Uncaught Errors: Illegal value for `line`

[AlexCannonball]

Steps:

• Open a protobuf file with a warning for line X.
• Delete some lines so that the document has less than X lines. Don't save the file.
• Change active editor or run protolint.lint command.
• Navigate in VS Code: Extensions -> Proto Lint -> Runtime Status:
  

I've reproduced it with 0.7.0 and 0.8.0.