[brew alias] Can't get aliases added to Bash completion

[yermulnik]

Output of brew config

HOMEBREW_VERSION: 4.3.18
ORIGIN: https://github.com/Homebrew/brew
HEAD: abc0584215659c5a8716d0798ea2801388d01368
Last commit: 3 days ago
Core tap JSON: 29 Aug 15:26 UTC
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
HOMEBREW_BAT: set
HOMEBREW_BAT_CONFIG_PATH: /home/yz/.config/bat/config
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: :0.0
HOMEBREW_EDITOR: vim
HOMEBREW_FORCE_BREWED_CURL: set
HOMEBREW_GITHUB_API_TOKEN: set
HOMEBREW_INSTALL_BADGE: ✔
HOMEBREW_MAKE_JOBS: 2
Homebrew Ruby: 3.3.4 => /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.4_1/bin/ruby
CPU: quad-core 64-bit haswell
Clang: 18.1.8
Git: 2.46.0 => /home/linuxbrew/.linuxbrew/bin/git
Curl: 8.9.1 => /home/linuxbrew/.linuxbrew/opt/curl/bin/curl
Kernel: Linux 4.15.0-213-generic x86_64 GNU/Linux
OS: Linux Mint 19.3 Tricia (tricia)
Host glibc: 2.27
/usr/bin/gcc: 7.5.0
/usr/bin/ruby: 2.5.1
glibc: 2.35_1
gcc@11: 11.5.0
gcc: 14.2.0
xorg: N/A

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  python-click

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  aggregate
  consul
  neofetch
  [email protected]
  sift
  youtube-dl

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected header files:
  /usr/local/include/python2.7/greenlet/greenlet.h
  /usr/local/include/python3.6m/Python-ast.h
  /usr/local/include/python3.6m/Python.h
  /usr/local/include/python3.6m/abstract.h
  /usr/local/include/python3.6m/accu.h
  /usr/local/include/python3.6m/asdl.h
  /usr/local/include/python3.6m/ast.h
  /usr/local/include/python3.6m/bitset.h
  /usr/local/include/python3.6m/bltinmodule.h
  /usr/local/include/python3.6m/boolobject.h
  /usr/local/include/python3.6m/bytearrayobject.h
  /usr/local/include/python3.6m/bytes_methods.h
  /usr/local/include/python3.6m/bytesobject.h
  /usr/local/include/python3.6m/cellobject.h
  /usr/local/include/python3.6m/ceval.h
  /usr/local/include/python3.6m/classobject.h
  /usr/local/include/python3.6m/code.h
  /usr/local/include/python3.6m/codecs.h
  /usr/local/include/python3.6m/compile.h
  /usr/local/include/python3.6m/complexobject.h
  /usr/local/include/python3.6m/datetime.h
  /usr/local/include/python3.6m/descrobject.h
  /usr/local/include/python3.6m/dictobject.h
  /usr/local/include/python3.6m/dtoa.h
  /usr/local/include/python3.6m/dynamic_annotations.h
  /usr/local/include/python3.6m/enumobject.h
  /usr/local/include/python3.6m/errcode.h
  /usr/local/include/python3.6m/eval.h
  /usr/local/include/python3.6m/fileobject.h
  /usr/local/include/python3.6m/fileutils.h
  /usr/local/include/python3.6m/floatobject.h
  /usr/local/include/python3.6m/frameobject.h
  /usr/local/include/python3.6m/funcobject.h
  /usr/local/include/python3.6m/genobject.h
  /usr/local/include/python3.6m/graminit.h
  /usr/local/include/python3.6m/grammar.h
  /usr/local/include/python3.6m/greenlet/greenlet.h
  /usr/local/include/python3.6m/import.h
  /usr/local/include/python3.6m/intrcheck.h
  /usr/local/include/python3.6m/iterobject.h
  /usr/local/include/python3.6m/listobject.h
  /usr/local/include/python3.6m/longintrepr.h
  /usr/local/include/python3.6m/longobject.h
  /usr/local/include/python3.6m/marshal.h
  /usr/local/include/python3.6m/memoryobject.h
  /usr/local/include/python3.6m/metagrammar.h
  /usr/local/include/python3.6m/methodobject.h
  /usr/local/include/python3.6m/modsupport.h
  /usr/local/include/python3.6m/moduleobject.h
  /usr/local/include/python3.6m/namespaceobject.h
  /usr/local/include/python3.6m/node.h
  /usr/local/include/python3.6m/object.h
  /usr/local/include/python3.6m/objimpl.h
  /usr/local/include/python3.6m/odictobject.h
  /usr/local/include/python3.6m/opcode.h
  /usr/local/include/python3.6m/osdefs.h
  /usr/local/include/python3.6m/osmodule.h
  /usr/local/include/python3.6m/parsetok.h
  /usr/local/include/python3.6m/patchlevel.h
  /usr/local/include/python3.6m/pgen.h
  /usr/local/include/python3.6m/pgenheaders.h
  /usr/local/include/python3.6m/py_curses.h
  /usr/local/include/python3.6m/pyarena.h
  /usr/local/include/python3.6m/pyatomic.h
  /usr/local/include/python3.6m/pycapsule.h
  /usr/local/include/python3.6m/pyconfig.h
  /usr/local/include/python3.6m/pyctype.h
  /usr/local/include/python3.6m/pydebug.h
  /usr/local/include/python3.6m/pydtrace.h
  /usr/local/include/python3.6m/pyerrors.h
  /usr/local/include/python3.6m/pyexpat.h
  /usr/local/include/python3.6m/pyfpe.h
  /usr/local/include/python3.6m/pygetopt.h
  /usr/local/include/python3.6m/pyhash.h
  /usr/local/include/python3.6m/pylifecycle.h
  /usr/local/include/python3.6m/pymacconfig.h
  /usr/local/include/python3.6m/pymacro.h
  /usr/local/include/python3.6m/pymath.h
  /usr/local/include/python3.6m/pymem.h
  /usr/local/include/python3.6m/pyport.h
  /usr/local/include/python3.6m/pystate.h
  /usr/local/include/python3.6m/pystrcmp.h
  /usr/local/include/python3.6m/pystrhex.h
  /usr/local/include/python3.6m/pystrtod.h
  /usr/local/include/python3.6m/pythonrun.h
  /usr/local/include/python3.6m/pythread.h
  /usr/local/include/python3.6m/pytime.h
  /usr/local/include/python3.6m/rangeobject.h
  /usr/local/include/python3.6m/setobject.h
  /usr/local/include/python3.6m/sliceobject.h
  /usr/local/include/python3.6m/structmember.h
  /usr/local/include/python3.6m/structseq.h
  /usr/local/include/python3.6m/symtable.h
  /usr/local/include/python3.6m/sysmodule.h
  /usr/local/include/python3.6m/token.h
  /usr/local/include/python3.6m/traceback.h
  /usr/local/include/python3.6m/tupleobject.h
  /usr/local/include/python3.6m/typeslots.h
  /usr/local/include/python3.6m/ucnhash.h
  /usr/local/include/python3.6m/unicodeobject.h
  /usr/local/include/python3.6m/warnings.h
  /usr/local/include/python3.6m/weakrefobject.h

