Installation script does not handle unknown parameters well

[sttcns]

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• your problem was from running the official install or uninstall script?
• after installation: ran brew config and brew doctor and included their output with your issue? If you couldn't install: provided your OS version with the output of your issue?

What you were trying to do (and why)

Download the installation script and run it with an unknown parameter.

curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh -o install.sh
./install.sh ASDF

What happened (include command output)

The script fails, because warn function is used on line 58 before its declaration on line 97.

Command output

./install.sh: line 58: warn: command not found
Homebrew Installer
Usage: [NONINTERACTIVE=1] [CI=1] install.sh [options]
    -h, --help       Display this message.
    NONINTERACTIVE   Install without prompting for user input
    CI               Install in CI mode (e.g. do not prompt for user input)

  

What you expected to happen

The error handled gracefully.

Step-by-step reproduction instructions (by running brew commands)

curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh -o install.sh
./install.sh ASDF

$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

[ZhongRuoyu]

Thanks for reporting; this should be fixed by #920.