I believe this is the same issue reported in #3073 and apparently fixed in #3075.

Am I doing something wrong?

What steps will reproduce the bug?

Running $ bat --no-config --list-themes | cat

The --no-config part is optional, it's just to clear my settings for this run.

What happens?

This is the output:

1337
Coldark-Cold
Coldark-Dark
DarkNeon
Dracula
GitHub
Monokai Extended (default dark)
Monokai Extended Bright
Monokai Extended Light (default light)
Monokai Extended Origin
Nord
OneHalfDark
OneHalfLight
Solarized (dark)
Solarized (light)
Sublime Snazzy
TwoDark
Visual Studio Dark+
ansi
base16
base16-256
custom16
gruvbox-dark
gruvbox-light
zenburn

Monokai Extended and Extended Light include default theme annotations.

What did you expect to happen instead?

The same list / output but without (default dark) and (default light) information.

How did you install bat?

Via Cargo.

Side note

Probably unrelated but when I run $ bat --list-themes --color=never I get the same output but with (default) instead of (default dark).

bat version and environment

Software version

bat 0.25.0

Operating system

• OS: Linux (Ubuntu 23.10)
• Kernel: 6.5.0-44-generic

Command-line

bat --diagnostic 

Environment variables

BAT_CACHE_PATH=<not set>
BAT_CONFIG_PATH=<not set>
BAT_OPTS=<not set>
BAT_PAGER='less -R'
BAT_PAGING=<not set>
BAT_STYLE=<not set>
BAT_TABS=<not set>
BAT_THEME=<not set>
COLORTERM=truecolor
LANG=en_US.UTF-8
LC_ALL=<not set>
LESS=<not set>
MANPAGER='sh -c '\''col -bx | bat -p --language=man --theme=custom16'\'''
NO_COLOR=<not set>
PAGER=less
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_CACHE_HOME=<not set>
XDG_CONFIG_HOME=<not set>

System Config file

Could not read contents of '/etc/bat/config': No such file or directory (os error 2).

Config file

# This is `bat`s configuration file. Each line either contains a comment or
# a command-line option that you want to pass to `bat` by default. You can
# run `bat --help` to get a list of all possible configuration options.

--theme="Dracula"
--italic-text=always
--color=always

Custom assets metadata

bat_version: 0.25.0
creation_time:
  secs_since_epoch: 1736608946
  nanos_since_epoch: 486389724

Custom assets

• metadata.yaml, 97 bytes
• syntaxes.bin, 973899 bytes
• themes.bin, 41464 bytes

Compile time information

• Profile: release
• Target triple: x86_64-unknown-linux-gnu
• Family: unix
• OS: linux
• Architecture: x86_64
• Pointer width: 64
• Endian: little
• CPU features: fxsr,sse,sse2
• Host: x86_64-unknown-linux-gnu

Less version

> less --version 
less 590 (GNU regular expressions)
Copyright (C) 1984-2021  Mark Nudelman

less comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the file named README in the less distribution.
Home page: https://greenwoodsoftware.com/less