bug(kill): when using -l with $'\xFF' no errors reported

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
72/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
rust
Domain
cli

Research direction

Start with the kill command entry point and reproduce ./kill -l $'\xFFa\xFF', then compare its output with GNU kill using the command shown. Done means an invalid signal specification reports an error instead of silently printing the full signal list.

Written by the indexing model from the issue text.

Description

U - kill

Hi, uutils mainteners

i want let you known, that is another error silence issue, i used

relunsec@relunsec:~/software/coreutils/target/debug$ ./kill -l $'\xFFa\xFF'
EXIT
HUP
INT
QUIT
ILL
TRAP
ABRT
BUS
FPE
KILL
USR1
SEGV
USR2
PIPE
ALRM
TERM
STKFLT
CHLD
CONT
STOP
TSTP
TTIN
TTOU
URG
XCPU
XFSZ
VTALRM
PROF
WINCH
POLL
PWR
SYS
RTMIN
RTMAX
relunsec@relunsec:~/software/coreutils/target/debug$

as i can see just gets back signals full list, no errors while gnu kill errors out correctly

relunsec@relunsec:~/software/coreutils/target/debug$ kill -l $'\xFFa\xFF'
bash: kill: �a�: invalid signal specification
relunsec@relunsec:~/software/coreutils/target/debug$
Dominant language
Rust
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Merged PRs (30d)
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