Private methods accessed using bracket notation are reported as 'unused'

[kpreisser]

TypeScript Version: Version 2.3.0-dev.20170220

Code

Compile with strictNullChecks, noImplicitAny, noUnusedLocals

class A {
    private abc(): number {
        return 1;
    }

    public callMethods() {
        let n = this["abc"]();
        console.log(n);
    }
}

Expected behavior:

No error.

Actual behavior:

C:\Users\User\Desktop\tstest>tsc --strictNullChecks --noImplicitAny -noUnusedLocals file1.ts
file1.ts(2,13): error TS6133: 'abc' is declared but never used.

When hovering over n, the IDE displays let n: number so the compiler should know that abc is actually used in this case.

Thanks!

[DanielRosenwasser]

Thanks for the report, but looks like a duplicate of #14137.