby-on-rails)

I've attached my .spacemacs (as spacemacs.txt) and my custom theme. I install the theme locally as I haven't uploaded it to a package archive. theme_package.zip just contains the tar file for the theme.

spacemacs.txt

theme_package.zip

[github-actions]

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