TypeError: Cannot read property 'toLowerCase' of null

[lstrzebinczyk]

For a while now eslint fails to start in my vs code and is returning this error:

TypeError: Cannot read property 'toLowerCase' of null
	at Object.e.fromString (/home/killa/.vscode/extensions/dbaeumer.vscode-eslint-2.1.5/client/out/extension.js:1:60516)
	at b.refreshTrace (/home/killa/.vscode/extensions/dbaeumer.vscode-eslint-2.1.5/client/out/extension.js:1:54249)
	at b.initialize (/home/killa/.vscode/extensions/dbaeumer.vscode-eslint-2.1.5/client/out/extension.js:1:46842)
	at /home/killa/.vscode/extensions/dbaeumer.vscode-eslint-2.1.5/client/out/extension.js:1:46447

I did not do any changes, it just started failing. How would I fix it?

[dbaeumer]

How does your setting file look like. I guess you have a "eslint.trace.server" setting with a value of null.

[lstrzebinczyk]

Allright, I did in fact have this, and when I removed it, this error is no longer occuring. Others are, but this must be after some changes on my side after all, and it looks like eslint 6.8 is acting out.
This looks like I should be able to get it to run from here.

If there is anything I can suggest here, is that the error message could have been clearer on this one. Thank you for your help : )

[dbaeumer]

I should protect the code against null.

Will reopen the issue.

[mikestopcontinues]

Actually, forget that, turned out it's a deeper issue with (I think) babel-eslint in my case. I just happened to use the same new syntax ?. in multiple open files.

[dbaeumer]

Added code totday that protects against these null cases.