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Bug#1132524: shellcheck: avoid-nullary-conditions ignores test command

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Package: shellcheck
Version: 0.11.0-2
Severity: normal

Dear Maintainer,

shellcheck has the optional check 'avoid-nullary-conditions' which warns
of use of the [ command to check for nonempty strings without explicitly
specifying the -n option.  However, it fails to warn of the same use
with the equivalent test command.

Consider the following sequence of commands.

	$ echo '#!/bin/sh' > test.sh
	$ echo 'test "$HOME"' >> test.sh
	$ shellcheck --enable avoid-nullary-conditions test.sh

The file 'test.sh' is created with a test command on line 2 that I would
expect should trigger the avoid-nullary-conditions check.  But the final
shellcheck command does not output the corresponding warning.

Take care,
	Seth McDonald.

-- System Information:
Debian Release: 13.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable'), (50, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.74+deb13+1-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages shellcheck depends on:
ii  libc6     2.41-12+deb13u2
ii  libffi8   3.4.8-2
ii  libgmp10  2:6.3.0+dfsg-3
ii  libnuma1  2.0.19-1

shellcheck recommends no packages.

shellcheck suggests no packages.

-- no debconf information

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Bug#1132524: shellcheck: avoid-nullary-conditions ignores test command Seth McDonald <dev@sethm.id.au> - 2026-04-02 10:50 +0200

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