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

Expected behavior

Should accept heredocs when combined with line continuation (backslash at EOL.)

Actual behavior

/tmp/Dockerfile:6:1 unexpected 'b' expecting '#', '\', ADD, ARG, CMD, COPY, ENTRYPOINT, ENV, EXPOSE, FROM, HEALTHCHECK, LABEL, MAINTAINER, ONBUILD, RUN, SHELL, STOPSIGNAL, USER, VOLUME, WORKDIR, a pragma, at least one space, or end of input

Steps to reproduce the behavior

hadolint /tmp/Dockerfile

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 2.12.0

Dockerfile (if relevant)

# syntax=docker/dockerfile:1.7-labs
FROM scratch

RUN foo && \
    bar <<BAR
blah
BAR

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