Stackoverflow for invalid ENV statement

[RunDevelopment]

I'm using VS Code's Docker extension which uses your language server. I noticed that syntax highlighting breaks for the input:

ENV DEBIAN_FRONTEND \
noninteractive

The output panel logs:

[Error - 2:50:00 PM] Request textDocument/semanticTokens failed.
  Message: Request textDocument/semanticTokens failed with message: Maximum call stack size exceeded
  Code: -32603 

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This is invalid code, so I can understand if this issue was closed as a non-issue. I reported it anyway because the underlying issue might also affect valid code.

[rcjsuen]

@RunDevelopment Thank you for opening this bug report. Apologies for not getting back to you until now. I am able to reproduce this issue in VS Code.

Looks like this has been fixed by rcjsuen/dockerfile-language-service#76 so the Docker extension will be able to pick this up when I make a new release.

I'll leave this open for now until the change gets rolled into the language server itself.

[rcjsuen]

@RunDevelopment The fix is now live in master. Thanks again for your bug report!

[rcjsuen]

@RunDevelopment I've opened a pull request with VS Code's Docker extension to get the new release adopted, see microsoft/vscode-docker#2585.

[RunDevelopment]

Thank you @rcjsuen!