no-unused broken in TypeScript 3: TypeError: ts.unescapeIdentifier is not a function

[AlexanderOMara]

no-unused appears to be broken when using TypeScript 3:

This code:

const TEST = 1;

Produces this error:

The 'no-unused' rule threw an error in '/path/to/file.ts':
TypeError: ts.unescapeIdentifier is not a function

[ajafff]

This is fixed upstream in tsutils. The fix is available in the versions 2.x and 3.x of the package. So you probably just need to update the version of that dependency in your lockfile.

[ahanriat]

I'm having the same issue, I'm not very keen to change my lockfile manually though

[ajafff]

@ahanriat If you don't update your lockfile regularly, you will have lot's of outdated dependencies. You will miss all the important bugfixes like the one that shipped in tsutils.

Anyways, this issue was actually fixed before it was reported. I'm not going to rush an update of tsutils as this is a breaking change.