Warning: Unbrewed '.pc' files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected '.pc' files:
  /usr/local/lib/pkgconfig/python-3.6.pc

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae and may need to be deleted.

Unexpected static libraries:
  /usr/local/lib/libpcrs.a
  /usr/local/lib/libpython3.6m.a
  /usr/local/lib/libtcp-portmon.a

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  tftui
  tenv
  elfutils
Error: /home/linuxbrew/.linuxbrew/Cellar/ruff/0.6.3 is not a directory

Description of issue

I'm truing to debug why Bash completion for Brew aliases work on one of my systems, while it doesn't on another.
"Affected" system:

> brew --version
Homebrew 4.3.18

> bash --version | head -1
GNU bash, версия 5.1.8(1)-release (x86_64-pc-linux-gnu)

> brew tap | fgrep alias
homebrew/aliases

> brew tap-info homebrew/aliases
homebrew/aliases: Installed
3 commands
/home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/homebrew/homebrew-aliases (243 files, 908.8KB)
From: https://github.com/Homebrew/homebrew-aliases

> tree -L 1 ~/.brew-aliases/
/home/yz/.brew-aliases/
├── list_installed_files
├── list_installed_packages_by_date
├── list_installed_packages_by_name
├── list_installed_packages_versions
├── RCS
├── show
└── which

1 directory, 6 files

> ls -l /home/linuxbrew/.linuxbrew/etc/bash_completion.d/brew
lrwxrwxrwx 1 yz yz 36 Nov 15  2020 /home/linuxbrew/.linuxbrew/etc/bash_completion.d/brew -> ../../Homebrew/completions/bash/brew

> ls -l /home/linuxbrew/.linuxbrew/bin/brew-*
lrwxrwxrwx 1 yz yz 43 Aug 29 17:52 /home/linuxbrew/.linuxbrew/bin/brew-list_installed_files -> /home/yz/.brew-aliases/list_installed_files
lrwxrwxrwx 1 yz yz 43 Aug 29 17:27 /home/linuxbrew/.linuxbrew/bin/brew-list-installed-files -> /home/yz/.brew-aliases/list_installed_files
lrwxrwxrwx 1 yz yz 54 Aug 29 17:52 /home/linuxbrew/.linuxbrew/bin/brew-list_installed_packages_by_date -> /home/yz/.brew-aliases/list_installed_packages_by_date
lrwxrwxrwx 1 yz yz 54 Aug 29 17:28 /home/linuxbrew/.linuxbrew/bin/brew-list-installed-packages-by-date -> /home/yz/.brew-aliases/list_installed_packages_by_date
lrwxrwxrwx 1 yz yz 54 Aug 29 17:52 /home/linuxbrew/.linuxbrew/bin/brew-list_installed_packages_by_name -> /home/yz/.brew-aliases/list_installed_packages_by_name
lrwxrwxrwx 1 yz yz 54 Aug 29 17:28 /home/linuxbrew/.linuxbrew/bin/brew-list-installed-packages-by-name -> /home/yz/.brew-aliases/list_installed_packages_by_name
lrwxrwxrwx 1 yz yz 55 Aug 29 17:52 /home/linuxbrew/.linuxbrew/bin/brew-list_installed_packages_versions -> /home/yz/.brew-aliases/list_installed_packages_versions
lrwxrwxrwx 1 yz yz 55 Aug 29 17:28 /home/linuxbrew/.linuxbrew/bin/brew-list-installed-packages-versions -> /home/yz/.brew-aliases/list_installed_packages_versions
lrwxrwxrwx 1 yz yz 27 Aug 29 17:23 /home/linuxbrew/.linuxbrew/bin/brew-show -> /home/yz/.brew-aliases/show
lrwxrwxrwx 1 yz yz 28 Aug 19  2022 /home/linuxbrew/.linuxbrew/bin/brew-which -> /home/yz/.brew-aliases/which

> . /home/linuxbrew/.linuxbrew/etc/bash_completion.d/brew

> brew li<tab><tab>
link       linkage    list       livecheck

Is there anything I can take a look into to understand why the same setup on another system works w/o issues and lists Brew aliases? Maybe some specific place inside /home/linuxbrew/.linuxbrew/etc/bash_completion.d/brew file that I couldn't identify during my own investigation? 🤔
Thanks.