• This is a bug report
• I searched existing issues before opening this one

Expected behavior

I would expect a docker line of:

RUN dnf install -y dnf-plugins-core \
    && dnf clean all

To return an error of:

-:5 DL3041 warning: Specify version with `dnf install -y <package>-<version>`.

Actual behavior

Hadolint runs successfully with no errors.

Steps to reproduce the behavior

Use this dockerfile:

FROM rockylinux:9.3
RUN dnf install -y dnf-plugins-core \
    && dnf clean all

And run hadolint against it.

This oneliner works:

printf "%s\n" "FROM rockylinux:9.3" "RUN dnf install -y dnf-plugins-core && dnf clean all" | docker run --rm -i hadolint/hadolint

If you add, e.g., openssl to the install command then it works as expected:

$ printf "%s\n" "FROM rockylinux:9.3" "RUN dnf install -y openssl dnf-plugins-core && dnf clean all" | docker run --rm -i hadolint/hadolint
-:2 DL3041 warning: Specify version with `dnf install -y <package>-<version>`.

Output of hadolint --version or
docker run --rm hadolint/hadolint hadolint --version or
docker run --rm ghcr.io/hadolint/hadolint hadolint --version:

Haskell Dockerfile Linter 2.12.1

Dockerfile (if relevant)

FROM rockylinux:9.3
RUN dnf install -y dnf-plugins-core \
    && dnf clean all

Additional environment details (OS, stack version, etc.)