msgcat --color=test no longer works

[Daniel Tang]

`msgcat --color=test` no longer prints anything. I rely on that package to determine what colors a terminal supports, as does anyone using https://askubuntu.com/a/1044802/1004020 .

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu

$ lsb_release -rd
Description: Ubuntu Hirsute Hippo (development branch)
Release: 21.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center

$ apt-cache policy gettext
gettext:
  Installed: 0.21-3ubuntu2
  Candidate: 0.21-3ubuntu2
  Version table:
 *** 0.21-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen

It should work and the output should be the same as in 20.10:

$ msgcat --color=test
Colors (foreground/background):
       |black |blue |green |cyan |red |magenta|yellow |white |default
black | Words | Words | Words | Words | Words | Words | Words | Words | Words
blue | Words | Words | Words | Words | Words | Words | Words | Words | Words
green | Words | Words | Words | Words | Words | Words | Words | Words | Words
cyan | Words | Words | Words | Words | Words | Words | Words | Words | Words
red | Words | Words | Words | Words | Words | Words | Words | Words | Words
magenta| Words | Words | Words | Words | Words | Words | Words | Words | Words
yellow | Words | Words | Words | Words | Words | Words | Words | Words | Words
white | Words | Words | Words | Words | Words | Words | Words | Words | Words
default| Words | Words | Words | Words | Words | Words | Words | Words | Words

Colors (hue/saturation):
red:

yellow:

green:

cyan:

blue:

magenta:

red:

Weights:
normal, bold, default

Postures:
normal, italic, default

Text decorations:
normal, underlined, default

Colors (foreground) mixed with attributes:
black |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
blue |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
green |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
cyan |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
red |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
magenta|normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
yellow |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
white |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
default|normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|

Colors (background) mixed with attributes:
black |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
blue |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
green |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
cyan |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
red |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
magenta|normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
yellow |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
white |normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|
default|normal|bold|normal|italic|normal|underlined|normal|
       |normal|bold+italic|normal|bold+underl|normal|italic+underl|normal|

$
(The color was present before copying and pasting here)

4) What happened instead

There is no output:

$ msgcat --color=test
$