setting importsNotUsedAsValue: error does not invalidate .tsbuildinfo

[ajafff]

TypeScript Version: 3.8.0-20200104

Search Terms:

Code

// @filename: tsconfig.json
{ "compilerOptions": { "incremental": true } }

// @filename: a.ts
export class C {}

// @filename: b.ts
import {C} from './a';
export let v: C;

• compile
• set "importsNotUsedAsValue": "error" in tsconfig.json
• recompile

Expected behavior:

Expected error in b.ts

Actual behavior:

No error in b.ts unless the file or one of its dependencies are touched.

Related Issues: #35200 @andrewbranch

PR incoming.

[amcasey]

Maybe @andrewbranch was the intended taggee? I'm not mentioned in #35200.

[ajafff]

You're right, I mixed up the names. Sorry for the noise.