Blank error message when running Ruby 2.6.4

[brenthaas]

After receiving this warning:

haml-lint: warning: parser/current is loading parser/ruby26, which recognizes warning: 2.6.4-compliant syntax, but you are running 2.6.3

I upgraded my application to ruby 2.6.4 and re-ran bundler. After the upgrade I started seeing a blank error message in Atom whenever opening a file to be linted. The problem persists even after a reinstall of linter-haml and the problem disappears when rolled back to Ruby 2.6.3

Here's the error message in Atom (notice, no content):

<atom-notifications><atom-notification class="error icon icon-flame native-key-bindings" tabindex="-1"><div class="content">
  <div class="message item"></div>
  <div class="detail item">
    <div class="detail-content"></div>
    <a href="#" class="stack-toggle"></a>
    <div class="stack-container"></div>
  </div>
  <div class="meta item"></div>
</div>
<div class="close icon icon-x"></div>
<div class="close-all btn btn-error">Close All</div></atom-notification></atom-notifications>

There are no errors in the developer console either.

Anything else to try to see what's happening here?

[moiristo]

I'm having the same issue with ruby 2.6.3 (rbenv, atom 1.41, linter 2.3.1). Running haml-lint from command line works fine.

[jormon]

Same with ruby 2.5.7, atom 1.42, linter 2.3.1