Package: coreutils
Version: 8.32-4+b1
Severity: normal

Dear Maintainer,

Quoth POSIX Issue 7, XCU, stty, STDOUT, last paragraph:
-- >8 --
If control characters are written as part of the default output,
or if the -a option is specified,
control characters shall be written as:

"%s = %s;", <control-character name>, <value>

where <value> is either the character,
or some visual representation of the character if it is non-printable,
or the string undef if the character is disabled.
-- >8 --
(crucially, i.a., "undef" is italicised, and "the string I[undef]"
 matches the rest of the page,
 cf. OPERANDS, Special Control Character Assignments).

This unequivocally means
"if stty kill undef, then stty -a must have »kill = undef;«" (&c.),
but:
-- >8 --
$ stty -a | grep =
speed 38400 baud; rows 54; columns 172; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z;
rprnt = ^R; werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
-- >8 --

What's worse, stty eol '<undef>' doesn't recognise <undef> as an alias
for undef.

Best,
наб

-- System Information:
Debian Release: 11.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 
'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-17-amd64 (SMP w/24 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_FIRMWARE_WORKAROUND, 
TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages coreutils depends on:
ii  libacl1      2.2.53-10
ii  libattr1     1:2.4.48-6
ii  libc6        2.31-13+deb11u3
ii  libgmp10     2:6.2.1+dfsg-1+deb11u1
ii  libselinux1  3.1-3

coreutils recommends no packages.

coreutils suggests no packages.

-- no debconf information

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