I'm exploring if it's possible to write a rule that warns against // @ts-ignore comments that have become stale as result of changes in other places of even on the line that tsc is being ignored. My approach is to get all diagnostics and cross reference them with // @ts-ignore comments and see which comment does not actually ignoring an error. But if the // @ts-ignore comment is still there TypeScript will not report any diagnostics for the next line.

Is there any way of getting diagnostics if we remove the // @ts-ignore comment?

One solution is to remove all // @ts-ignore comments from source files of existing program, construct a new program with those source files and get diagnostics. This seems very very expensive

Any thoughts on this?

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