Weird error: "expecting is not a supported rule"

[darkvertex]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Ensure autosave is ON, make a new Dockerfile.
2. Start typing this:

   FROM node:latest
   WORKDIR 

   (Note: WORKDIR has a space after it.)

3. A notification should appear: hadolint: expecting is not a supported rule

Expected behaviour Okay, so an empty "WORKDIR" is nonsense, but I would not expect the hadolint extension to be worrying about it, let alone throwing a cryptic notification.

Screenshots or Dockerfile

FROM node:latest
WORKDIR 

(Note: WORKDIR has a space after it.) ...and if I pop open the Help->Developer Tools window, I got this in the JS Console:

Environment and version (please complete the following information):

• hadolint:

  > hadolint --version
  Haskell Dockerfile Linter UNKNOWN

  (but actually it's 2.8.0 -- there's an issue logged about the --version output already.)

• OS: Windows 10.0.19042 Build 19042

Debug information I tried running the same command that the extension output log said it was running:

> hadolint C:\Users\alan\repos\redacted\buggy.Dockerfile --no-color
C:\Users\alan\repos\redacted\buggy.Dockerfile:2:9 expecting the workdir path

From my naive understanding, it appears like maybe the extension is expecting rule-style (DLXXXXX....) output strings all the time and not handling those few error messages that don't have a rule to them.

Additional context This issue looks related to #46 and #55.

[darkvertex]

I should perhaps add that (I think due to #42) even after closing the buggy file, hadolint continues to haunt my notification corner over the file it can't parse right.

[bendem]

I have kind of the same error:

> hadolint /home/demarteaub/projects/infra/docker/postgres/patroni/Dockerfile
/home/demarteaub/projects/infra/docker/postgres/patroni/Dockerfile:79:5 unexpected '&' 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

> hadolint --version
Haskell Dockerfile Linter 2.12.0

[Stikus]

I had the same error as @bendem - any plans to fix it? @michaellzc

[Creative-Difficulty]

same issue @michaellzc